Pubblicazioni
- 2018-2021 - 2017
2024
5366 Central Bureau for Astronomical Telegrams Mailing address: Hoffman Lab 209; Harvard University; 20 Oxford St.; Cambridge, MA 02138; U.S.A. e-mail: cbatiau@eps.harvard.edu (alternate cbat@iau.org) URL http://www.cbat.eps.harvard.edu/index.html Prepared using the Tamkin Foundation Computer Network
(6086) VRCHLICKY L. Franco, Balzaretto Observatory, Rome, Italy; P. Pravec, Ondrejov Observatory; V. Benishek, Belgrade Astronomical Observatory; R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; L. Buzzi and M. Calabro, Schiaparelli Observatory, Varese, Italy; G. Galli, GiaGa Observatory, Pogliano Milanese, Italy; P. Bacci and M. Maestripieri, San Marcello Pistoiese Observatory, San Marcello Pistoiese, Italy; N. Montigiani and M. Mannucci, Osservatorio Astronomico Margherita Hack, Lastra a Signa, Italy; A. Marchini and R. Papini, Astronomical Observatory University of Siena, Siena, Italy; N. Ruocco, Osservatorio Astronomico Nastro Verde, Sorrento, Italy; M. Tombelli, M. Iozzi, and M. Lombardo, Beppe Forti Astronomical Observatory, Montelupo Fiorentino, Italy; G. Scarfi, Iota Scorpii Observatory, La Spezia, Italy; and G. Baj, M57 Observatory, Saltrio, Italy, report that photometric observations taken with a 0.35-m telescope at the Sopot Observatory in Serbia, a 0.50-m telescope at the Shed of Science South Observatory, a 0.84-m telescope and 0.36-m at the Schiaparelli Observatory, a 0.36-m telescope at the GiaGa Observatory, a 0.60-m telescope at the San Marcello Pistoiese Observatory, a 0.36-m telescope at the Osservatorio Astronomico Margherita Hack, a 0.30-m telescope at the Astronomical Observatory University of Siena, a 0.35-m telescope at the Osservatorio Astronomico Nastro Verde, a 0.40-m telescope at the Beppe Forti Observatory, a 0.40-m telescope at the Iota Scorpii Observatory, and a 0.35-m telescope at the M57 Observatory during 2023 Nov. 17-2023 Dec. 18 reveal that minor planet (6086) is a binary system with an orbital period of 22.61 +/- 0.01 hr. The primary shows a period of 2.7674 +/- 0.0001 hr and has a lightcurve amplitude of 0.07 mag at solar phases 1-12 degrees, suggesting a nearly spheroidal shape. Mutual eclipse/ occultation events that are 0.05 to 0.08 magnitude deep indicate a lower limit on the secondary-to-primary mean-diameter ratio of 0.22.
2024 March 11 (CBET 5366) Daniel W. E. Green
**Collaborative Asteroid Photometry from UAI: 2023 July-September
Franco, Lorenzo ; Scarfi, Giulio ; Baj, Giorgio ; Iozzi, Marco ; Lombardo, Matteo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Falco, Carmelo ; Nastasi, Alessandro ; Fini, Paolo ; Betti, Guido ; Arangio, Julie ; Bacci, Paolo search by orcid ; Maestripieri, Martina ; Montigiani, Nico ; Mannucci, Massimiliano ; Coffano, Alessandro ; Marinello, Wladimiro ; Aceti, Pietro ; Banfi, Massimo ; ...
Abstract
Photometric observations of nine asteroids were made in order to acquire lightcurves for shape/spin axis modeling. Lightcurves were acquired for 81 Terpsichore, 238 Hypatia, 773 Irmintraud, 862 Franzia, 894 Erda, 914 Palisana, 2763 Jeans, 5766 Carmelofalco, and (458732) 2011 MD5.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 51, No.1, pp. 56-61 (2024)
2023
Collaborative Asteroid Photometry from UAI: 2023 April-June
Franco, Lorenzo ; Iozzi, Marco ; Ruocco, Nello search by orcid ; Bacci, Paolo ; Maestripieri, Martina ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Baj, Giorgio ; Coffano, Alessandro ; Marinello, Wladimiro ; Fini, Paolo ; Betti, Guido ; Scarfi, Giulio ; Montigiani, Nico ; Mannucci, Massimiliano
Abstract
Photometric observations of five asteroids were made in order to acquire lightcurves for shape/spin axis modeling. Synodic periods and lightcurve amplitudes were found for 1166 Sakuntala, 1929 Kollaa, 3443 Leetsungdao, and 2020 DB5. We also found color indices for 294 Felicia, 1166 Sakuntala, and 2020 DB5.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 50, No. 4, pp. 264-266 (2023)
A New Lightcurve of 357 Ninina
Pilcher, Frederick ; Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Scarfi, Giulio ; Iozzi, Marco ; Ruocco, Nello search by orcid ; Bacci, Paolo ; Maestripieri, Martina ; Montigiani, Nico ; Mannucci, Massimiliano
Abstract
An international collaboration of observers from North America and Europe presents a lightcurve of the Earth commensurate asteroid 357 Ninina that shows a synodic rotation period 36.00 ± 0.01 hours, amplitude 0.08 ± 0.01 magnitudes with a single deep minimum in an otherwise nearly flat lightcurve.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 50, No. 4, pp. 255-256 (2023)
Collaborative Asteroid Photometry from UAI: 2023 January-March
Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Iozzi, Marco ; Scarfi, Giulio ; Galli, Gianni ; Fini, Paolo ; Betti, Guido ; Coffano, Alessandro ; Marinello, Wladimiro ; Bacci, Paolo search by orcid ; Maestripieri, Martina ; Ruocco, Nello search by orcid ; Mortari, Fabio ; Gabellini, Davide ; Baj, Giorgio ; Lombardo, Matteo ; Aceti, Pietro ; Banfi, Massimo ; Tinelli, Luciano
Abstract
Photometric observations of eight asteroids were made to acquire lightcurves for shape/spin axis modeling. Synodic period and lightcurve amplitude were found for 111 Ate, 197 Arete, 261 Prymno, 325 Heidelberga, 359 Georgia, 737 Arequipa, 1523 Pieksamaki, and 2023 BU. Color indices were measured for 111 Ate, 197 Arete, 261 Prymno, and 737 Arequipa. H-G parameters were found for 197 Arete, 261 Prymno, and 359 Georgia
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 50, No. 3 Collaborative Asteroid Photometry from UAI: 2023 January-March
2022
An Improved Lightcurve and Rotation Period of 1178 Irmela
Pilcher, Frederick ; Franco, Lorenzo ; Scarfi, Giulio ; Bacci, Paolo search by orcid ; Maestripieri, Martina ; Fini, Paolo ; Betti, Guido ; Marchini, Alessandro search by orcid
Abstract
A collaboration of observers from North America and Europe has produced a lightcurve of 1178 Irmela with synodic period 11.992 ± 0.001 hours, amplitude 0.29 ± 0.02 magnitudes, and full phase coverage.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 50, No. 3, pp. 193-194 (2023)
A Comprehensive Photometric Study of 603 Timandra
Pilcher, Frederick ; Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Bacci, Paolo search by orcid ; Maestripieri, Martina ; Bachini, Mauro ; Succi, Giacomo ; Galli, Gianni ; Bertagna, Luca ; Iozzi, Marco ; Squilloni, Alessio ; Tombelli, Maura ; Iozzi, Marco ; Scarfi, Giulio
Abstract
Based on 65 sessions 2022 Sept. 24 - Dec. 28, we find for 603 Timandra a synodic rotation period of 330.1 ± 0.5 hours and amplitude 0.80 ± 0.05 magnitudes. There is also low-level tumbling with a possible second period of 273 hours, PAR -2. The period, amplitude, and epoch of lightcurve maximum all agree with a recent posting on the DAMIT website. Data obtained on 2022 Oct. 15 show that (B-V) = 0.80 ± 0.04 and (V-R) = 0.51 ± 0.02. At midlight, H = 12.18 ± 0.14 in the V band, G = 0.20 ± 0.17.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 50, No. 2, pp. 121-124 (2023)
Collaborative Asteroid Photometry from UAI: 2022 July-September
Franco, Lorenzo ; Iozzi, Marco ; Scarfi, Giulio ; Mortari, Fabio ; Gabellini, Davide ; Ruocco, Nello ; Fini, Paolo ; Betti, Guido ; Marchini, Alessandro search by orcid ; Aceti, Pietro ; Banfi, Massimo ; Baj, Giorgio ; Bacci, Paolo ; Maestripieri, Martina ; Bachini, Mauro ; Succi, Giacomo ; Coffano, Alessandro ; Marinello, Wladimiro ; Galli, Gianni ; Montigiani, Nico ; Mannucci, Massimiliano
Abstract
Photometric observations of six asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 78 Diana, 198 Ampella, 895 Helio, 1060 Magnolia, 1543 Bourgeois, 1806 Derice. We also found color indices for 78 Diana, 198 Ampella, 895 Helio, 1060 Magnolia and H-G parameters for 198 Ampella.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 50, No. 1, pp. 47-50 (2023)
Collaborative Asteroid Photometry from UAI: 2022 April-June
Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Bacci, Paolo ; Maestripieri, Martina ; Ruocco, Nello ; Scarfi, Giulio ; Iozzi, Marco ; Montigiani, Nico ; Mannucci, Massimiliano ; Baj, Giorgio ; Valvasori, Adriano ; Guido, Ernesto ; Galli, Gianni ; Buzzi, Luca
Abstract
Photometric observations of ten asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 323 Brucia, 342 Endymion, 542 Susanna, 578 Happelia, 1656 Suomi, 4221 Picasso, (5693) 1993 EA, (7335) 1989 JA, 2022 BT and 2022 MP. We also found color indices for 323 Brucia and (7335) 1989 JA.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 49, No. 4, pp. 342-346 (2022)
Collaborative Asteroid Photometry from UAI: 2022 January-March
Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Iozzi, Marco ; Scarfi, Giulio ; Mortari, Fabio ; Gabellini, Davide ; Bacci, Paolo ; Maestripieri, Martina ; Baj, Giorgio ; Galli, Gianni ; Coffano, Alessandro ; Marinello, Wladimiro ; Pizzetti, Giampaolo ; Aceti, Pietro search by orcid ; Banfi, Massimo ; Tinelli, Luciano ; Montigiani, Nico ; Mannucci, Massimiliano ; Noschese, Alfonso ; Mollica, Maurizio ; Guido, Ernesto ; Ruocco, Nello ; Bachini, Mauro ; Succi, Giacomo
Abstract
Photometric observations of eleven asteroids were made to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 49 Pales, 142 Polana, 206 Hersilia, 737 Arequipa, 1071 Brita, 1120 Cannonia, 1166 Sakuntala, 1736 Floirac, 3103 Eger, 4528 Berg and (7482) 1994 PC1. We also found color indices for 49 Pales, 142 Polana, 206 Hersilia, 1071 Brita, 1120 Cannonia, 3103 Eger and 4528 Berg; along with H-G parameters for 49 Pales, 1071 Brita, and 4528 Berg.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 49, No. 3, pp. 200-204 (2022)
Collaborative Asteroid Photometry from UAI: 2021 October-December
Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Papini, Riccardo ; Iozzi, Marco ; Bacci, Paolo ; Maestripieri, Martina ; Baj, Giorgio ; Galli, Gianni ; Mortari, Fabio ; Gabellini, Davide ; Ruocco, Nello ; Tinelli, Luciano ; Montigiani, Nico ; Mannucci, Massimiliano ; Scarfi, Giulio ; Salvaggio, Fabio
Abstract
Photometric observations of eight asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 197 Arete, 359 Georgia, 796 Sarita, 901 Brunsia, 1346 Gotha, 4660 Nereus, 4935 Maslachkova and 6249 Jennifer.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 49, No. 2, pp. 128-130 (2022)
Collaborative Asteroid Photometry from UAI: 2021 July-September
Franco, Lorenzo ; Marchini, Alessandro ; Papini, Riccardo ; Scarfi, Giulio ; Bacci, Paolo ; Maestripieri, Martina ; Aceti, Pietro ; Banfi, Massimo ; Bachini, Mauro ; Succi, Giacomo ; Galli, Gianni
Abstract
Photometric observations of eight asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 58 Concordia, 224 Oceana, 1046 Edwin, 2431 Skovoroda, 2824 Franke, (7822) 1991 CS, (143649) 2003 QQ47, and color index (V-R) for 790 Pretoria.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 49, No. 1, pp. 35-37-374 (2022)
2021
Collaborative Asteroid Photometry from UAI: 2021 April-June
Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Iozzi, Marco ; Scarfi, Giulio ; Montigiani, Nico ; Mannucci, Massimiliano ; Aceti, Pietro ; Banfi, Massimo ; Mortari, Fabio ; Galli, Gianni ; Bacci, Paolo ; Maestripieri, Martina ; Valvasori, Adriano ; Guido, Ernesto
Abstract
Photometric observations of eight asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 81 Terpsichore, 363 Padua, 563 Suleika, 909 Ulla, 929 Algunde, 1048 Feodosia, 3385 Bronnina, 3760 Poutanen
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 48, No. 4, pp. 372-374 (2021)
Collaborative Asteroid Photometry from UAI: 2021 January-March
Franco, Lorenzo ; Marchini, Alessandro search by orcid ; Cavaglioni, Leonardo ; Papini, Riccardo ; Privitera, Chiara Angelica ; Baj, Giorgio ; Galli, Gianni ; Scarfi, Giulio ; Aceti, Pietro search by orcid ; Banfi, Massimo ; Bacci, Paolo ; Maestripieri, Martina ; Mannucci, Massimiliano ; Montigiani, Nico ; Tinelli, Luciano ; Mortari, Fabio
Abstract
Photometric observations of six asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 374 Burgundia, 472 Roma, 593 Titania, 1106 Cydonia, 1152 Pawona, and 3332 Raksha. We also found color index (V-R) for 472 Roma and 1152 Pawona along with H-G parameters for: 472 Roma and 3332 Raksha
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 48, No. 3 pp. 219-222 (2021)
Photometric Analysis and Rotation Period Determination of the Potentially Hazardous Asteroid 2020 WU5
Marchini, Alessandro; Papini, Riccardo; Baj, Giorgio; Galli, Gianni; Bacci, Paolo; Franco, Lorenzo
Abstract
Photometric observations of 2020 WU5 were conducted in 2021 January in order to determine its synodic rotation period and revealed a bimodal solution with P = 5.574 ± 0.002 h and an amplitude A = 0.84 ± 0.08 mag.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 48, No. 2, pp. 104-105 (2021))
Collaborative Asteroid Photometry from UAI: 2020 October-December
Franco, Lorenzo; De Pieri, Antonio; Brosio, Antonino; Papini, Riccardo; Salvaggio, Fabio; Scarfi, Giulio; Marchini, Alessandro; Ruocco, Nello; Galli, Gianni; Mannucci, Massimiliano; Montigiani, Nico; Tinelli, Luciano; Aceti, Pietro, Banfi, Massimo; Baj, Giorgio; Casalnuovo, Giovanni Battista; Chinaglia, Benedetto; Bacci, Paolo; Maestripieri, Martina; Coffano, Alessandro; Marinello, Wladimiro ; ...
Abstract
Photometric observations of five asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 102 Miriam: 23.63 ± 0.01 h, 0.14 mag; 635 Vundtia: 11.784 ± 0.004 h, 0.20 mag; 1342 Brabantia: 4.175 ± 0.001 h, 0.13 mag; 2346 Lilio: 3.0290 ± 0.0005 h, 0.18 mag; (153201) 2000 WO107: 5.026 ± 0.001 h, 1.14 mag.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 48, No. 2, pp. 120-122 (2021)
Occultazione (357) Ninina 28/02/2021 Euraster
2020
Collaborative Asteroid Photometry from UAI: 2020 July-September
Franco, Lorenzo; Scarfi, Giulio; Marchini, Alessandro; Aceti, Pietro; Banfi, Massimo; Papini, Riccardo; Salvaggio, Fabio; Guido, Ernesto; Catapano, Antonio; Valvasori, Adriano; Guido, Ernesto; De Pieri, Antonio; Brosio, Antonino; Tinelli, Luciano; Ciarnella, Alessio; Guido, Ernesto; Rocchetto, Marco
Abstract Photometric observations of six main-belt and one near-Earth asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 375 Ursula: 16.900 ± 0.004 h, 0.09 mag; 444 Gyptis: 6.2136 ± 0.0006 h, 0.09 mag; 737 Arequipa: 7.024 ± 0.001 h, 0.14 mag; 1146 Biarmia: 5.4697 ± 0.0007 h, 0.17 mag; 1346 Gotha: 2.6366 ± 0.0006 h, 0.11 mag; 1656 Suomi: 2.5892 ± 0.0006 h, 0.11 mag; 2020 PL2: 0.3606 ± 0.0001 h, 1.5 mag.
The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 48, No. 1, pp. 20-22 (2021)
Collaborative Asteroid Photometry from UAI: 2020 April-June
Franco, Lorenzo; Marchini, Alessandro; Scarfi, Giulio; Papini, Riccardo; Salvaggio, Fabio; Baj, Giorgio; Galli, Gianni; Bacci, Paolo; Maestripieri, Martina; Luciano, Tinelli
Abstract Photometric observations of five asteroids were made in order to acquire lightcurves for shape/spin axis modeling. The synodic period and lightcurve amplitude were found for 58 Concordia: 9.8953 ± 0.0007 h, 0.08 mag; 781 Kartvelia: 19.050 ± 0.005 h, 0.22 mag; 913 Otila: 4.8717 ± 0.0007 h, 0.18 mag; 3317 Paris: 7.0812 ± 0.0004 h, 0.10 mag; and 3800 Karayusuf: 2.2319 ± 0.0001 h, 0.15 mag. Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 47, No. 4, pp. 270-272 (2020) Pub Date:October 2020
Collaborative Asteroid Photometry from UAI: 2020 January-March
Franco, Lorenzo; Marchini, Alessandro; Saya, Leonella-Filippa; Galli, Gianni; Baj, Giorgio; Ruocco, Nello; Tinelli, Luciano; Scarfi, Giulio; Aceti, Pietro; Banfi, Massimo; Bacci, Paolo; Maestripieri, Martina; Papini, Riccardo; Salvaggio, Fabio; Mortari, Fabio; Bachini, Mauro; Casalnuovo, Giovanni Battista; Chinaglia, Benedetto
Abstract
Photometric observations of eight main-belt and one near-Earth asteroid were made in order to acquire lightcurves for shape/spin axis models. The synodic period and lightcurve amplitude were found for 78 Diana: 7.2940 ± 0.0006 h, 0.06 mag; 81 Terpsichore: 10.946 ± 0.002 h, 0.14 mag; 118 Peitho: 7.8066 ± 0.0006 h, 0.23 mag; 755 Quintilla: 4.550 ± 0.001 h, 0.04 mag; 782 Montefiore: 4.0726 ± 0.0002 h, 0.51 mag; 1052 Belgica: 2.7094 ± 0.0001 h, 0.08 mag; 3998 Tezuka: 3.08 ± 0.01 h, 0.49 mag; 7132 Casulli: 3.5238 ± 0.0002 h, 0.14 mag; (52768) 1998 OR2: 4.111 ± 0.001 h, 0.30 mag. We also confirmed the binary nature of the asteroid 1052 Belgica and detected the binary nature of the asteroid 7132 Casulli.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 47, No. 3, pp. 242-246 (2020) Pub Date: July 2020
Collaborative Asteroid Photometry from UAI: 2019 October-December
Franco, Lorenzo; Marchini, Alessandro; Scarfi, Giulio; Bacci, Paolo; Galli, Gianni; Baj, Giorgio; Papini, Riccardo; Marino, Giuseppe; Banfi, Massimo; Salvaggio, Fabio; Bacci, Roberto; Tinelli, Luciano; Mortari, Fabio; Foylan, Mike
Abstract: Photometric observations of seven asteroids, six mainbelt and one near-Earth, were made in order to acquire lightcurves for shape/spin axis models. The synodic period and lightcurve amplitude were found for: 204 Kallisto: 19.505 ± 0.005 h, 0.12 mag; 459 Signe: 5.3555 ± 0.0003 h, 0.32 mag; 563 Suleika: 5.6656 ± 0.0004 h, 0.13 mag; 773 Irmintraud: 6.7484 ± 0.0008 h, 0.05 mag; 1060 Magnolia: 2.9102 ± 0.0006 h, 0.11 mag; 3533 Toyota: 2.9816 ± 0.0004 h, 0.15 mag; (162082) 1998 HL1: 11.60 ± 0.01 h, 0.21 mag.
Publication The Minor Planet Bulletin ** (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 47, No. 2, pp. 144-147 (2020) Pub Date: April 2020
The asteroid (7132) Casulli is a binary system
Franco, Lorenzo; Marchini, Alessandro; Bonnoli, Giacomo; Papini, Riccardo; Bacci, Paolo; Maestripieri, Martina; Ruocco, Nello; Montigiani, Nico; Mannucci, Massimiliano; Scarfi, Giulio
Abstract: (7132) Casulli is a main belt asteroid discovered on 1993 Sept. 17 by A. Vagnozzi at Stroncone (Italy) and is named in honor of Silvano Casulli (1944 - 2018), who was the first amateur astronomer in the world to obtain precise astrometric positions of minor planets using a CCD camera (Minor Planet Circular 30800).
Publication: The Astronomer's Telegram, No. 13590 Pub Date: March 2020
Collaborative Asteroid Photometry from UAI: 2019 July-Septembe
Franco, Lorenzo; Marchini, Alessandro; Arena, Claudio; Casalnuovo, Giovanni Battista; Chinaglia, Benedetto; Valvasori, Adriano; Bacci, Paolo; Maestripieri, Martina; Baj, Giorgio; Galli, Gianni
Abstract: Photometric observations of five main-belt and one near-Earth asteroid were made in order to acquire lightcurves for shape/spin axis models. The synodic period and lightcurve amplitude were found for: 289 Nenetta, 6.916 ± 0.001 h, 0.19 mag; 472 Roma, 9.792 ± 0.002 h, 0.29 mag.; 635 Vundtia, 11.794 ± 0.002 h, 0.21 mag; 869 Mellena, 6.528 ± 0.008 h, 0.30 mag; 2131 Mayall, 2.5677 ± 0.0001 h, 0.08 mag; 2019 NN3, 0.03750 ± 0.00003 h, 0.98 mag. We also confirmed the binary nature of the asteroid 2131 Mayall.
Publication: The Minor Planet Bulletin (ISSN 1052-8091). Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers, Vol. 47, No. 1, pp. 61-63 (2020) Pub Date: January 2020
2019
CBET 4676 (18303)1980 PU Binary V. Benishek, Belgrade Astronomical Observatory; P. Pravec and P. Kusnirak, Ondrejov Observatory; R. Durkee, Shed of Science South Observatory, Pontotoc, TX, U.S.A.; D. Pray, Sugarloaf Mountain Observatory, South Deerfield, MA, U.S.A.; V. Chiorny and O. Mikhalchenko, Kharkiv Observatory; M. Husarik and M. Pikler, Skalnate Pleso Observatory; J. Oey, Blue Mountains Observatory, Leura, NSW, Australia; P. Bacci and M. Maestripieri, Astronomical Observatory, San Marcello Pistoiese, Italy; and A. Aznar, Isaac Aznar Observatory, Alcublas, Valencia, Spain, report that photometric observations taken with a 0.35-m telescope at the Sopot Observatory in Serbia, a 0.50-m telescope at the Shed of Science South Observatory, a 0.50-m telescope at the Sugarloaf Mountain Observatory, a 0.70-m telescope at the Chuguev station of the Kharkiv Observatory in Ukraine, a 0.61-m telescope at the Skalnate Pleso Observatory, a 0.35-m telescope at the Blue Mountains Observatory, a 0.60-m telescope at the San Marcello Pistoiese Observatory, and a 0.35-m telescope at the Isaac Aznar Observatory during Aug. 10-Oct. 2 reveal that minor planet (18303) is a binary system with an orbital period of 12.270 +/- 0.003 hr. The primary shows a period of 2.72627 +/- 0.00010 hr and has a lightcurve amplitude of 0.10 magnitude at solar phases 4-14 degrees, suggesting a nearly spheroidal shape. Mutual eclipse/occultation events that are 0.05 to 0.12 magnitude deep indicate a secondary-to-primary mean-diameter ratio of 0.24 +/- 0.03.
CBET 4675: COMET C/2018 DO_4
An apparently asteroidal object discovered on CCD images taken last
year
by G. J. Leonard with the Mount Lemmon Survey's 1.5-m reflector (and
announced
with minor-planet designation on MPEC 2018-F13) has been found to show
cometary activity now near perihelion. The discovery astrometry is
tabulated
below; follow-up observations appeared on MPEC 2018-Y11.
2018 UT R.A. (2000) Decl. Mag. Observer
Feb. 25.31328 12 43 55.51 +19 42 43.9 20.6 Leonard
25.31843 12 43 55.22 +19 42 46.7 21.3 "
25.32358 12 43 54.90 +19 42 50.0 21.3 "
25.32874 12 43 54.62 +19 42 53.7 21.0 "
CCD astrometrists elsewhere have reported cometary appearance in 2018 DO4.
L. Buzzi, Varese, Italy, reports that stacked images taken with his 0.60-m
f/4.6 reflector on Aug. 30.1 UT show a 15" coma and a tail at least 30" long
in p.a. 282 degrees; the magnitude was measured as 16.6. Buzzi adds that he
measured ninety stacked 15-s images obtained by R. Holmes with a 0.76-m f/3
astrograph at Westfield, IL, USA, on Sept. 4.4, which show an elongated coma
and a broad, curved tail 50" long in p.a. 285 deg; the magnitude was given
as
17.2-17.8. Buzzi further comments on images taken with his 0.60-m reflector
on Sept. 17.1 that show a strongly condensed coma 10" wide (red mag 16.8)
with a broad, fan-shaped tail at least 45" long centered in p.a. 294 deg.
M. Micheli reports that images taken on Sept. 2.63 and 3.63 by K. J. Meech
and J. Kleyna with the 3.6-m Canada-France-Hawaii Telescope at Mauna Kea
show a broad tail about 25" long in p.a. about 300 degrees. W. Ryan notes
that his images taken on Sept. 3.4 with the Magdalena Ridge Observatory
2.4-m reflector show a bright coma with distinct tail in p.a. about 290
degrees. H. Sato, Tokyo, Japan, writes that six stacked 60-s exposures
taken
on Sept. 4.47 with a 0.43-m f/6.8 astrograph near Mayhill, NM, USA, show a
condensed coma 20" in diameter with a fan-like tail 40" long toward p.a.
260-300 degrees; the magnitude was 16.1 as measured within a circular
aperture of radius 11".5.
Twelve co-added 40-s unfiltered exposures taken by T. Chen with a 0.3-m
f/7.2 reflector at Ngari, Tibet, China, in the course of the BIST survey
(cf. CBET 4629) around Sept. 4.89 (and measured by D. W. E. Green) show a
well-condensed coma of size about 7" in 3" seeing, with a faint tail perhaps
15" long in p.a. 267 degrees; the total magnitude was 17.4 in an aperture of
diameter 10". Twenty-four stacked 40-s BIST exposures on Sept. 5.9 show a
well-condensed coma of size 8"-10" in 2".6 seeing, with a faint tail perhaps
15" long fanned in p.a. 251-314 degrees; the total magnitude was 17.0 in an
aperture of diameter 12". Fifteen stacked BIST exposures taken on Sept. 6.9
show a well-condensed coma of size about 7" in 3" seeing, with a faint but
obvious fan tail up to 25" long centered at p.a. about 275 degrees; the
total
unfiltered magnitude was 17.0 in an aperture of diameter 30". Thirty-one
stacked BIST exposures taken on Sept. 7.9 show a well-condensed coma of size
about 8", with a faint but obvious fan tail up to 15" long centered at p.a.
about 275 degrees (fan perhaps 80 degrees wide); the total unfiltered
magnitude was 17.1 in an aperture of diameter 20". Nine stacked BIST
exposures taken on Sept. 8.8 show a condensed coma of size about 9" that is
elongated along p.a. 345/175 degrees, with a faint-but-obvious diffuse tail
up perhaps 20" long centered at p.a. about 280 degrees; the total magnitude
was 16.4 in an aperture of diameter 20". Thirty-three stacked BIST
exposures taken on Sept. 9.9 show a condensed coma of diameter about 10" (in
2".6 seeing) with a faint-but-obvious, diffuse fan tail perhaps 22" long
centered at p.a. about 270 degrees; the total magnitude was 17.3 in an
aperture of diameter 14".
R. Haver writes that twenty-four 90-s exposures taken on Sept. 8.11
with
a 0.37-m f/7 Cassegrain reflector at Frasso Sabino, Italy, shows a coma of
diameter 6".5 and magnitude 16.0; there was a slightly curved fan tail about
45" long in p.a. 287 degrees. Haver's follow-up images on Oct. 6.16 show
total red mag 16.5 with a coma diamete of 10".7 and a curved tail 44" long
in p.a. 292 degrees. S. Nakano, Sumoto, Japan, forwards a report by Y.
Mizuno (Kani, Japan) whose CCD images taken on Sept. 9.73 show magnitude
16.8 and a tail 0.5 degree long in p.a. 270 degrees. F. Kugel reports that
unfiltered CCD images taken on Sept. 12.15 by C. Rinner and himself with a
0.4-m f/2.8 reflector at Dauban, France, show a condensed coma and a broad
tail in p.a. 276 deg. Unfiltered images taken by J.-F. Soulier taken on
Sept. 16.1 with a 0.30-m f/3.8 Newtonian reflector at Maisoncelles, France,
show a coma about 15" in size and a tail about 25" long in p.a. 270-300 deg;
the magnitude was 16.7 in an aperture of radius 6".5. Soulier adds that
exposures taken on Sept. 19.1 show a coma of size about 19" and a tail about
25" long in p.a. 210-300 degrees; the magnitude was about 16.7 in an
aperture
of radius 6".5. Twenty stacked 30-s unfiltered exposures taken remotely on
Sept. 29.34 by E. Guido, Castellammare di Stabia, Italy, with a 0.6-m f/6.5
astrograph at El Sauce Observatory in Chile show a coma nearly 20" in
diameter with a central condensation and a diffuse fan-shaped tail about 45"
long toward p.a. 275 degrees. V. Rumyantsev reports that images taken on
Oct. 2.035 UT with the 2.6-m Shajn telescope of Crimean Astrophysical
Observatory at Nauchny, Crimea, show a bright 14" coma of red mag 17.3 and a
60" tail toward p.a. about 290 deg. Sixty stacked 60-s exposures taken by
P. Bacci, M. Maestripieri, and M. Facchini with a 0.60-m f/4 reflector at
San Marcello Pistoiese, Italy, on Oct. 6.1 show a coma with red mag 15.8 and
a tail 1'10" long in p.a. 302 degrees; they have posted a stacked image of
the comet at URL http://backman.altervista.org/Aimg/2018DO4_01_sm.jpg.
Additional astrometry has been published on MPEC 2019-T99. The
following
orbital elements by S. Nakano, Sumoto, Japan, are from 374 observations
spanning 2016 Apr. 5-2019 Oct. 2 (mean residual 0".39). The comet passed
2.87 AU from Jupiter on 2017 May 28 UT; its next return to perihelion is
predicted to be on 2147 October 10. No additional observations have been
identified in archival astrometry.
Epoch = 2019 Aug. 25.0 TT
T = 2019 Aug. 18.40490 TT Peri. = 175.97274
e = 0.9069557 Node = 251.13292 2000.0
q = 2.4059613 AU Incl. = 160.47470
a = 25.8582318 AU n = 0.00749559 P = 131.5 years
The following ephemeris by the undersigned from the above orbital elements
uses power-law photometric parameters H = 12.5 and 2.5n = 6 for the
predicted
magnitudes.
COLLABORATIVE ASTEROID PHOTOMETRY FROM UAI: 2019 MAY-JUNE Lorenzo Franco Balzaretto Observatory (A81), Rome, ITALY Alessandro Marchini Astronomical Observatory, DSFTA - University of Siena (K54) Giorgio Baj M57 Observatory (K38), Saltrio, ITALY Riccardo Papini, Massimo Banfi, Fabio Salvaggio Wild Boar Remote Observatory (K49) Paolo Bacci, Martina Maestripieri San Marcello Pistoiese (104), Pistoia, ITALY Gianni Galli GiaGa Observatory (203), Pogliano Milanese, ITALY Giovanni Battista Casalnuovo, Benedetto Chinaglia Filzi School Observatory, Laives, ITALY Mauro Bachini, Giacomo Succi Santa Maria a Monte (A29), ITALY **Minor Planet Bulletin **MPB-46-4 Oct-Dec 2019
SPIN-SHAPE MODEL FOR 131 VALA Lorenzo Franco Balzaretto Observatory (A81), Frederick Pilcher Organ Mesa Observatory (G50) USA; Alessandro Marchini Astronomical Observatory, DSFTA - University of Siena (K54), Giorgio Baj M57 Observatory (K38), Saltrio, ITALY, Paolo Bacci, Martina Maestripieri San Marcello Pistoiese (104), Pistoia, ITALY, Roberto Bacci G. Pascoli Observatory (K63), Castelvecchio Pascoli, ITALY Minor Planet Bulletin MPB-46-4 Oct-Dec 2019
Lorenzo Franco,Alessandro Marchini,Riccardo Papini, Massimo Banfi, Fabio Salvaggio
Alfonso Noschese, Antonio Vecchione, Antonio Catapano
H-G PARAMETERS FOR (37652) 1994 JS1
Minor Planet Bulletin MPB-46-4 Oct-Dec 2019
Lower atmosphere and pressure evolution on Pluto from ground-based stellar occultations, 1988–2016 A&A 625, A42 (2019) PDF
ASTRONOMIA Gennaio Febbraio 2019 Corpi Minori Atti
Lorenzo Franco, Alessandro Marchini, Roberto Bacci,Albino Carbognani
2018RC:A FAST ROTATING TUMBLING ASTEROID
Minor Planet Bulletin MPB-46-2 Apr-Jun 2019 Pages 188-189
Lorenzo Franco, NicoMontigiani, Massimiliano Mannucci, Walter Benedetti
LIGHTCURVE AND A SPIN-SHAPE MODEL FOR 16847 SANPOLOAMOSCIANO
Minor Planet Bulletin MPB-46-2 Apr-Jun 2019 Pages 197-188
Riccardo Papini, Massimo Banfi, Fabio Salvaggio, Alessandro Marchini, Lorenzo Franco
ROTATION PERIOD DETERMINATION OF THE ASTEROID 5321 JAGRAS (1985 VN)
Minor Planet Bulletin MPB-46-2 Apr-Jun 2019 Pages 218-219
Franco, Lorenzo; Marchini, Alessandro; Baj, Giorgio; Scarfi, Giulio; Bacci, Paolo; Maestripieri, Martina; Bacci, Roberto; Papini, Riccardo; Salvaggio, Fabio; Banfi, Massimo
Lightcurves for 131 Vala, 374 Burgundia, 734 Brenda, and 929 Algunde
Minor Planet Bulletin MPB-46-1 Jan Mar 2019 Pages 85-86
2018
Lorenzo Franco, Alessandro Marchini, Giorgio Baj, Giulio Scarfi, Giacomo Succi, Mauro Bachini, Claudio Arena.
LIGHTCURVES FOR 91 AEGINA, 235 CAROLINA,1117 REGINITA, AND (505657) 2014 SR339
Minor Planet Bulletin MPB-45-4 Ott Dic 2018 pag. 399
Lorenzo Franco, Paolo Bacci, Martina Maestripieri,Giulio Carotta, Marco Carotta, Linda Nesti and Martina Fragai
Minor Planet Bulletin MPB-45-4 Ott Dic 2018 pag. 403
LIGHTCURVE FOR 3800 KARAYUSUF.
Franco, Lorezo; Marchini, Alessandro; Baj, Giorgio; Scarfi, Giulio; Casalnuo