The Minor Planet Bulletin

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The Minor Planet Bulletin is the journal for almost all amateurs and even some professionals for publishing asteroid photometry results, including lightcurves, H-G parameters, color indexes, and shape/spin axis models. It is considered to be a refereed journal by the SAO/NASA ADS. All MPB papers are indexed in the ADS.

Print subscriptions are no longer available to individuals. Institutions (e.g., college libraries) can still obtain print copies via a special subscription. See details in MPB 37-4 or contact the editor, Richard Binzel.

Annual voluntary contributions of $5.00 or more in support of the publication are welcome.
Please send a check, drawn on a U.S. bank and payable in U.S. funds, to "Minor Planet Bulletin" and send it to:

Minor Planet Bulletin
c/o Melissa Hayes-Gehrke
UMD Astronomy Department
1113 PSC Bldg 415
College Park, MD 20742

Authors Guide and Word Templates   (v.2.9: updated 2019 November 14)
The ZIP file contains the Authors Guide PDF as well as a "starter" paper in Word 97 (DOT) and Word 2007+ (DOTX).
Please read this updated guide since there are a number of changes from previous guides.
  • The Pts column is no longer required and has been removed from the template for the standard table
    to allow more room for the other columns.
  • The phase column should have only two values: for the first and last date in the range.
    If the phase reaches an extrema between those dates, put an asterisk before the first value. For example,
  • Use semicolons to separate names in the references section. For example:
       Smith, J.J.; Jones, A.A. (2019).
    This also applies if using several references to the same author in the text. For example:
    "This asteroid was observed at three previous apparitions (Jones, 2015; 2017; 2018)..."

Cumulative Index to Volumes 1-45
Cumulative Asteroid Lightcurve Index (Volumes 1 through 50-1)

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Issues for the upcoming quarter-year are released on about the 21st of March, June, September, and December. Full issues and individual papers from vol 1 (1973) to present are available via links on this page.

Important: If the ADS bibcode and "Download PDF" links are missing for the latest issue, it is because the ADS has not processed the files. The links will be made available after the ADS processes the files.
If the "Download PDF" link is visible and there is no PDF available, clicking the link will download an arbitrary page. We are working with ADS to make sure all papers are available and, if not, being able to diasable the link. The "Download Full Issue" link does retrieve the correct file.

Vol 1-7 run Jul-Jun. Vol 8-present run Jan-Dec. Only papers indexed in the ADS are included. Earlier volumes often contain more papers than listed here. It's recommended to download the full issue in vol 1-9.

Volume 51 (2024)

Volume 50 (2023)

Volume 49 (2022)

Volume 48 (2021)

Volume 47 (2020)

Volume 46 (2019)

Volume 45 (2018)

Volume 44 (2017)

Volume 43 (2016)

Volume 42 (2015)

Volume 41 (2014)

Volume 40 (2013)

Volume 39 (2012)

Volume 38 (2011)

Volume 37 (2010)

Volume 36 (2009)

Volume 35 (2008)

Volume 34 (2007)

Volume 33 (2006)

Volume 32 (2005)

Volume 31 (2004)

Volume 30 (2003)

Volume 29 (2002)

Volume 28 (2001)

Volume 27 (2000)

Volume 26 (1999)

Volume 25 (1998)

Volume 24 (1997)

Volume 23 (1996)

Volume 22 (1995)

Volume 21 (1994)

Volume 20 (1993)

Volume 19 (1992)

Volume 18 (1991)

Volume 17 (1990)

Volume 16 (1989)

Volume 15 (1988)

Volume 14 (1987)

Volume 13 (1986)

Volume 12 (1985)

Volume 11 (1984)

Volume 10 (1983)

Volume 9 (1982)

Volume 8 (1981)

Volume 7 (1980)

Volumes 6-7 (1979)

Volumes 5-6 (1978)

Volumes 4-5 (1977)

Volumes 3-4 (1976)

Volumes 2-3 (1975)

Volumes 1-2 (1974)

Volume 1 (1973)

Issue 50-3 (2023 Jul-Sep)
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Show abstracts

Lightcurve Analysis for Sixteen Main-Belt Asteroids
Pages 183-188
Fornas, Gonzalo ; Huet, Fernando; Arce, Enrique; Fornas, Alvaro
2023MPBu...50..183F    Download PDF

Photometric observations of sixteen main-belt asteroids were obtained on the nights from 2022 August - December. We derived the following rotational periods: 1055 Tynca 11.893 ± 0.001 h, 1417 Walinskia, 1500 Jyvaskyla 8.827 ± 0.0002 h, 2003 Harding 4.453 ± 0.001 h, 2695 Christabel 5.623 ± 0.004 h, 3686 Antoku 6.744 ± 0.006 h, 4528 Berg 3.564 ± 0.001 h, 5501 1982 FF2 2.464 ± 0.002 h, 5643 Roques 7.490 ± 0.03 h, 7195 Danboice 8.689 ± 0.007 h, 7317 Cabot 2.345 ± 0.002 h, 12999 Torun 4.020 ± 0.002 h, 15476 Narendra, 19750 2000 CM62 6.518 ± 0.001 h, 23892 1998 SH49 3.722 ± 0.001 h, 33697 1999 KJ11 4.876 ± 0.003 h.

Lightcurve Analysis of the Koronis Family Member 1840 Hus
Pages 189
Fornas, Gonzalo; Fornas, Alvaro; Arce, Enrique; Huet, Fernando
2023MPBu...50..189F    Download PDF

We report rotation lightcurves of 1840 Hus observed during its apparition in 2023. We have analyzed our data to calculate the synodic period with the Canopus software. Our conclusion with the available data is that the synodic rotation period is 4.7491 h.

Lightcurve and Constraints on the Spin Vector of Koronis Family Member (1840) Hus: Illustrating Analysis of a Combined Data Set
Pages 190-193
Slivan, Stephen M.; McLellan-Cassivi, Claire J.; Serra-Ricart, Miquel; Alarcón, M.R.
2023MPBu...50..190S    Download PDF

A new lightcurve of Koronis asteroid family member (1840) Hus records two consecutive rotations and confirms the resolution by Slivan et al. (2021) of the rotation period alias. The data are analyzed together with additional new lightcurves (Fornas et al., 2023) as well as observations from earlier apparitions as a case study to illustrate a spin vector determination described in detail, and as an example of an analysis that is documented so that a reader can understand what level of confidence is merited for the results. The Hus data set yields an unambiguous count of rotations back to 2001, a sidereal rotation period of 4.749052 ± 0.000002 h, and indicates that the spin is prograde with a high-latitude pole.

An Improved Lightcurve and Rotation Period of 1178 Irmela
Pages 193-194
Pilcher, Frederick; Franco, Lorenzo; Scarfi, Giulio; Bacci, Paolo; Maestripieri, Martina; Fini, Paolo; Betti, Guido; Marchini, Alessandro
2023MPBu...50..193P    Download PDF

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.

Rotation Period Determination for the Mars-Crossing Asteroid (97514) 2000 Dl1
Pages 195
Marchini, Alessandro; Papini, Riccardo; Franco, Lorenzo
2023MPBu...50..195M    Download PDF

Photometric observations of the Mars-crossing asteroid (97514) 2000 DL1 were conducted in order to determine its synodic rotation period. The asteroid is certainly a slow rotator and the period has not been completely covered by our observations. We present the most likely bimodal solution with a period of P = 163.6 ± 0.3 h, A = 0.47 ± 0.09 mag.

Broad-Band Photometric Monitoring of 2500 Alascattalo
Pages 196-197
Bentz, Misty C.; Das, Nabanita; Gregoire, Thomas; Hamilton, Jessica; Hossain, Sakib; Johns, Tim; LeBlanc, Madison; Mack, Shanice; Norrington, Blake L.; Patrick, Alton; Polack, Garrett; Saba, Tamima; Sherif, Yasmeen; Sloneker, Melodie; Vahdatinia, Sepehr; Wheeler, Ashley
2023MPBu...50..196B    Download PDF

Broad-band photometric monitoring of the stony asteroid 2500 Alascattalo was carried out over three nights in 2023 February. We find a typical color of V–R = 0.44 ± 0.05 mag, which is in good agreement with expectations for S-class asteroids. We also report a rotation period of 2.751 ± 0.001 h and a V-band variability amplitude of 0.16 ± 0.02 mag, which are in excellent agreement with previously reported measurements.

Lightcurves and Rotation Periods of 111 Ate, 169 Zelia, 421 Zahringia, and 580 Selene
Pages 197-199
Pilcher, Frederick
2023MPBu...50..197P    Download PDF

Synodic rotation periods and amplitudes at their early 2023 oppositions are found for 111 Ate 22.068 ± 0.001 hours, 0.11 ± 0.01 magnitudes; 169 Zelia 14.539 ± 0.001 hours, 0.17 ± 0.01 magnitudes; 421 Zahringia 25.509 ± 0.002 hours, 0.14 ± 0.01 magnitudes; 580 Selene 9.494 ± 0.001 hours, 0.19 ± 0.01 magnitudes.

Photometry and Lightcurve Analysis of Two Mars-Crossing Asteroids: (106848) 2000 YP16 and (133090) 2003 MS9
Pages 200-201
Michimani, Jonatan; Lazzaro, Daniela; Monteiro, Filipe; Rondón, Eduardo; Arcoverde, Plícida; Evangelista-Santana, Marçal; Pereira, Weslley; Mesquita, Wesley; Corrêa, Tatiane; Souza, Roberto
2023MPBu...50..200M    Download PDF

Lightcurves and rotational periods for Mars-Crossing asteroids (106848) 2000 YP16 and (133090) 2003 MS9 were obtained at the Observatório Astronômico do Sertão de Itaparica (MPC code Y28, OASI) in 2021 January- February and October-December, respectively.

Lightcurve Analysis for Two Near-Earth Asteroids Observed in January 2023
Pages 202-205
Birtwhistle, Peter
2023MPBu...50..202B    Download PDF

Lightcurves and amplitudes for 2 small near-Earth asteroids observed from Great Shefford Observatory during close approaches in January 2023 are reported. Both are superfast rotators with periods shorter than 3 minutes, one with reliably detected tumbling rotation.

Lightcurve Analysis of Two Near-Earth Asteroids
Pages 206-207
Bacci, Paolo; Maestripieri, Martina
2023MPBu...50..206B    Download PDF

We report photometric analysis of two near-Earth asteroids observed during close approaches in 2023 March. For 2023 EY we found P=0.0281 ± 0.0001 h, amplitude of 0.59 mag; Results for 2023 DZ2 are P=0.1050 ± 0.0001 h, amplitude of 0.48 mag.

Asteroid Photometry and Lightcurve Analysis of 1037 Davidweilla, 1369 Ostanina, 1718 Namibia, 4221 Picasso, 4368 Pillmore, 4901 O’Briain, 6223-Dahl, and 7353 Kazuya
Pages 208-210
Farfán, Rafael González; de la Cuesta, Faustino García; Fernández, Javier Ruiz; Mañanes, Esteban Fernández; Ribes, Noelia Graciá; Carballo, Juan-Luis González; De Elías Cantalapiedra, Javier; Casal, Jesús Delgado; Alonso, E. Díez
2023MPBu...50..208F    Download PDF

Lightcurves for eight asteroids were measured from 2022 May to August, except for 6223 Dahal, which was observed in 2021 November. Subsequent analysis found periods of: 1037 Davidweilla (4.508 h); 1369 Ostanina (8.392 h); 1718 Namibia (8.594 h); 4221 Picasso (3.111 h); 4368 Pillmore (3.605 h); 4901 O’Briain (2.650 h); 6223 Dahl (3.334 h); and 7353 Kazuya (6.387 h).

Lightcurves for Ten Minor Planets
Pages 211-214
Polakis, Tom
2023MPBu...50..211P    Download PDF

Photometric measurements were made for 10 main-belt asteroids, based on CCD observations made from 2023 January through 2023 February. Phased lightcurves were created for seven asteroids, while three did not yield period solutions. All the data have been submitted to the ALCDEF database.

Lightcurve Analysis for Four Main Belt Asteroids
Pages 215-216
Casalnuovo, Giovanni Battista
2023MPBu...50..215C    Download PDF

Photometric observations of four main-belt asteroids, 2384 Schulhof, 7468 Anfimov, (42790) 1998 XS93, and (53090) 1998 YS7, were made at the Filzi School Observatory (Laives - Italy) MPC code D12.

Asteroid Lightcurve Analysis at the Center for Solar System Studies Palmer Divide Station: 2023 January-February
Pages 217-221
Warner, Brian D.
2023MPBu...50..217W    Download PDF

CCD photometric observations of twelve asteroids were made at the Center for Solar System Studies Palmer Divide Station during 2023 January and February. Data analysis found a weak to moderate secondary period for the Hilda asteroids 1268 Libya and 2312 Duboshin, both possibly as sign of (unexpected) tumbling, the NEA (68359) 2001 IZ13 presents an unusual lightcurve with a very large amplitude of ~1.8 mag, and that NEA (98943) 2001 CC21 is a probable tumbler.

Lightcurves of Nine Asteroids
Pages 223-227
Dose, Eric V.
2023MPBu...50..223D    Download PDF

We present lightcurves and synodic rotation periods for nine asteroids. A trimodal interpretation is proposed for the lightcurve of Hungaria-family 4142 Dersu-Uzala.

Collaborative Asteroid Photometry from UAI: 2023 January-March
Pages 228-232
Franco, Lorenzo; Marchini, Alessandro; Papini, Riccardo; Iozzi, Marco; Scarfi, Giulio; Galli, Gianni; Fini, Paolo; Betti, Guido; Coffano, Alessandro; Marinello, Wladimiro; Bacci, Paolo; Maestripieri, Martina; Ruocco, Nello; Mortari, Fabio; Gabellini, Davide; Baj, Giorgio; Lombardo, Matteo; Aceti, Pietro; Banfi, Massimo; Tinelli, Luciano
2023MPBu...50..228F    Download PDF

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

Rotational Period and Lightcurve Determination for Five Minor Planets
Pages 232-234
Wiles, Mike
2023MPBu...50..232W    Download PDF

Photometric measurements of CMOS observations for five main-belt asteroids were made from 2022 December through 2023 February. Phased lightcurves were created for each one. Three of the asteroids have no prior published period solutions. All the data have been submitted to the ALCDEF database.

Asteroid Photometry and Lightcurve Analysis for Eight Asteroids
Pages 235-238
Colazo, Milagros; Fornari, César; Ciancia, Giuseppe; Scotta, Damián; Morales, Mario; Melia, Raúl; Wilberger, Aldo; Suárez, Néstor; Monteleone, Bruno; García, Alberto; Anzola, Marcos; Santos, Francisco; Mottino, Aldo; Colazo, Carlos
2023MPBu...50..235C    Download PDF

Synodic rotation periods and amplitudes are reported for 244 Sita, 329 Svea, 421 Zahringia, 904 Rockefellia, 2479 Sodankyla, 4373 Crespo, (143947) 2003 YQ117, and 2015 RN35.

Rotation Period Determination for Asteroid 2023 DZ2
Pages 238
Sioulas, Nick
2023MPBu...50..238S    Download PDF

Photometry of near-Earth asteroid 2023 DZ2 were conducted from the NOAK Observatory, located in Greece, to determine its synodic rotation period. The results are: P = 0.1046 ± 0.0035 h, A = 0.64 mag.

General Report of Position Observations by the ALPO Minor Planets Section for the Year 2022
Pages 239-240
Pilcher, Frederick
2023MPBu...50..239P    Download PDF

Observations of positions of minor planets by members of the Minor Planets Section in calendar year 2022 are summarized.

Lightcurve Photometry Opportunities: 2023 July-September
Pages 240-244
Warner, Brian D.; Harris, Alan W.; Durech, Josef; Benner, Lance A.M.
2023MPBu...50..240W    Download PDF

We present lists of asteroid photometry opportunities for objects reaching a favorable apparition and have no or poorly-defined lightcurve parameters. Additional data on these objects will help with shape and spin axis modeling using lightcurve inversion. We have changed the presentation of the “Radar-Optical Opportunities” section to include a list of potential radar targets as well as some that are in critical need of astrometric data and, if found, might also be targets for radar. These can have ephemeris errors on the order of tens to thousands of arcseconds and, despite the current surveys, have not been observed for several years. This makes them a double challenge: first to be found and, second, to determine astrometric positions and photometric properties.

In This Issue
Pages 245
Warner, Brian D.
2023MPBu...50..245W    Download PDF

This list gives those asteroids in this issue for which physical observations (excluding astrometric only) were made. This includes lightcurves, color index, and H-G determinations, etc. In some cases, no specific results are reported due to a lack of or poor quality data. The page number is for the first page of the paper mentioning the asteroid. EP is the "go to page" value in the electronic version.

copyright©2017-2022 Brian D. Warner. Funding to support this web site was provided by NASA grant NSSC 80NSSC18K0851 prior to 2021 April.