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 46-2)

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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 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 47-2 (2020 Apr-Jun)
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Show abstracts

Lightcurve Based Rotational Period Determination for Asteroids 2070 Humason and 3122 Florence
Pages 89-90
Núñez-López, Ramona; Loera-González, Pablo; Saucedo, Julio C.; Olguín, Lorenzo; Contreras, Maria Eugenia
2020MPBu...47...89N    Download PDF

We report photometric analysis of two asteroids observed at the Carl Sagan Observatory (OCS in Spanish) of the Universidad de Sonora in Hermosillo, Sonora, México. For 2070 Humason, our derived intrinsic rotation period is P = 3.18851 ± 0.00032 h and A = 0.14 mag. For 3122 Florence, our derived intrinsic rotation period is P = 2.3589 ± 0.0005 h and A = 0.24 mag. In both cases, we found good agreement with previously reported values.

Lightcurve-Based Period Determination for Apollo PHA (162082) 1998 HL1
Pages 91
Loera-González, Pablo; Olguín, Lorenzo; Saucedo-Morales, Julio; Domínguez-González, Rafael
2020MPBu...47...91L    Download PDF

Asteroid (162082) 1998 HL1 was observed during October 2019 at the Observatorio Estelar Carl Sagan from the Universidad de Sonora. Photometric data were collected during two nights that showed a period P = 7.587 ± 0.006 h and amplitude of A= 0.11 ± 0.03 mags.

Rotation Period and Amplitude Determination of (18172) 2000 Ql7: A Fast Rotator
Pages 92-93
Kluwak, Tomasz
2020MPBu...47...92K    Download PDF

Photometric observations of (18172) 2000 QL7, a fast rotator Amor/Mars-crosser asteroid, were made over three consecutive nights: 2019 October 29 through November 1. A synodic rotation period of 2.3767 ± 0.0005 h and lightcurve amplitude of 0.11 ± 0.01 mag were determined. The result significantly differs from the one published by Warner and Stephens (2020). Additional observations were made in January 2020. Initial results have been examined and confirmed.

Photometric Observations of Twenty-Three Minor Planets
Pages 94-101
Polakis, Tom
2020MPBu...47...94P    Download PDF

Phased lightcurves and synodic rotation periods for 23 main-belt asteroids are presented, based on CCD observations made from 2019 September through 2019 November. All the data have been submitted to the ALCDEF database.

Lightcurve Analysis of Long-period Minor Planet 2580 Smilevskia
Pages 101-103
Polakis, Tom; Skiff, Brian
2020MPBu...47..101P    Download PDF

2580 Smilevskia is a main-belt asteroid with no prior rotational period determinations. Data were acquired from two observatories spanning five weeks near a perihelic opposition. A synodic rotation period of 658.4 ± 1.2 h was computed. Data have been submitted to the ALCDEF database.

Lightcurve and Period of the NEA PHA 2019 GT3
Pages 103-104
Carbognani, Albino; Holmes, Robert; Buzzi, Luca
2020MPBu...47..103C    Download PDF

The authors report on the results of photometric observations of near-Earth asteroid (NEA) 2019 GT3. The most probable synodic rotation period is 0.73 ± 0.03 h with an amplitude of 1.3 ± 0.2 mag. The body appears to be rather elongated with a lower limit a/b . 1.4 ± 0.3 (if S-type) and strength-bound.

Near-Earth Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2019 September - 2020 January
Pages 105-120
Warner, Brian D.; Stephens, Robert D.
2020MPBu...47..105W    Download PDF

Lightcurves for 33 near-Earth asteroids (NEAs) obtained at the Center for Solar System Studies (CS3) from 2019 September to early 2020 January were analyzed for rotation period, peak-to-peak amplitude, and signs of satellites or tumbling. Some objects are good candidates for being members of the class of very wide binary asteroids. Others show signs of being “ordinary” binary asteroids, while others proved to be difficult to categorize as one or the other or if their behavior was due to tumbling. There were few easy answers.

Spin-Shape Model for 33 Polyhymnia
Pages 120-122
Franco, Lorenzo; Pilcher, Frederick; Ferrero, Andrea; Maurice, Audejean
2020MPBu...47..120F    Download PDF

We present a shape and spin axis model for main-belt asteroid 33 Polyhymnia. The model was achieved with the lightcurve inversion process, using combined dense photometric data acquired from five apparitions, between 2008-2019 and sparse data from USNO Flagstaff. Analysis of the resulting data found a sidereal period P = 18.60888 ± 0.00029 hours and two mirrored pole solutions at (λ = 19°, β = -65°) and (λ = 185°, β = -61°) with an uncertainty of ± 15 degrees.

Call for Observations
Pages 122
Pilcher, Frederick
2020MPBu...47..122P    Download PDF

Observers who have made visual, photographic, or CCD measurements of positions of minor planets in calendar year 2019 are encouraged to report them to this author on or before 2020 April 1. This will be the deadline for receipt of reports, for which results can be included in the "General Report of Position Observations for 2019," to be published in MPB Vol. 47, No. 3.

Lightcurve Analysis Of Hilda Asteroids At The Center for Solar System Studies: 2019 November
Pages 123-124
Warner, Brian D.; Stephens, Robert D.
2020MPBu...47..123W    Download PDF

CCD photometric observations of three Hilda asteroids were made at the Center for Solar System Studies (CS3) in 2019 November to provide additional lightcurves for modeling.

Main-Belt Asteroids Observed from CS3: 2019 October to December
Pages 125-133
Stephens, Robert D.; Warner, Brian D.
2020MPBu...47..125S    Download PDF

CD photometric observations of 21 main-belt asteroids were obtained at the Center for Solar System Studies (CS3) from 2019 October to December.

Lightcurves and Rotation Periods of 10 Hygiea, 47 Aglaja, 455 Bruchsalia, 463 Lola, and 576 Emanuela
Pages 133-135
Pilcher, Frederick
2020MPBu...47..133P    Download PDF

Synodic rotation periods and amplitudes are found for 10 Hygiea 13.828 ± 0.001 h, 0.23 ± 0.01 magnitudes with one maximum and minimum per rotational cycle; 47 Aglaja 13.173 ± 0.001 h, 0.21 ± 0.02 magnitudes; 455 Bruchsalia 11.839 ± 0.001 h, 0.50 ± 0.03 magnitudes; 463 Lola 6.2071 ± 0.0001 h, maximum amplitude 0.50 ± 0.03 magnitudes; 576 Emanuela 20.372 ± 0.001 h, 0.12 ± 0.01 magnitudes.

Lightcurve Analysis of Near-Earth Asteroids in 2017 from BMO and JBL
Pages 136-140
Oey, Julian
2020MPBu...47..136O    Download PDF

Photometric observations of a selection of Near-Earth Asteroids were done from Blue Mountains Observatory (BMO), JBL Observatory (JBL). The observations were made during the favorable apparition for each asteroid. Most of these objects were selected from The Asteroid Lightcurve Database and the data was collected using multiple instruments across Australia.

Rotation Period Determination for Asteroid 8323 Krimigis
Pages 141
Casalnuovo, Giovanni Battista; Chinaglia, Benedetto
2020MPBu...47..141C    Download PDF

Photometric observations of main-belt asteroid 8323 Krimigis were made at the Filzi School Observatory (Laives - Italy). Results of lightcurve analysis are presented.

2000 Herschel: A Tumbling Asteroid
Pages 142-143
Pilcher, Frederick; Franco, Lorenzo; Balzaretto Observatory (A81) Gao, Xing; Marchini, Alessandro; Papini, Riccardo; Tan, Hanjie
2020MPBu...47..142P    Download PDF

Minor planet 2000 Herschel is tumbling with a principal period of 133.6 h. A secondary period of 344 h is suggested, although other secondary periods are possible. The maximum amplitude is 1.1 magnitudes.

Collaborative Asteroid Photometry from UAI: 2019 October-December
Pages 144-147
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
2020MPBu...47..144F    Download PDF

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.

Lightcurves of Seven Main-Belt Asteroids
Pages 147-148
Ferrero, Andrea; Bonamico, Roberto
2020MPBu...47..147F    Download PDF

CCD photometric observations of seven main-belt asteroids were made from 2019 CCD photometric observations of seven main-belt asteroids were made from 2019 October-December. We report on the results of lightcurve analysis for 2634 James Bradley, 3171 Wangshoguang, 3662 Dezhnev, 3819 Robinson, 4686 Maisica, (7397) 1986 QS, and (51149) 2000 HF52.

The Rotation Rates of Three Near-Earth Asteroids and a Mars-Crossing Asteroid
Pages 149-150
Díaz-Vachier, Ian; Cotto-Figueroa, Desireé
2020MPBu...47..149D    Download PDF

Photometric observations of three near-Earth asteroids (NEAs) and a Mars-crossing asteroid (MCA) were performed during 2017 October 18 to October 22. Fourier analysis of the four targets yielded rotation periods of: 3.494 ± 0.034 h for 3361 Orpheus, 6.653 ± 0.008 h for 1990 UQ, 5.491 ± 0.003 h for 1999 RT198 and 5.319 ± 0.002 h for 1998 ST4.

Photometry of 2729 Urumqi at the Xingming Observatory in Urumqi City
Pages 151
Gao, Xing; Tan, Hanjie
2020MPBu...47..151G    Download PDF

Lightcurve photometry observations of the main-belt asteroid 2729 Urumqi were made at Xingming Observatory in 2019 December. We find that the asteroid has a synodic rotation period of 3.127 ± 0.001 h and amplitude of 0.22 ± 0.01 mag. Multi-band photometric sessions shows the mean color indices of gr = 0.67 ± 0.02, and r-i = 0.20 ± 0.02 mag. According to these color indices, 2729 Urumqi can be classified as a type S asteroid.

The Rotation Periods of the Asteroids 587 Hypsipyle, 1152 Pawona, and 2937 Gibbs
Pages 152-153
Aimar, Fabrizio; Kossuth, Corso; Ghio, Giorgio
2020MPBu...47..152A    Download PDF

We present photometric synodic rotation periods for the asteroids 2937 Gibbs (P=2.983 ± 0.001 h and a possible P2=5.626 ± 0.001 h), 1152 Pawona (P=3.4151 ± 0.0003 h), and 587 Hypsipyle (P=2.8881 ± 0.0005 h).

Rotational Periods and Lightcurves of 2051 Chang, 3171 Wangshouguan, 8141 Nikolaev, and 10426 Charlierouse
Pages 154-156
Noschese, Alfonso; Mollica, Maurizio; Catapano, Antonio; Vecchione, Antonio
2020MPBu...47..154N    Download PDF

A summary of the lightcurves and rotation period determinations for 2051 Chang, 3171 Wangshouguan, 8141 Nikolaev and 10426 Charlierouse from 2019 October to 2020 January is presented in this paper.

Lightcurve Photometry Opportunities: 2020 April-June
Pages 156-161
Warner, Brian D.; Harris, Alan W.; Durech, Josef; Benner, Lance A.M
2020MPBu...47..156W    Download PDF

We present lists of asteroid photometry opportunities for objects reaching a favorable apparition and having either none or poorly-defined lightcurve parameters. Additional data on these objects will help with shape and spin axis modeling via lightcurve inversion. We also include lists of objects that will be the target of radar observations. Lightcurves for these objects can help constrain pole solutions and/or remove rotation period ambiguities that might not come from using radar data alone.

In This Issue
Pages 162
Warner, Brian D.
2020MPBu...47..162W    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 Brian D. Warner. Funding to support this web site is provided by NASA grant NSSC 80NSSC18K0851