The Minor Planet Bulletin
BULLETIN OF THE MINOR PLANETS SECTION OF THE ASSOCIATION OF LUNAR AND PLANETARY OBSERVERS


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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:

Derald D. Nye
Minor Planet Bulletin
10385 E. Observatory Drive
Corona de Tucson, AZ 85641-2309


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Issue 40-4 (2013 Oct-Dec)
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Lightcurve Analysis of Extremely Close Near-Earth Asteroid - 2012 DA14
Pages 187-188
Elenin, Leonid; Molotov, Igor
2013MPBu...40..187E    Download PDF

In this paper we present one of the first lightcurves of near-Earth asteroid 2012 DA14. This is a very interesting near-Earth asteroid, which approached the Earth at a very close distance on Feb. 15 2013. From our measurements we find a rotational period of 9.485 ± 0.144 h with an amplitude of 1.79 mag.

Lightcurve Photometry, H-G Parameters and Estimated Diameter for 1412 Lagrula
Pages 188
Casalnuovo, Giovanni Battista
2013MPBu...40..188C    Download PDF

Photometric observations of main-belt asteroid 1412 Lagrula were made over ten nights during 2013 March and April, with filtered system. The resulting synodic period is 5.9176 ± 0.0001 h with an amplitude of 0.28 ± 0.05 mag. The color index V-R = 0.37 ± 0.05 mag. The measured absolute visual magnitude, Hv = 11.81 ± 0.04 mag. and the slope parameter, G = 0.135 ± 0.049, are consistent with a low albedo object, e.g., type C. The diameter is estimated to be D = 23 ± 3 km.

Rotation Period Determination for 26 Proserpina, 31 Euphrosyne, and 681 Gorgo
Pages 189
Pilcher, Frederick
2013MPBu...40..189P    Download PDF

Synodic rotation periods and amplitudes have been found for 26 Proserpina 13.109 ± 0.001 hours, 0.20 ± 0.01 mag. and 31 Euphrosyne 5.5293 ± 0.0001 hours, 0.10 ± 0.01 mag. Both results for these low numbered objects are consistent with previous findings. A new result for 681 Gorgo is a period of 6.4606 ± 0.0001 hours, amplitude 0.42 ± 0.02 mag.

Period Determination for 4527 Schoenberg
Pages 190
Burkhonov, O. A.; Ehgamberdiev, Sh. A.; Ergashev, K. E.
2013MPBu...40..190B    Download PDF

The main-belt asteroid 4527 Schoenberg (1982 OK) has been observed between June 28 and July 1, 2012 at Maidanak astronomical observatory of the Ulugh Beg Astronomical Institute (UBAI), Uzbekistan Academy of Sciences. On the basis of data analysis it is found a synodic rotation period of 2.6928„b0.0384 hour (0.1122±0.0016 day) and lightcurve amplitude of 0.31±0.05 mag.

Inversion Model Candidates
Pages 190-193
Klinglesmith III, Daniel A.; Hanowell, Jesse; Risley, Ethan; Turk, Janek; Vargas, Angelica; Warren, Curtis Alan
2013MPBu...40..190K    Download PDF

We present lightcurves for ten asteroids that were selected because they are potential candidates for lightcurve inversion modeling.

Rotational Period of Asteroid 6479 Leoconnolly
Pages 194
Franco, Lorenzo
2013MPBu...40..194F    Download PDF

Photometric observations of the main-belt asteroid 6479 Leoconnolly were made over two nights in 2013 April. Lightcurve analysis shows a synodic period of 5.11 ± 0.01 h with an amplitude of 0.75 ± 0.03 mag.

Rotation Period Determination for 730 Athanasia
Pages 194-195
Pilcher, Frederick
2013MPBu...40..194P    Download PDF

The synodic rotation period and amplitude have been found for 730 Athanasia 5.7345 ± 0.0002 hours, 0.14 ± 0.02 magnitudes, with a slightly unsymmetrical bimodal lightcurve. The period spectrum between 2.5 hours and 12.5 hours is presented, and the plausibility of all local minima in the period spectrum as potential alias periods is investigated.

Rotation Period Determination for 498 Tokio
Pages 196-197
Pilcher, Frederick; Martinez, Luis
2013MPBu...40..196P    Download PDF

For 498 Tokio a synodic rotation period of 41.85 ± 0.01 hours and amplitude 0.23 ± 0.02 magnitude have been found with CCD photometry.

Lightcurve for (152756) 1999 JV3
Pages 196
Stephens, Robert D.; French, Linda M.
2013MPBu...40..196S    Download PDF

CCD photometric observations of the Apollo asteroid (152756) 1999 JV3 were obtained from Lowell Observatory in May 2013. A synodic period of 2.845 ± 0.001 h with an amplitude of 0.32 ± 0.02 was found.

Rotational Period of Asteroid Francis
Pages 197
Franco, Lorenzo; Tomassini, Angelo; Scardella, Maurizio
2013MPBu...40..197F    Download PDF

Photometric observations of the main-belt asteroid 2050 Francis were made over three nights during 2013 May and June. Analysis shows a synodic period of 3.069 ± 0.001 h with an amplitude 0.20 ± 0.03 mag.

A Troop of Trojans: Photometry of 24 Jovian Trojan Asteroids
Pages 198-203
French, Linda M; Stephens, Robert, D.; Coley, Daniel R.; Wasserman, Lawrence H.; Vilas, Faith; La Rocca, Daniel
2013MPBu...40..198F    Download PDF

Lightcurves for 24 Jupiter Trojan asteroids were obtained from Cerro Tololo Inter-American Observatory, Lowell Observatory and the Center for Solar System Studies from September 2012 to May 2013.

A Plethora of Phocaea Asteroids
Pages 203-204
Stephens, Robert D.; Coley, Daniel R.
2013MPBu...40..203S    Download PDF

CCD photometric observations of three Phocaea family asteroids were obtained from the Center for Solar System Studies in 2013 June. 5040 Rabinowitz has a period of 4.691 ± 0.001 h and an amplitude of 0.35 ± 0.02 mag. while 6487 Tonyspear has a period of 74.91 ± 0.02 h and an amplitude of 1.24 ± 0.02 mag., and (70126) 1999 NT2 has a period of 5.41 ± 0.01 h and an amplitude of 0.83 ± 0.03 mag.

Lightcurve Photometry, H-G Parameters, and Estimated Diameter for 15621 Erikhovland
Pages 204-205
Casalnuovo, Giovanni Battista
2013MPBu...40..204C    Download PDF

Photometric observations of main-belt asteroid 15621 Erikhovland were made over seven nights during May and June 2013 with a filtered system. The resulting synodic period is 5.3426 ± 0.0001 h with a high amplitude of 0.81 ± 0.02 mag. The color index V-R = 0.33 ± 0.03 mag. The measured absolute visual magnitude, Hv = 12.14 ± 0.09 mag. and the slope parameter, G = 0.08 ± 0.09, are consistent with a low albedo object, e.g., type C. The diameter is estimated to be D = 20 ± 3 km.

Lightcurve of the Potentially Hazardous Asteroid (163249) 2002 GT
Pages 205
Franco, Lorenzo; Bacci, Paolo; Tesi, Luciano; Fagioli, Giancarlo
2013MPBu...40..205F    Download PDF

Photometric observations of the potentially hazardous asteroid (PHA) (163249) 2002 GT were made on 2013 June 16 and 17, before the object’s relatively close approach to the Earth. Analysis of the resulting data found a synodic period P = 3.77 ± 0.01 h with an amplitude A = 0.36 ± 0.03 mag.

Lightcurve of (4507) 1990 FV
Pages 206-207
Ito, Takashi; Yoshida, Fumi; Fukushima, Hideo; Sato, Hideo; Takahashi, Shigeru; Nakamura, Tsuko; Dermawan, Budi; Miyasaka, Seidai; Sato, Yusuke; Ip, Wing-Huen; Chen, Wen-Ping
2013MPBu...40..206I    Download PDF

We observed the main-belt asteroid (4507) 1990 FV from 2002 November to December at three observatories in eastern Asia. Its synodic rotation period turned out to be 6.58 ± 0.04 h and its lightcurve amplitude was 0.40 ± 0.03 mag when reduced to zero solar phase angle. Since our observations covered a relatively large solar phase angle range (2.3-13.7 degrees), we were able to make a phase curve to estimate the absolute magnitude (H) and slope parameter (G) in the R band: HR = 11.64 ± 0.02, GR = 0.19 ± 0.05.

Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2013 May-June
Pages 208-212
Warner, Brian D.
2013MPBu...40..208W    Download PDF

Lightcurves for eleven asteroids were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) in 2013 May and June. The asteroids were mostly a mix of Hungaria and Phocaea members along with some outer main-belt asteroids. New data failed to remove the existing rotation period ambiguity for the Hungaria asteroid 1355 Magoeba, although the number of possibilities may have been reduced. A new period is proposed for 4436 Ortizmoreno, 8.24 h (or 16.48 h), superseding the one reported by Birlan et al. (1996). The Hungaria member 26074 Carlwirtz may be a binary with a primary rotation period of P1 = 2.5493 ± 0.0003 h and a satellite orbital period of Porb = 16.11 ± 0.02 h. The Phocaea member (125742) 2001 XT117 shows signs of a low amplitude precision period, i.e., it is possibly in nonprincipal axis rotation (NPAR).

Photometric Study of Four Asteroids at Texas A&M Commerce Observatory
Pages 212-213
Montgomery, Kent A.; Davis, Cheri; Renshaw, Thomas; Rolen, Jacob
2013MPBu...40..212M    Download PDF

Lightcurves for four asteroids were measured at the Texas A&M University-Commerce Observatory from 2011 through 2013. The asteroids were: 1175 Margo, 2566 Kirghizia, 4106 Nada and (19977) 1989 TQ.

Asteroid Lightcurve Analysis at Elephant Head Observatory: 2013 April-July
Pages 215-216
Alkema, Michael S.
2013MPBu...40..215A    Download PDF

Four main-belt asteroids were observed from Elephant Head Observatory during 2013 April to July: 319 Leona, 806 Gyldenia, 814 Tauris, and 2448 Sholokhov.

Asteriod Lightcurve Analysis at the Palmer Divide Observatory: 2013 February-March. The Final Report.
Pages 217-220
Warner, Brian D.
2013MPBu...40..217W    Download PDF

Lightcurves for nine asteroids were obtained at the Palmer Divide Observatory (PDO) in 2013 February and March. These represent the final objects out of more than 1100 lightcurves measured at PDO over fourteen years. Of the nine objects reported here, six were Hungaria members, two were NEAs, and the remaining two were main belt members. Analysis of the data resulted in a revised rotation period for the Hungaria member 4531 Asaro. The near-Earth asteroid (5828) 1991 AM was found to be a possible binary system with an unusual lightcurve for the secondary period, while follow-up on known Hungaria binary 5899 Jedicke lead to a revised period for the primary and confirmation of the orbital period of the satellite.

One New and One Suspected Hungaria Binary Asteroid
Pages 221-223
Warner, Brian D.; Stephens, Robert D.
2013MPBu...40..221W    Download PDF

CCD photometry observations were made of two Hungaria asteroids in 2013 April and May. 4765 Wasserburg was found to be a previously undiscovered binary with a primary period of 3.6231 ± 0.0005 h and a satellite orbital period of 15.97 ± 0.02. What makes this a particularly interesting find is that the asteroid is one member of an asteroid pair (Vokrouhlický and Nesvorný 2008). The suspected Hungaria binary is (12390) 1994 WB1. Data from 2013 indicate the possibility of a satellite with an orbital period of 15.94 h and a primary rotation period of 2.462 h. However, analysis of data from 2008 does not show a satellite and found a period of 15.20 h. At best, 1994 WB1 is an “asteroid of interest.”

Photometry of Minor Planets. I. Rotation Periods from Lightcurve Analysis for Seven Main-belt Asteroids
Pages 224-229
Fauvaud, Stephane; Fauvaud, Marcel
2013MPBu...40..224F    Download PDF

CCD photometric measurements of the main-belt asteroids 417 Suevia, 453 Tea, 904 Rockefellia, 933 Susi, 1269 Rollandia, 1318 Nerina, and 1465 Autonoma were performed during the period 2010 August to 2012 March. The brightness amplitude and synodic rotation period of the composite lightcurves are presented and commented for each asteroid.

Lightcurve Inversion for 38 Leda
Pages 229-231
Franco, Lorezo; Pilcher, Frederick; Durech, Josef
2013MPBu...40..229F    Download PDF

We present shape and spin axis model for main-belt asteroid 38 Leda. The model was obtained with lightcurve inversion process, using combined dense photometric data from apparitions in 1979, 1995, 2000, 2008, 2009-10, 2011, 2012 and sparse data from USNO Flagstaff. Analysis of the resulting data found a sidereal period P = 12.836164 ± 0.000016 h and two possible pole solution at (lambda = 160°, beta = -17°) and (lambda = 343°, beta = -6°), with an error of ± 10 degrees. From sparse data from the USNO Flagstaff station we find H = 8.61 ± 0.04, G = 0.09 ± 0.04.

3 Asteroids' Lightcurve Analysis from Bassano Bresciano Observatory
Pages 232-233
Strabla, Luca; Quadri, Ulisse; Girelli, Roberto
2013MPBu...40..232S    Download PDF

Lightcurves for 3 minor planets were obtained at Bassano Bresciano Observatory from December 2012 to May 2012: 644 Cosima, 2038 Bistro, 2448 Sholokhlov.

Target Asteroids! Observing Targets for October through December 2013
Pages 233-235
Hergenrother, Carl; Hill, Dolores
2013MPBu...40..233H    Download PDF

Asteroids to be observed by the Target Asteroids! program during the period of July to September 2013 are presented. In addition to asteroids on the original Target Asteroids! list of easily accessible spacecraft targets, an effort has been made to identify other asteroids that are 1) brighter and, hence, easier to observe for small telescope users and 2) analogous to (101955) Bennu, the target asteroid of the OSIRIS-REx sample return mission.

Lightcurve Photometry Opportunities: 2013 October-December
Pages 236-240
Warner, Brian D.; Harris, Alan W.; Pravec, Petr; Durech, Josef; Benner, Lance A.M.
2013MPBu...40..236W    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 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.

Period Determination for the Slow Rotator 2546 Libitina
Pages 214
Alvarez, Eduardo Manuel
2013MPBu...40Q.214A    Download PDF

Period and amplitude results for asteroid 2546 Libitina were determined from observations during 2013. The synodic rotation period was found to be 132.71 ± 0.07 h and the lightcurve amplitude was 0.35 ± 0.03 mag.

Lightcurve of 3422 Reid Using Star Subtraction Techniques
Pages 214-215
Aznar, Amadeo
2013MPBu...40R.214A    Download PDF

Lightcurves measurements obtained in June 2013 for asteroid 3422 Reid suggest 2.91 ± 0.02 h as an update to the rotation period. The observed amplitude was 0.52 ± 0.05 mag. A significant reduction in the point-to-point scatter within the lightcurve was achieved when star subtraction were employed to eliminate the contaminating effects of background stars.

Corrigendum
Fauvaud, Stéphane, Fauvaud, Marcel
Photometry of Minor Planets, I.


copyright©2017 Brian D. Warner. Funding to support this web site is provided by NASA grant NSSC 80NSSC18K0851