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.

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Minor Planet Bulletin
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Issue 43-4 (2016 Oct-Dec)
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Lightcurves for Two Near-Earth Asteroids by Asteroids Observers (OBAS) - MPPD: 2016 April-May
Pages 283-284
Martinez, Vicente Mas; Silva, Gonzalo Fornas; Martinez, Angel Flores; Garceran, Alfonso Carreno; Mansego, Enrique Arce; Rodriguez, Pedro Brines; de Haro, Juan Lozano; Silva, Alvaro Fornas; Chiner, Onofre Rodrigo; Porta, David Herrero
2016MPBu...43..283M    Download PDF

We report on the results of photometric analysis of two near-Earth asteroids (NEA) by Asteroids Observers (OBAS). This work is part of the Minor Planet Photometric Database (MPPD) project initiated by a group of Spanish amateur astronomers. We have managed to obtain a number of accurate and complete lightcurves as well as some additional incomplete lightcurves to help analysis at future oppositions.

The Rotation Period of Asteroids 4931 Tomsk and 4232 Jordaens
Pages 284-285
Durkee, Russell I.; Houghton, J. L.; Eggleston, C. L.
2016MPBu...43..284D    Download PDF

CCD observations of two main-belt asteroids were made in 2016 March and May. Analysis of the data for 4931 Tomsk indicates a synodic period of P = 7.02 ± 0.01 h, A = 0.46 ± 0.10 mag. For 5232 Jordaens, the analysis indicates a synodic period of P = 10.58 ± 0.01 h, A = 0.73 ± 0.15 mag.

Lightcurve Analysis of NEA (331471) 1984 QY1: A Tumbling Asteroid
Pages 285-286
Warner, Brian D.; Benishek, Vladimir
2016MPBu...43..285W    Download PDF

Analysis of CCD photometric observations of the near- Earth asteroid (331471) 1984 QY1 show that it is likely in non-principal axis rotation (NPAR), or tumbling. A single period analysis found a dominant period of 45.5 ± 0.5 h, but the true periods of rotation and precession could not be determined.

Lightcurve Analysis of Asteroids Observed at the Oakley Southern Sky Observatory: 2015 December - 2016 April
Pages 287-289
Black, Sydney; Linville, Dylan; Michalik, Danielle; Wolf, Matthew; Ditteon, Richard
2016MPBu...43..287B    Download PDF

From 2015 December 12 to 2016 April 16, CCD images were taken with the goal of analyzing the photometric data on twenty-five asteroids: 507 Laodica, 1311 Knopfia, 1363 Herberta, 1454 Kalevala, 1480 Aunus, 1597 Laugier, 1714 Sy, 1791 Patsayev, 1911 Schubart, 2087 Kochera, 2179 Platzeck, 2660 Wasserman, 2828 Iku-Turso, 2854 Rawson, 3228 Pire, 3606 Pohjola, 3669 Vertinskij, 3812 Lidaksum, 3829 Gunma, 3840 Mimistrobell, 4640 Hara, 7016 Conandoyle, 8045 Kamiyama, (12551) 1998 QQ39, and (13388) 1999 AE6.

The B-V and V-R Color Indices on the Surface of NEA (214088) 2004 JN13
Pages 290-295
Carbognani, Albino
2016MPBu...43..290C    Download PDF

This paper presents the results of photometric observations with standard broad-band Bessel filters B, V, and R on near-Earth asteroid (214088) 2004 JN13. The analysis shows that the B-V and V-R color indices are fairly constant on the asteroid surface with mean values B-V = 0.83 ± 0.02 mag and V-R = 0.48 ± 0.03 mag, indicative of a relatively homogeneous surface color distribution. For a typical albedo, assuming these colors indicate an S-type asteroid, a mean diameter of 2.4 ± 0.5 km is inferred.

Three Asteroids with Changing Lightcurves: 124 Alkeste, 465 Alekto, and 569 Misa
Pages 296-299
Pilcher, Frederick
2016MPBu...43..296P    Download PDF

Synodic rotation periods and amplitudes are found for 124 Alkeste: P = 9.906 ± 0.001 h, A = 0.18-0.29 mag; 465 Alekto: P = 10.936 ± 0.001 h, A = 0.14-0.16 mag; and 569 Misa: P = 11.595 ± 0.001 h, A = 0.09 ± 0.01 mag. Changes in the shapes of the lightcurves in an interval of 40 to 60 days are documented. For 124 Alkeste, V-R = 0.49 and H = 8.155 ± 0.018, G = 0.137 ± 0.019.

Rotation Period Analysis for 3223 Forsius
Pages 299
Liu, Junda
2016MPBu...43..299L    Download PDF

Analysis of photometric observations for the minor planet 3223 Forsius shows a synodic rotation period of P = 2.3432 ± 0.0002 h with an amplitude A = 0.28 mag.

Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 April-July
Pages 300-304
Warner, Brian D.
2016MPBu...43..300W    Download PDF

Lightcurves for nine main-belt asteroids were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2016 April to July. Of the group, four are known Hungaria binary asteroids: 1727 Mette, 2047 Smetana, 5899 Jedicke, and (18890) 2000 EV26. The Mars-crosser (54697) 2001 FA70 appears to be a newly-confirmed binary with P1 = 2.7075 h and POrb = 16.269 h. A third period, P2 = 2.1239 h, appears to be real. If so, it could be due to the asynchronous rotation of the satellite or a third body in the system.

Rotation Determinations for 50 Virginia, 58 Concordia, 307 Nike, and 339 Dorothea
Pages 304-306
Pilcher, Frederick
2016MPBu...43..304P    Download PDF

Synodic rotation periods and amplitudes are found for 50 Virginia 14.320 ± 0.001 hours, amplitude 0.10 ± 0.01 magnitudes; 58 Concordia 9.895 ± 0.001 hours, 0.10 ± 0.01 magnitudes; 307 Nike 11.857 ± 0.001 hours, 0.20 ± 0.02 magnitudes; 339 Dorothea 5.9684 ± 0.0001 hours, 0.09 ± 0.01 magnitudes. Both 50 Virginia and 58 Concordia have irregular lightcurves.

Three Additional Candidates for the Group of Very Wide Binary Asteroids
Pages 306-309
Warner, Brian D.
2016MPBu...43..306W    Download PDF

The very wide binary asteroids (VWBA) are a subgroup of binary asteroids that exhibit very long primary periods and, mostly, short secondary periods that are similar to those of the primary of “normal” small binary asteroids. It is unlikely that confirming mutual events will be seen by photometric observations, mostly because the orbital periods of the assumed satellites will be on the order of days. This paper introduces three additional candidates for this subgroup: (215442) 2002 MQ3, 2009 EC, and 2016 BU13. All three are considered to be among the more convincing examples that such systems exist.

Lightcurve Analysis for Asteroids 895 Helio and 1108 Demeter
Pages 310
Polakis, Tom; Skiff, Brian A.
2016MPBu...43..310P    Download PDF

Photometric observations of asteroids 895 Helio and 1108 Demeter were conducted on six nights in 2016 June from Tempe, AZ. Synodic rotation periods are 9.391 ± 0.008 h for 895 Helio and 9.846 ± 0.008 h for 1108 Demeter.

Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2016 April-July
Pages 311-319
Warner, Brian D.
2016MPBu...43..311W    Download PDF

Lightcurves for 31 near-Earth asteroids (NEAs), obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2016 April-July, were analyzed for rotation period and signs of satellites or tumbling.

Rotation Period Determination of Four Main-belt Asteroids
Pages 320-321
Ferrero, Andrea
2016MPBu...43..320F    Download PDF

Observations of four main-belt asteroids (MBA) revealed the following rotation periods and lightcurve amplitudes: 3861 Lorenz, P = 11.91 ± 0.01 h, A = 0.28 mag; 6173 Jimwestphal P = 2.908 ± 0.001 h, A = 0.41 mag; 10259 Osipovyurij, P = 6.356 ± 0.001 h, A = 0.30 mag; 29470 Higgs, P = 36.31 ± 0.01 h, A = 0.48 mag.

The Rotation Period of 2408 Astapovich
Pages 321
Ferrero, Andrea
2016MPBu...43..321F    Download PDF

Analysis of observations of the main-belt asteroid 2408 Astapovich led to a synodic rotation period of 3.674 ± 0.001 h and lightcurve amplitude of 0.17 mag.

Asteroid 4962 Vecherka: A High-Amplitude Slow Rotator
Pages 321-322
Tomov, Dimitar; Kurtenkov, Alexander; Enimanev, Mihail; Teneva, Deana
2016MPBu...43..321T    Download PDF

We present nine nights of photometric observations of the main-belt asteroid 4962 Vecherka. Its amplitude during our observations was not less than 1.08 ± 0.02 mag. We estimated its synodic rotation period at 14 ± 2 d (336 ± 48 h), meaning that 4962 Vecherka is probably among a rare class of slowly rotating, highamplitude asteroids. A much longer observational campaign is required to calculate the period of rotation with a satisfactory accuracy.

Lightcurves of Jovian Trojan Asteroids from the Center for Solar System Studies: L4 Greek Camp and Spies
Pages 323-331
Stephens, Robert D.; Coley, Daniel R.; Warner, Brian D.; French, Linda, M.
2016MPBu...43..323S    Download PDF

Jovian Trojan asteroids larger than ~ 30 km were studied from the Center for Solar System Studies (CS3, MPC U81). Lightcurves for 30 Trojan asteroids in the L4 (Greek) cloud were between May and June 2016. These were mostly from the L4 “Greek” cloud, but several were L5 “Trojan” cloud lightcurves not previously published.

Eighteen Asteroids Lightcurves at Asteroides Observers (OBAS) - MPPD: 2016 March-May
Pages 332-336
Mansego, Enrique Arce; Rodriguez, Pedro Brines; de Haro, Juan Lozano; Chiner, Onofre Rodrigo; Silva, Alvaro Fornas; Porta, David Herrero; Martinez, Vicente Mas; Silva, Gonzalo Fornas; Garceran, Alfonso Carreno
2016MPBu...43..332M    Download PDF

We report on the analysis of photometric observations of 18 main-belt asteroids (MBA) done by Asteroides Observers (OBAS). This work is part of the Minor Planet Photometric Database program initiated by a group of Spanish amateur astronomers. We have managed to obtain a number of accurate and complete lightcurves as well as some additional incomplete lightcurves to help analysis at future oppositions.

Asteroids Observed from CS3: 2016 April - June
Pages 336-339
Stephens, Robert D.
2016MPBu...43..336S    Download PDF

CCD photometric observations of seven asteroids were obtained from the Center for Solar System Studies from 2016 April to June.

Lightcurves and Rotation Periods for 14 Asteroids
Pages 339-342
Benishek, Vladimir
2016MPBu...43..339B    Download PDF

CCD photometric observations of 14 asteroids were made between 2015 May and 2016 May. A review of the results of data analysis is presented.

Lightcurve Analysis of NEA (154244) 2002 KL6: A Potential New Binary Asteroid
Pages 343-344
Warner, Brian D.; Benishek, Vladimir; Ferrero, Andrea; Skiff, Brian A.
2016MPBu...43..343W    Download PDF

Analysis of CCD photometric observations of near-Earth asteroid (154244) 2002 KL6 indicate that it may be a binary system. The presumed primary has a synodic rotation period of 4.60869 ± 0.00005 h and lightcurve amplitude of 0.65 ± 0.03 mag. The presumed satellite has an orbital period of 24.05 ± 0.02 h and maximum lightcurve amplitude of 0.07 mag. The secondary lightcurve showed no mutual events and seems to indicate that the satellite’s rotation is tidally locked to its orbital period.

Synodic Rotation Period of 2656 Evenkia
Pages 344-346
Lang, Kim; Jacobsen, Jens; Kristensen, Leif Hugo; Larsen, Frank R.
2016MPBu...43..344L    Download PDF

The asteroid 2656 Evenkia was observed between 2016 March 20 and April 30. A synodic period of rotation of P = 7.0870 ± 0.0002 h and amplitude of A = 0.68 mag was found.

The Binary Nature of the Asteroid 2242 Balaton
Pages 346-348
Marchini, Alessandro; Bacci, Paolo; Carbognani, Albino; Franco, Lorenzo; Klinglesmith, Daniel A. III; Papini, Riccardo; Pravec, Petr; Pray, Donald P.; Salvaggio, F.
2016MPBu...43..346M    Download PDF

Initial observations of 2242 Balaton indicated a rotation period of about 2.8 hours with some attenuation events. Further observations and analysis showed that 2242 is a binary asteroid with a primary period of 2.7979 ± 0.0001 h and amplitude of 0.18 mag; the orbital period of the secondary is 12.96 ± 0.01 h. Mutual events that are 0.03 to 0.08 magnitude deep indicate a lower limit on the secondary-to-primary mean-diameter ratio of 0.25. From sparse photometric data we also derived H = 13.31 ± 0.05, G = 0.22 ± 0.04.

Lightcurve and Rotation Period Determination for 5318 Dientzenhofer and 9083 Ramboehm
Pages 348-349
Salvaggio, Fabio; Marchini, Alessandro; Papini, Riccardo
2016MPBu...43..348S    Download PDF

Photometric observations of the main-belt asteroids 5318 Dientzenhofer and 9083 Ramboehm were made in 2016 March and 2015 December, respectively. Analysis of the data found a bimodal lightcurve with a synodic rotation period of 8.062 ± 0.002 h for 5318 Dientzenhofer. A trimodal lightcurve with synodic period of 10.199 ± 0.004 h for 9083 Ramboehm was found to be the most likely solution.

Parameters of Rotation and Shapes of Main-belt Asteroids from APT Observatory Group: Second Quarter 2016
Pages 350-353
Aznar Macias, Amadeo
2016MPBu...43..350M    Download PDF

Using observations made during the second quarter of 2016, the rotation periods and the semi-axis a/b ratio of the projected shape for six main-belt asteroids were determined: 238 Hypatia, 1603 Neva, 1859 Kovalevskaya, 4170 Semmelweis, 3002 Delasalle, and (31013) 1996 DR.

Lightcurve and Rotation Period of Main-belt Asteroid 10259 Osiporvyurij
Pages 353-354
Alonso-Monsalve, Elba; Hoot, John E.
2016MPBu...43..353A    Download PDF

CCD photometric observations of main-belt asteroid 10259 Osiporvyurij were made over four nights in 2016 June and July. Fourier analysis rendered a synodic rotation period of 6.370 ± 0.004 h.

Target Asteroids! Observing Campaigns for October through December 2016
Pages 354-355
Hergenrother, Carl; Hill, Dolores
2016MPBu...43..354H    Download PDF

Asteroid campaigns to be conducted by the Target Asteroids! program during the October-December 2016 quarter are described. 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 easier to observe for small telescope users and 2) analogous to (101955) Bennu and (162173) Ryugu, targets of the OSIRIS-REx and Hayabusa-2 sample return missions.

Lightcurve Photometry Opportunities: 2016 October-December
Pages 356-361
Warner, Brian D.; Harris, Alan W.; Durech, Josef; Benner, Lance A.M.
2016MPBu...43..356W    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.

Index to Volume 43
Pages 362-364
Werner, Bob
2016MPBu...43..362W    Download PDF

Minor Planet Bulletin Volume 43 Index


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