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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Derald D. Nye
Minor Planet Bulletin
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Issue 41-4 (2014 Oct-Dec)
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Lightcurve Analysis for 4167 Riemann
Pages 203
Zhao, Amy; Aggarwal, Ashok; Odden, Caroline
2014MPBu...41..203Z    Download PDF

Photometric observations of 4167 Riemann were made over six nights in 2014 April. A synodic period of P = 4.060 ± 0.001 hours was derived from the data.

Rotation Period Determination for 308 Polyxo
Pages 204
Pilcher, Frederick; Strabla, Luca Pietro; Quadri, Ulisse; Girelli, Roberto
2014MPBu...41..204P    Download PDF

Lightcurves of 308 Polyxo were obtained by a collaboration between Bassano Bresciano Observatory and Organ Mesa Observatory. For 308 Polyxo the period is 12.029 ± 0.001 hours, amplitude 0.15 ± 0.02 magnitudes with an irregular lightcurve.

Another Asteroid with a Changing Lightcurve: 232 Russia
Pages 205
Pilcher, Frederick
2014MPBu...41..205P    Download PDF

During its early 2014 apparition the lightcurve shape and inferred synodic rotation period for 232 Russia changed considerably. The best fit to data in the entire interval 2014 Mar. 25 - May 25 is with a lightcurve with a period 21.905 ± 0.001 hours, amplitude 0.14 ± 0.01 magnitudes.

Lightcurves for Inversion Model Candidates
Pages 206-208
Klinglesmith, Daniel A. III; Hanowell, Jesse; Warren, Curtis Alan
2014MPBu...41..206K    Download PDF

We present lightcurves for four inversion model candidate asteroids that will benefit from additional data at another phase angle bisector phase angle. We obtained synodic periods for each asteroid that were within ±0.002 h. Most have lightcurves that differed from previously published lightcurves in both amplitude and shape.

Rotation Period Determination for 299 Thora
Pages 209-210
Pilcher, Frederick; Alvarez, Eduardo Manuel; Pravec, Petr
2014MPBu...41..209P    Download PDF

This is the first comprehensive photometric investigation ever made of 299 Thora. We find a synodic rotation period 273.6 ± 0.2 hours, amplitude 0.39 magnitudes. Inaccuracies in calibration star magnitudes and possible changes in the shape of the lightcurve through the two months of observation prevent finding any possible tumbling behavior.

Trojan Asteroids Observed from CS3: 2014 January-May
Pages 210-212
Stephens, Robert D.; Coley, Daniel R.; French, Linda M.
2014MPBu...41..210S    Download PDF

Lightcurves for eight Jupiter Trojan asteroids were obtained from the Center for Solar System Studies from 2014 January to May.

Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 March-June
Pages 213-224
Warner, Brian D.
2014MPBu...41..213W    Download PDF

Lightcurves for 38 near-Earth asteroids (NEAs) were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2014 March through June.

Lightcurve Analysis of the NEA Binary Asteroid 5381 Sekhmet
Pages 224-226
Warner, Brian D.; Harris, Alan W.
2014MPBu...41..224W    Download PDF

Radar observations in 2003 (Nolan et al., 2003) showed that the near-Earth asteroid (NEA) 5381 Sekhmet was a binary. CCD photometry observations made from the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) during the 2014 apparition confirmed the discovery and found the first precise values for the primary rotation period, P1 = 2.8233 ± 0.0001 h, and the orbital period of the satellite, P_ORB = 12.379 ± 0.004 h. The estimated effective size ratio of the two bodies is Ds/Dp = 0.25 ± 0.02, which is in good agreement with the sizes estimated by radar.

Asteroids Observed from CS3: 2014 April-June
Pages 226-230
Stephens, Robert D.
2014MPBu...41..226S    Download PDF

CCD photometric observations of 14 asteroids were obtained from the Center for Solar System Studies from 2014 April to June.

Rotation Period, Spin Axis, and Shape Model for Main-belt Asteroid 92 Undina
Pages 230-233
Warner, Brian D.
2014MPBu...41..230W    Download PDF

CCD photometry observations of 92 Undina in 2014 April found a synodic rotation period of 15.933 ± 0.002 h and lightcurve amplitude of 0.16 ± 0.01 mag. An attempt was made to model the spin axis and shape for the asteroid using a combination of dense lightcurves from three apparitions and sparse data from two survey programs. The results were inconclusive other than to indicate that the pole latitude is not far removed from the ecliptic plane and rotation is probably retrograde.

Rotation Period of 227 Philosophia is Re-evaluated
Pages 233-234
Pilcher, Frederick; Alkema, Michael S.
2014MPBu...41..233P    Download PDF

We previously published a rotation period of 52.98 hours for 227 Philosophia (Pilcher and Alkema, 2014, Minor Planet Bulletin 41, 188). By adjusting instrumental magnitudes of the observations reported there by 0.03 or less, we obtain equally good fits to 26.476 hours with a monomodal lightcurve and 52.955 hours with a bimodal lightcurve, amplitude 0.12 magnitudes. We prefer the shorter period because the two sides of the longer period lightcurve are nearly identical.

Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2014 March-June
Pages 235-241
Warner, Brian D.
2014MPBu...41..235W    Download PDF

Lightcurves for 19 main-belt asteroids were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2014 March through June. Some of the objects were members of the Hungaria group/family, observed as follow-up to previous apparitions to check for the possibility of undiscovered satellites or to provide additional data for spin axis and shape modeling.

Asteroid Lightcurves from Altimira Observatory
Pages 241-243
Buchheim, Robert K.
2014MPBu...41..241B    Download PDF

The following asteroid lightcurve synodic periods are reported: 502 Sigune (P = 10.929 ± 0.02 h); 781 Kartvelia (P = 19.04 ± 0.02 h); 828 Lindemannia (P = 20.52 ± 0.02 h); and 3322 Lidiya (P = 710 ± 10 h).

Rotational Period for 1658 Innes, (10597) 1995 TR10, and 30017 Shaundatta
Pages 243-244
Franco, Lorenzo; Papini, Riccardo
2014MPBu...41..243F    Download PDF

Photometric observations of three main-belt asteroid were made over seven nights during 2014 April-June: 1658 Innes, (10597) 1996 TR10, and 30017 Shaundatta.

A Comprehensive Photometric Investigation of 185 Eunike
Pages 244-250
Pilcher, Frederick; Behrend, Raoul; Bernasconi, Laurent; Franco, Lorenzo; Hills, Kevin; Martin, Axel; Ruthroff, John C.
2014MPBu...41..244P    Download PDF

We have reevaluated our previous photometric data sets of 185 Eunike for oppositions in the years 2010, 2011, and 2012, respectively, and have obtained new observations in 2014 Jan. - May. For each of these four years we draw period spectra which show deep minima only near 21.8 hours and the double period near 43.6 hours, and plot lightcurves phased to near 21.8 and 43.6 hours, respectively. For observation sets in each of the four years we find the available parts of the lightcurves phased to 43.6 hours and separated by 1/2 cycle to be identical within errors of observations, and conclude that the double period is ruled out. For the new observations in the year 2014 we find best fit to a lightcurve phased to 21.812 ± 0.001 hours with amplitude 0.08 ± 0.01 magnitudes. The absolute magnitude and the opposition parameter are H = 7.45 ± 0.01, G = 0.11 ± 0.02. The V-R color index was determined to be 0.36 ± 0.03. Both the color index and G value are compatible with a low albedo asteroid. The diameter is estimated to be D = 175 ± 33 km. The lightcurve inversion analysis shows a preliminary sidereal period/pole solution at Ps = 21.80634 ± 0.00012 h and (136°, 4°), (314°, -18°), with an error estimation of ± 30 degrees.

Rotation Period Determiniations for 24 Themis, 65 Cybele, 108 Hecuba, 530 Turandot, and 749 Malzovia
Pages 250-252
Pilcher, Frederick
2014MPBu...41..250P    Download PDF

CCD photometric observations were made of five mainbelt asteroids: 24 Themis, 65 Cybele, 108 Hecuba, 530 Turnadot, and 749 Malzovia. These were used to determine the synodic rotation period of the asteroids and their lightcurve amplitudes. In the cases of 108 Hecuba and 530 Turnadot, the results were able to exclude some periods previously reported by other authors.

Rotation Periods and R Magnitudes of Three Koronis Family Members
Pages 252-254
Arredondo, Anicia; Hartt, Anne-Marie; Yazdi, Sormeh K.
2014MPBu...41..252A    Download PDF

We report synodic rotation periods for three Koronis family asteroids: 1443 Ruppina, 5.880 ± 0.001 h; 1848 Delvaux, 3.639 ± 0.001 h; and 2144 Marietta, 5.489 ± 0.001 h.

Period Determination for 398 Admete: the Lowest Numbered Asteroid with no Previously Known Period
Pages 254-255
Alvarez, Eduardo Manuel
2014MPBu...41..254A    Download PDF

Lightcurve analysis for 398 Admete was performed using observations during its 2014 opposition. The synodic rotation period was found to be 11.208 ± 0.001 h and the lightcurve amplitude was 0.13 ± 0.02 mag.

Rotational Period of Asteroid 12282 Crombecq
Pages 255
Franco, Lorenzo
2014MPBu...41..255F    Download PDF

Photometric observations of main-belt asteroid 12282 Crombecq were made over four nights in 2014 June. Lightcurve analysis shows a synodic period of 3.426 ± 0.001 h with an amplitude of 0.21 ± 0.04 mag.

An Updated Period Determination for 772 Tanete
Pages 256-257
Martinez, Luis E.; Ferrero, Andrea
2014MPBu...41..256M    Download PDF

CCD photometric observations of main-belt minor planet 772 Tanete were made during its favorable opposition from 2014 April-June. Analysis of the data found a synodic period of 17.258 ± 0.001 h.

Rotation Periods and Lightcurves for Six Near-Earth Asteroids
Pages 257-260
Benishek, Vladimir
2014MPBu...41..257B    Download PDF

The lightcurves and synodic rotation periods for six near-Earth asteroids observed in the period 2013 October to 2014 June are presented.

Rotation Period Determination for the Slow Rotator 3345 Tarkovskij
Pages 260-261
Benishek, Vladimir; Coley, Daniel R.
2014MPBu...41..260B    Download PDF

Photometric observations of the main-belt asteroid 3345 Tarkovskij conducted by the authors over more than three months from 2013 December to 2014 March revealed its slow rotation rate and a synodic rotation period of 187.0 ± 0.1 hours. The corresponding bimodal lightcurve has an amplitude of 0.59 ± 0.02 magnitudes.

Rotation Period Determination for 671 Carnegia
Pages 261-262
Benishek, Vladimir; Papini, Riccardo
2014MPBu...41..261B    Download PDF

Analysis of photometric observations of the main-belt asteroid 671 Carnegia from 2014 January-March revealed a bimodal lightcurve with a period of 8.332 ± 0.001 hours as the most likely solution. However, a trimodal solution of 12.50 hours still could not be formally ruled out.

Rotation Period Determination for the Main-belt Asteroid 1517 Beograd
Pages 263-264
Benishek, Vladimir; Pilcher, Frederick
2014MPBu...41..263B    Download PDF

New photometric data on the main-belt asteroid 1517 Beograd were obtained during the period 2014 March-May, covering a relatively wide range of phase angles. Analysis of the data indicates a synodic rotation period solution of 6.9490 ± 0.0006 h.

Asteroids Lightcurves at OAVdA: 2013 December - 2014 June
Pages 265-270
Carbognani, Albino
2014MPBu...41..265C    Download PDF

Twelve asteroids, main-belt (MBA) and near-Earth (NEA), were observed at OAVdA from 2013 December through 2014 June: 1678 Hveen, 2834 Christy Carol, 3744 Horn-d’Arturo, 7436 Kuroiwa, (21374) 1997 WS22, (53435) 1999 VM40, (143649) 2003 QQ47, (242708) 2005 UK1, (243566) 1995 SA, (251346) 2007 SJ, 2013 XY8, and 2014 CU13.

Target Asteroids! Observing Targets for 2014 October through December
Pages 270-273
Hergenrother, Carl; Hill, Dolores
2014MPBu...41..270H    Download PDF

Asteroids to be observed by the Target Asteroids! program during the period of October to December 2014 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 easier to observe for small telescope users and 2) analogous to (101955) Bennu, the target asteroid of the OSIRIS-REx sample return mission.

Lightcurve Analysis for Three Asteroids: 4000 Hipparchus, 5256 Farquhar, and 5931 Zhvanetskij
Pages 274-275
Odden, Caroline E.; Bond, J. Brooke; Aggarwal, Ashok K.; Seokjun, Yoon; Chapman, Kathryn J.; Fortin, Liam G.; He, David B.; Hurley, Cooper D.; Joli-Coeur, Laurent; Little, John; Neumann, A. Miles; Ortega, Marelene; Park, Ji Tae; Simard-Halm, Malina; Simon, Matthew I.; Taylor, Isabel O.; Zhu, Emily C.
2014MPBu...41..274O    Download PDF

Lightcurves for asteroids 4000 Hipparchus, 5256 Farquhar, and 5931 Zhvanetskij were obtained at the Phillips Academy Observatory (PAO) and HUT Observatory between 2013 October and 2014 March.

Lightcurve Analysis of Asteroids from Blue Mountains Observatory in 2013
Pages 276-281
Oey, Julian
2014MPBu...41..276O    Download PDF

Analysis of CCD photometric observations made in 2013 from Kingsgrove Observatory and Blue Mountains Observatory found the synodic rotation period for 30 asteroids.

Sidereal Photometric Astrometry as Efficient Initial Search for Spin Vector
Pages 282-284
Slivan, Stephen M.
2014MPBu...41..282S    Download PDF

I describe how to use the Sidereal Photometric Astrometry method of spin vector determination (Drummond et al., 1988) to identify the specific plausible candidate combinations of sidereal periods and pole solution regions that are consistent with a lightcurve epoch data set, to use as initial inputs to the convex inversion method of shape determination (Kaasalainen et al., 2001).

New Photometric Observations of the Binary Near-Earth Asteroid (137170) 1999 HF1
Pages 285-286
Sonka, Adrian Bruno; Popescu, Marcel; Nedeku, Dan Alin
2014MPBu...41..285S    Download PDF

Photometric observations of the binary near-Earth asteroid 1999 HF1 were made during 6 nights in the interval 2014 May 21 to June 18 using the Cassegrain telescope at the Bucharest Astronomical Institute (UAI code: 073). These observations confirm that the asteroid’s lightcurve has two components. The short period variation was estimated to P = 2.5662 ± 0.0034 h, close to the value 2.3191 hours found in the literature.

Lowell Observatory Near-Earth Asteroid Photometric Survey (NEAPS) - 2009 January through 2009 June
Pages 286-300
Koehn, Bruce W.; Bowell, Edward G.; Skiff, Brian A.; Sanborn, Jason J.; McLelland, Kyle P.; Pravec, Petr; Warner, Brian D.
2014MPBu...41..286K    Download PDF

We report the results of the Lowell Observatory Near- Earth Asteroid Photometric Survey (NEAPS) for the period between 2009-01-01 and 2009-06-30. During this period, we obtained our first photometric data for 40 asteroids including 433 Eros, 1943 Anteros, 3554 Amun, 5011 Ptah, (5604) 1992 FE, 5620 Jasonwheeler, (5693) 1993 EA, (8566) 1996 EN, (14402) 1991 DB, (16834) 1997 WU22, (22753) 1998 WT, (35107) 1991 VH, (52768) 1998 OR2, (68350) 2001 MK3, (85867) 1999 BY9, (138883) 2000 YL29, (141052) 2001 XR1, (143651) 2003 QO104, (154244) 2002 KL6, 161989 Cacus, (162385) 2000 BM19, (163758) 2003 OS13, (175706) 1996 FG3, (194386) 2001 VG5, (203217) 2001 FX9, (207945) 1991 JW, (208023) 1999 AQ10, (212546) 2006 SV19, (256412) 2007 BT2, 2001 FE90, 2004 LV3, 2005 BC, 2005 SG19, 2008 QT3, 2008 WL60, 2009 DE47, 2009 DO111, 2009 EP2, 2009 FD, and 2009 JM2. We also report our analysis of 5261 Eureka, a Mars Trojan.

Lightcurve Photometry Opportunities: 2014 October-December
Pages 301-304
Warner, Brian D.; Harris, Alan W.; Pravec, Petr; Durech, Josef; Benner, Lance A.M.
2014MPBu...41..301W    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.


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