CCD photometric observations of 9 asteroids were obtained from the Center for Solar System Studies from 2016 January to March.
CCD photometric observations of 9 asteroids were obtained from the Center for Solar System Studies from 2016 January to March.
CCD photometry observations made in 2015 October and November of the Vestoid asteroid 5425 Vojtech showed it to be binary. The primary lightcurve has a period of 2.64759 ± 0.000004 h and an amplitude 0.27 ± 0.02 mag. The orbital period of the satellite is 25.43 ± 0.02 h. Based on mutual events ranging from 0.05 to 0.09 mag, the estimated effective diameter ratio of the two bodies is Ds/Dp ≥ 0.22 ± 0.02.
The near-Earth asteroid 2015 TB145 made a fly-by of Earth in 2015 October. We observed the NEA in support of radar observations planned for late October. Our data set of more than 1200 data points obtained from October 19-31 led to a solution of P = 2.938 ± 0.002 h and A = 0.13 ± 0.02 mag.
Lightcurves for 5 asteroids were obtained from the Center for Solar System Studies from 2015 October to December.
Lightcurves for 36 near-Earth asteroids (NEAs) were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2015 October-December.
Lightcurves for 14 main-belt asteroids were obtained at the Center for Solar System Studies-Palmer Divide Station (CS3-PDS) from 2015 October-December.
The Hungaria asteroid 7958 Leakey is a known binary (Warner et al., 2012). It was observed in 2015 to confirm and refine the original periods for the primary rotation and satellite orbit. The analysis of the 2015 data found a noticeably different orbital period. We report on the analysis of the new data and a second look at the data from 2012.
Analysis of CCD photometric observations of the near-Earth asteroid (53110) 1999 AR7 made in 2015 December show it to be a binary system with a primary period of 2.7375 ± 0.0005 h and orbital period of 31.31 ± 0.02 h. The depth of the secondary mutual event indicates a minimum effective diameter ratio (Ds/Dp) of 0.41 ± 0.02.
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.
[This corrects the article PMC7244009.].
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