PSABA - Minor Planet Photometry

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PSABA

Photometry > 2018
(21282) Shimizuyuka

The asteroid light curve was measured to be 5.216h
Followed the next month with a longer light curve of 5.276h, a margin of error that is not acceptable.
Attempt to confirm the correct light curve failed due to poor weather condition in the following month, dimming and change viewing geometry to polar aspect causing a considerable reduction in the lightcurve amplitude.
Shortening of the observing session also did not help.
(3865) Lindbloom

The PSABA asteroid has very low amplitude
Its light curve period is not well defined . The period recorded here is U=2
Period estimated at 3.57h
Pravec et al. (2018) found it at 5.42h at U=2
(10450) Girard

Asteroid is found to have a unique period of 4.1979h
(31450)_1999_CU9.PNG
MBA

PSABA
Absolute mag (H): 13.2 mag

Previous work done:
[Warner, B.D. (2016) Minor Planet Bull. 43, 57-65.]
4666 Dietz

primary gathered in May 2018
4666 Dietz

Previous apparition on 2011 and 2015 did not capture any events. However this is a prime suspect that turned out to show the existence of a second period which indicated a probable binary. This current third apparition where events were captured, confirmed that this asteroid is a binary.

Continuation of observations during June lunation still show the progression of the events evolution.
The current geometry at LPAB 350-0 and BPAB -22
2015 Geometry is LPAB 15 BPAB -22
2011 Geormetry LPAB 340 BPAB -25
Secondary orbital period of 33.1h

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