Palmer Divide Observatory Lightcurve 7187 Isobe (2011)


Lightcurves

	7187 Isobe (2011)
	MPC Designation:	1992 BW
Lightcurves	Period (h):	4.2437 ą 0.0003
	Amplitude (mag):	0.13 ą 0.01
	Equipment:	Filter: C MagBand: R Telescope: 0.35m f/9.1 SCT Camera: SBIG STL-1001E Exposure: 240
	Obs. Details	Date E Mag Phase PABL PABB 2011-02-12 07:00 15.33 6.0 149.0 -6.9 2011-02-13 07:00 15.32 5.7 149.0 -7.1 2011-02-15 07:00 15.30 5.3 148.9 -7.5 2011-02-28 07:00 15.56 9.3 148.8 -9.8 2011-03-01 07:00 15.59 9.8 148.8 -9.9 2011-03-02 07:00 15.62 10.3 148.8 -10.1
	Data Points:	234

	Discovered:	1992-01-30 Palomar E. F. Helin
	Family/Group:	Hungaria
	Taxonomic Class:	ES (Assumed)
	Published:

	NOTES:	Unless otherwise stated, the "Reduced Magnitudes" in the plots are Cousins R, based on 2MASS to BVRI conversions (Warner, MPB 34, 113-119) Following initial analysis of 2012 data, those from 2004, 2007, and 2011 were again reviewed for the possibility of a satellite. The 2007 apparaition shows a very good possibility of a satellite with an orbital period of 31.98 h. The 2004 data give 31.79. The data from 2011 give a very marginal secondary solution.
	Contents Š 2012 Brian D. Warner / Palmer Divide Observatory

The Minor Planet Observer and Palmer Divide Observatory