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The Minor Planet Observer
and
Palmer Divide Observatory

5771 Somerville (2012)

MPC Designation: 1987 ST1
Lightcurves Period (h): 9.20 0.05
Amplitude (mag): 0.80 0.03
Equipment:

 

Filter: C
MagBand: V
Telescope: 0.35m f/9.1 SCT
Camera: SBIG STL-1001E
Exposure: 300

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2012-03-14 07:00  17.65    4.4  185.1   -9.3
2012-03-15 07:00  17.64    4.2  185.1   -9.3
2012-03-16 07:00  17.62    4.0  185.0   -9.4

Data Points: 120
Discovered: 1987-09-21  Anderson Mesa  E. Bowell
Family/Group: MB-Outer
Taxonomic Class: C (Assumed)
Published: MPB pending
NOTES: Unless otherwise stated, the "Reduced Magnitudes" in the plots are Cousins R, based on 2MASS to BVRI conversions (Warner, MPB 34, 113-119)

Target of opportunity. A period of 7.7 h cannot be formally excluded but a half-period solution strongly supports the 9.2 h solution.

 

Contents 2012 Brian D. Warner / Palmer Divide Observatory

 

 

 

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