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The Minor Planet Observer
and
Palmer Divide Observatory

7187 Isobe (2011)

MPC Designation: 1992 BW
Lightcurves Period (h): 4.2432 ± 0.0005
Amplitude (mag): 0.12 ± 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: 241
Discovered: 1992-01-30  Palomar  E. F. Helin
Family/Group: Hungaria
Taxonomic Class: ES (Assumed)
Published: MPB 38, 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)

Data from 2004 and 2007 also show a weak secondary period of P ~ 16.3 h. No mutual events were seen but the suspicion is that the secondary period is due to a satellite.

 

Contents © 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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