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The Minor Planet Observer
and
Palmer Divide Observatory

9739 Powell (2009)

MPC Designation: 1987 SH7
Lightcurves Period (h): 16.66 ± 0.03
Amplitude (mag): 0.11 ± 0.01
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.5m f/8.1 R/C
Camera: FLI 1001E
Exposure: 240

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2009-11-26 07:00  16.22   18.0   89.6   13.1
2009-11-27 07:00  16.19   17.5   89.6   13.0
2009-11-28 07:00  16.17   17.0   89.7   12.9
2009-11-30 07:00  16.11   16.0   89.8   12.7
2009-12-01 07:00  16.09   15.5   89.9   12.5

Data Points: 420
Discovered: 1987-09-26  Palomar  C. S. Shoemaker
Family/Group: Hungaria
Taxonomic Class: C
Published: MPB 37, 57-64
NOTES: Unless otherwise stated, the "Reduced Magnitudes" in the plots are Cousins R, based on 2MASS to BVRI conversions (Warner, MPB 34, 113-119)

The original paper gave 16.7 ± 0.3 but the higher precision is justified. A period off 33.5 h cannot be formally excluded.

 

Contents © 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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