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The Minor Planet Observer
and
Palmer Divide Observatory

903 Nealley (2011)

MPC Designation: 1918 EM
Lightcurves Period (h): 19.72 0.02
Amplitude (mag): 0.15 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
2011-08-09 07:00  14.36    2.8  312.5    6.5
2011-08-10 07:00  14.37    3.0  312.5    6.5
2011-08-11 07:00  14.39    3.2  312.5    6.4
2011-08-12 07:00  14.40    3.4  312.5    6.4
2011-08-16 07:00  14.47    4.5  312.4    6.2
2011-08-18 07:00  14.51    5.1  312.4    6.1
2011-08-24 07:00  14.62    6.9  312.4    5.9

Data Points: 160
Discovered: 1918-09-13  Vienna  J. Palisa
Family/Group: MB-Outer
Taxonomic Class: C?
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)

Follow up to 2004, when a period of 21.6 h was reported. The 2004 data fit a period of 19.61 h, closer to the one presented here.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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