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The Minor Planet Observer
and
Palmer Divide Observatory

950 Ahrensa (2009)

MPC Designation: 1921 JP
Lightcurves Period (h): 202. 1.
Amplitude (mag): 0.40 0.03
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
2009-06-16 07:00  15.11   16.5  255.6   30.7
2009-06-21 07:00  15.16   17.0  255.8   30.7
2009-06-22 07:00  15.18   17.1  255.8   30.7
2009-06-23 07:00  15.19   17.3  255.9   30.7
2009-06-24 07:00  15.20   17.4  256.0   30.6
2009-07-07 07:00  15.41   19.4  257.0   30.1
2009-07-08 07:00  15.43   19.5  257.1   30.1
2009-07-09 07:00  15.44   19.7  257.2   30.0
2009-07-10 07:00  15.46   19.8  257.3   29.9
2009-07-11 07:00  15.48   20.0  257.4   29.9
2009-07-13 07:00  15.51   20.3  257.6   29.8
2009-07-14 07:00  15.53   20.4  257.7   29.7
2009-07-15 07:00  15.55   20.6  257.9   29.6
2009-07-16 07:00  15.57   20.7  258.0   29.6
2009-07-17 07:00  15.58   20.9  258.1   29.5
2009-07-18 07:00  15.60   21.0  258.2   29.4
2009-07-19 07:00  15.62   21.1  258.4   29.4
2009-07-23 07:00  15.69   21.7  259.0   29.1

Data Points: 823
Discovered: 1921-04-01  Heidelberg  K. Reinmuth
Family/Group: Phocaea
Taxonomic Class: Sa
Published: MPB 37, 24-27
NOTES: Unless otherwise stated, the "Reduced Magnitudes" in the plots are Cousins R, based on 2MASS to BVRI conversions (Warner, MPB 34, 113-119)

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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