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The Minor Planet Observer
and
Palmer Divide Observatory

20231 1997 YK (2005)

MPC Designation: 1997 YK
Lightcurves Period (h): ±
Amplitude (mag): >0.4 ±
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.5m f/8.1 R/C
Camera: FLI 1001E
Exposure: 180

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2005-09-27 04:00  16.10   28.7   38.6   23.6
2005-09-30 07:00  16.03   27.7   39.4   23.6
2005-10-01 04:00  16.01   27.4   39.6   23.5
2005-10-02 04:00  15.99   27.1   39.8   23.5
2005-10-03 07:00  15.97   26.7   40.1   23.5
2005-10-04 07:00  15.95   26.4   40.3   23.4
2005-10-07 07:00  15.88   25.4   40.9   23.3
2005-10-08 04:00  15.86   25.0   41.0   23.3
2005-10-13 04:00  15.76   23.2   41.9   23.0
2005-10-24 04:00  15.55   19.0   43.3   22.0

Data Points: 432
Discovered: 1997-12-18  Oizumi  T. Kobayashi
Family/Group: Hungaria
Taxonomic Class: ES
Published: MPB 36, 176-178
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 asteorid appears to be tumbling and the data set was too limited to make a reasonable period detemrination. The period was originally reported at 48.2 h (MPB 33, 39-41) but arbitrary zero point adjustments were used to force a solution.

 

Contents © 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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