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The Minor Planet Observer
and
Palmer Divide Observatory

4868 Knushevia (2011)

MPC Designation: 1989 UN2
Lightcurves Period (h): 4.717 0.001
Amplitude (mag): 0.12 0.01
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.35m f/9.1 SCT
Camera: FLI 1001E
Exposure: 300

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2011-10-22 07:00  16.22   11.3   37.3  -15.2
2011-10-23 07:00  16.22   11.1   37.3  -15.4
2011-10-24 07:00  16.21   10.9   37.3  -15.6
2011-10-31 07:00  16.22   10.7   37.2  -16.7

Data Points: 188
Discovered: 1989-10-27  Palomar  E. F. Helin
Family/Group: Hungaria
Taxonomic Class: ES (Assumed)
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 2009 and 2010. Collaboration with David Higgins (Hunters Hill Observatory, AUSTRALIA) and Petr Pravec (Astronomical Institute, CZECH REPUBLIC). The 2011 solution is ambiguous, with one near 3.4 h possible. The period from none of the three apparitions agrees with the other two. The reason is unknown, though tumbling might be one possibility.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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