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The Minor Planet Observer
and
Palmer Divide Observatory

1146 Biarmia (1999)

MPC Designation: 1929 JF
Lightcurves Period (h): 5.47 0.01
Amplitude (mag): 0.21 0.01
Equipment:

 

Filter: C
MagBand: R
Telescope: SCT 25cm f/6.5
Camera: ST-8
Exposure: 120

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
1999-09-22 06:00  13.72    6.7  357.9   13.3
1999-09-23 06:00  13.70    6.5  357.9   13.3
1999-10-01 06:00  13.63    6.1  357.9   12.7

Data Points: 71
Discovered: 1929-05-07  Simeis  G. N. Neujmin
Family/Group: MB-Outer
Taxonomic Class: X
Published: MPB 38, 21-23
NOTES: Unless otherwise stated, the "Reduced Magnitudes" in the plots are Cousins R, based on 2MASS to BVRI conversions (Warner, MPB 34, 113-119)

Originally reported in MPB 27, 4-6 with P = 11.514 and A = 0.32. Reanalysis found revised period of P = 5.33, which disagrees with the 5.47 found by Durkee. The curve above is plotted to the Durkee period, which does give a better fit than with 5.33 h.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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