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The Minor Planet Observer
and
Palmer Divide Observatory

1177 Gonnessia (2002)

MPC Designation: 1930 WA
Lightcurves Period (h): 82. 5.
Amplitude (mag): 0.25 0.10
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.5m f/8.1 R/C
Camera: FLI IMG-1001E
Exposure: 45

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2002-07-13 06:00  14.57    8.4  311.6   14.9
2002-07-14 06:00  14.55    8.2  311.6   15.0
2002-07-15 06:30  14.54    8.0  311.6   15.0
2002-07-16 06:00  14.53    7.8  311.6   15.1
2002-07-18 05:30  14.50    7.4  311.6   15.2

Data Points: 205
Discovered: 1930-11-24  Algiers  L. Boyer
Family/Group: MB-Outer
Taxonomic Class: XFU
Published: MPB 38, 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)

MPB 30, 33-35: P = 6.81, A = 0.11, U = 2

Behrned reports P > 10 h (U = 1).
Remeasured data set indicates a long period. If the assumption is that the full height of the curve has been captured, then the period is on the order of 300 h (bimodal solution). If, as is often the case for very slow rotators, the amplitude is much more, the period is more on the order of 800-1000 h.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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