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The Minor Planet Observer
and
Palmer Divide Observatory

862 Franzia (2004)

MPC Designation: 1917 BF
Lightcurves Period (h): 7.65 0.01
Amplitude (mag): 0.10 0.01
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.25m f/10.1 SC
Camera: SBIG ST-9E
Exposure: 60

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2004-09-03 06:00  14.45    5.2  337.3   11.1
2004-09-06 06:00  14.48    5.8  337.3   11.3
2004-09-07 06:00  14.49    6.0  337.3   11.3
2004-09-08 06:00  14.50    6.3  337.3   11.3
2004-09-09 06:00  14.52    6.6  337.3   11.4

Data Points: 718
Discovered: 1917-01-28  Heidelberg  M.F. Wolf
Family/Group: MB-Outer
Taxonomic Class: S
Published: MPB 37, 127-130
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 32, 29-32: P = 15.05, A = 0.12, U = 2. The period was reported as ambiguous with P = 7.6 being possible (bimodal or monomodal curve). Remeasurment of the images found P = 7.52 h as the more likely period (also MPB 37, 127-130). The follow-up in 2004 found P = 7.65 h with P = 15.27 also being possible.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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