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The Minor Planet Observer
and
Palmer Divide Observatory

5905 Johnson (2005)

MPC Designation: 1989 CJ1
Lightcurves Period (h): 3.7824 ± 0.0002
Amplitude (mag): 0.11 ± 0.01
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.5m f/8.1 R/C
Camera: FLI 1024 SITe
Exposure: 180

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2005-04-01 09:00  16.01   18.1  187.2   29.9
2005-04-02 09:00  16.02   18.2  187.2   30.0
2005-04-03 09:00  16.02   18.4  187.2   30.2
2005-04-04 09:00  16.03   18.6  187.2   30.3
2005-04-07 09:00  16.06   19.1  187.2   30.6
2005-04-09 09:00  16.09   19.5  187.3   30.8
2005-04-12 09:00  16.12   20.2  187.3   31.1
2005-04-13 09:00  16.14   20.4  187.4   31.2
2005-04-15 09:00  16.16   20.8  187.4   31.3

Data Points: 432
Discovered: 1989-02-11  Palomar  E. F. Helin
Family/Group: Hungaria
Taxonomic Class: ES (Assumed)
Published: IAUC 8511
NOTES: Unless otherwise stated, the "Reduced Magnitudes" in the plots are Cousins R, based on 2MASS to BVRI conversions (Warner, MPB 34, 113-119)

PDO binary discovery in collaboration with Petr Pravec's Binary Asteroid Survey Program. The plots show only PDO data. The period solution using only PDO data differs slightly from the final results using the larger set from the collaboration.

 

Contents © 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

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