pdosmall.gif (6581 bytes)

The Minor Planet Observer
and
Palmer Divide Observatory

5905 Johnson (2008)

MPC Designation: 1989 CJ1
Lightcurves Period (h): 3.7827 0.0002
Amplitude (mag): 0.10 0.01
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.35m f/9.1 SCT
Camera: SBIG STL-1001E
Exposure: 240

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2008-05-29 07:00  15.97   24.8  267.8   35.2
2008-05-30 06:00  15.95   24.7  267.9   35.1
2008-06-03 06:00  15.89   24.1  268.3   35.0
2008-06-04 06:00  15.88   23.9  268.4   34.9
2008-06-06 06:00  15.85   23.6  268.6   34.8
2008-06-07 06:00  15.83   23.5  268.7   34.7
2008-06-08 06:00  15.82   23.4  268.8   34.6
2008-06-09 06:00  15.81   23.3  268.9   34.6
2008-06-10 06:00  15.79   23.1  268.9   34.5
2008-06-11 06:00  15.78   23.0  269.0   34.4
2008-06-12 06:00  15.77   22.9  269.1   34.3
2008-06-13 06:00  15.76   22.8  269.1   34.2
2008-06-27 06:00  15.65   22.0  270.0   32.3
2008-06-28 06:00  15.65   22.0  270.0   32.1
2008-06-30 08:00  15.64   22.0  270.1   31.8

Data Points: 594
Discovered: 1989-02-11  Palomar  E. F. Helin
Family/Group: Hungaria
Taxonomic Class: ES (Assumed)
Published: MPB 36, 89-90
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 on 2005 PDO binary discovery. Collaboration with Petr Pravec's Binary Asteroid Survey program. The plots use only PDO data. The periods in plots are based on using on the PDO data.

Estimated size ratio (satellite/primary): Ds/Dp = 0.38 0.02.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

This site is best viewed at 1024x768 and higher

This page was last updated on 16:22:52 2011-12-06 (Mountain Time)
All contents copyright (c) 2001-2011, Brian D. Warner and Bdw Publishing
Trademarks are the property of their repsective owners

Contact webmaster