pdosmall.gif (6581 bytes)

The Minor Planet Observer
and
Palmer Divide Observatory

630 Euphemia (2005)

MPC Designation: 1907 XW
Lightcurves Period (h): 350. 50.
Amplitude (mag): 0.45 0.05
Equipment:

 

Filter: C
MagBand: R
Telescope: 0.35m f/9.1 SCT
Camera: FLI 1001E
Exposure: 150

 

Obs. Details

Date              E Mag   Phase  PABL   PABB
2005-04-01 08:00  14.32    9.9  185.7   18.4
2005-04-02 09:00  14.34   10.1  185.7   18.4
2005-04-03 09:00  14.35   10.2  185.8   18.4
2005-04-04 09:00  14.36   10.4  185.8   18.4
2005-04-07 09:00  14.40   11.0  185.9   18.4
2005-04-09 09:00  14.43   11.5  186.0   18.4
2005-04-12 09:00  14.48   12.3  186.1   18.3

Data Points: 624
Discovered: 1907-03-07  Heidelberg  A. Kopff
Family/Group: Eunomia
Taxonomic Class: S (Assumed)
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)

Period in MPB 32, 90-92, was 79.18. Measured images using Comp Star Selector in MPO Canopus and found the new, much longer solution.

The tumbling damping time for this period is > 4.5 Gyr (see Pravec et al., 2005). No obvious signs of tumbling were found but since the data set did not fully cover the curve at least once and start into a second cycle, the lack of evidence is not proof one way or the other. This is rated PAR = 0.

 

Contents 2011 Brian D. Warner / Palmer Divide Observatory

 

 

 

This site is best viewed at 1024x768 and higher

This page was last updated on 16:22:51 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