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The Minor Planet Observer
and
Palmer Divide Observatory

2007 Shoemaker Grant Recipient

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224 Oceana

MPO Home Period (h): 9.385 ± 0.003
Lightcurves Amplitude (mag): 0.10 ± 0.02
Date Range (mm/dd): 2006   01/19 - 01/25
Data Points: 1064
Equipment: 0.5m R-C, FLI-1001E
Discovered: Mar 30, 1882   J. Palisa at Vienna
Previous Designations: 1933 HO, A899 EA
Family/Group: Kozai: 30
Taxonomic Class: M  (Tholen)
H (absolute mag): 8.59
Diameter (km) / albedo: 61.82 ± 2.1 / 0.1694 ± 0.012
SM Axis (AU): 2.6446
Inclination (deg): 5.8382
Eccentricity: 0.0459
Published: Minor Planet Bul. 33-3, 58-62.
NOTES: Observations in support of radar work by Michael Shepard, Bloomsburg University, Bloomsburg, PA.

Period previously reported by Harris (Harris, A.W., Young, J.W.: 1980, Icarus 43, 20-32) as 18.933h. The shorter period reported above is more likely but still ambiguous.

The plot shows absolute magnitudes using Clear to V reduction methods in MPO Canopus/PhotoRed. The zero point for the second and subsequent sessions was adjusted to allow for the asteroid's dimming due to phase angle and distance changes. Without the conversion to standard magnitudes and an adjustment for a steeper than usual value for G (usually assumed to be +0.15), the period solution was not as certain.

Thanks to Alan Harris and Petr Pravec for their help in the analysis.

 

Contents © 2006 Brian D. Warner / Palmer Divide Observatory

 

 

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