205 Martha

From Wikipedia, the free encyclopedia
Jump to: navigation, search
205 Martha
Discovered by Johann Palisa
Discovery date October 13, 1879
Named after
Main belt
Orbital characteristics
Epoch 30 January 2005 (JD 2453400.5)
Aphelion 2.878 AU
Perihelion 2.676 AU
2.777 AU
Eccentricity 0.036
1690.412 d
(4.63 yr)
17.87 km/s
Inclination 10.695°
Physical characteristics
Dimensions 81.0 km
9.637 h
Albedo 0.054
Spectral type

205 Martha is a large main belt asteroid. It is a dark, primitive carbonaceous C-type asteroid. This object was discovered by Johann Palisa on October 13, 1879 in Pola and was named after Martha, a woman in the New Testament.

Efforts to determine the rotation period for this asteroid have produced wildly different results, in large part because the actual period is close to half of an Earth day. A study performed during 2013 showed that the light curve changed significantly during the observation period, adding to the difficulty. This study gave a synodic rotation period of 14.905 ± 0.001 h.[1]


  1. ^ Hawkins, Scot; Ditteon, Richard (January 2014), "Asteroid Lightcurve Analysis at the Oakley Observatory - May 2007", Minor Planet Bulletin 41 (1): 47–49, Bibcode:2014MPBu...41...47P. 

External links[edit]