205 Martha

205 Martha
Discovery
Discovered by Johann Palisa
Discovery date 13 October 1879
Designations
MPC designation (205) Martha
Named after
 Martha
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 136.51 yr (49860 d)
Aphelion 2.8758 AU (430.21 Gm)
Perihelion 2.6783 AU (400.67 Gm)
2.7771 AU (415.45 Gm)
Eccentricity 0.035571
4.63 yr (1690.3 d)
17.87 km/s
198.37°
0° 12m 46.692s / day
Inclination 10.696°
211.792°
177.281°
Physical characteristics
Dimensions 80.58±1.4 km
14.911 h (0.6213 d)
0.0553±0.002
C
9.23

    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 13 October 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.[2]

    References

    1. ↑ "205 Martha". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
    2. ↑ Hawkins, Scot; Ditteon, Richard (January 2014), "Asteroid Lightcurve Analysis at the Oakley Observatory - May 2007", Minor Planet Bulletin, 41 (1): 47&ndash, 49, Bibcode:2014MPBu...41...47P.


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