200 Dynamene

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200 Dynamene
Discovery
Discovered by C. H. F. Peters, 1879
Designations
Minor planet category Main belt
Orbital characteristics[1]
Aphelion 3.102 AU
Perihelion 2.376 AU
Semi-major axis 2.739 AU
Eccentricity 0.133
Orbital period 4.53 years
Inclination 6.90°
Physical characteristics
Dimensions 130.71 ± 3.01[2] km
Mass (1.07 ± 0.16) × 1019[2] kg
Mean density 9.14 ± 1.51[2] g/cm3
Rotation period 37.394[3] h
Albedo 0.053
Spectral type C
Absolute magnitude (H) 8.26

200 Dynamene is a large dark main-belt asteroid that was discovered by German-American astronomer Christian Heinrich Friedrich Peters on July 27, 1879, in Clinton, New York. The name derives from Dynamene, one of the fifty Nereids in Greek mythology. Based upon its spectrum, 200 Dynamene is classified as a C-type asteroid, indicating that it probably has a primitive composition similar to the carbonaceous chondrite meteorites.

Photometric observations of this asteroid at the Organ Mesa Observatory in Las Cruces, New Mexico in 2011 gave a light curve with a period of 37.394 ± 0.002 hours and a brightness variation of 0.10 ± 0.01 in magnitude. The curve is asymmetrical with four uneven minima and maxima.[3]

References[edit]

  1. ^ Yeomans, Donald K., "200 Dynamene", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98-118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ a b Pilcher, Frederick (April 2012), "Rotation Period Determinations for 31 Euphrosyne, 65 Cybele, 154 Bertha 177 Irma, 200 Dynamene, 724 Hapag, 880 Herba, and 1470 Carla", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 39 (2): 57–60, Bibcode:2012MPBu...39...57P.