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660 Crescentia

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660 Crescentia
Discovery
Discovered byJoel Hastings Metcalf
Discovery siteTaunton, Massachusetts
Discovery date8 January 1908
Designations
MPC designation(660) Crescentia
Pronunciation/krəˈsɛnʃə/
Alternative designations1908 CC
Orbital characteristics
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc106.74 yr (38987 d)
Aphelion2.8075 AU (420.00 Gm)
Perihelion2.2581 AU (337.81 Gm)
Semi-major axis2.5328 AU (378.90 Gm)
Eccentricity0.10846
Orbital period (sidereal)4.03 yr (1472.3 d)
Mean anomaly185.507°
Mean motion0° 14 40.272 / day
Inclination15.205°
Longitude of ascending node156.981°
Argument of perihelion106.012°
Physical characteristics
Mean radius21.12±0.5 km
Synodic rotation period7.9116 h (0.32965 d)
Geometric albedo0.2186±0.011
Absolute magnitude (H)9.14

660 Crescentia is a minor planet orbiting the Sun that was discovered by American astronomer Joel Hastings Metcalf on January 8, 1908. The name may have been inspired by the asteroid's provisional designation 1908 CC. Peter Ting points out that the Rev. Joel Metcalf of Taunton (Massachusetts) discovered six asteroids with unexplained names, though listed in Lutz Schmadel's book. Ting used an on-line planetarium website to help with the location of some of the planets, playing back to the night of discovery. He noticed that there was a crescent moon (33%) low in the western sky and wonders if the Rev. Metcalf could have named the asteroid for the Moon. Crescentia would be a very unusual name for a person but not for a phase of the Moon.

Crescentia is a member of the dynamic Maria family of asteroids that most likely formed as the result of a collisional breakup of a parent body.

References

  1. Yeomans, Donald K., "660 Crescentia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
  2. Veeder, G. J.; et al. (March 1995), "Eos, Koronis, and Maria family asteroids: Infrared (JHK) photometry" (PDF), Icarus, vol. 114, pp. 186–196, Bibcode:1995Icar..114..186V, CiteSeerX 10.1.1.31.2739, doi:10.1006/icar.1995.1053.

External links

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