452 Hamiltonia

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452 Hamiltonia
Discovery
Discovered by James Edward Keeler
Discovery site Mount Hamilton
Discovery date 6 December 1899
Designations
MPC designation 452
Named after
Mount Hamilton
1899 FD
main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 116.35 yr (42497 d)
Aphelion 2.8911284 AU (432.50665 Gm)
Perihelion 2.8064929 AU (419.84536 Gm)
2.8488107 AU (426.17601 Gm)
Eccentricity 0.0148545
4.81 yr (1756.3 d)
9.4952678°
0° 12m 17.923s / day
Inclination 3.223518°
92.53125°
69.71870°
Earth MOID 1.81372 AU (271.329 Gm)
Jupiter MOID 2.07491 AU (310.402 Gm)
Jupiter Tisserand parameter 3.304
Physical characteristics
2.8813 h (0.12005 d)
11.9

452 Hamiltonia is an asteroid. It was discovered by James Edward Keeler on December 6, 1899, but was then lost until 1987. Its provisional name was 1899 FD. The asteroid is named for Mount Hamilton, the site of Lick Observatory where Keeler was working when he discovered the asteroid. It was the last asteroid discovery of the 19th century.

L. K. Kristensen at Aarhus University rediscovered 452 Hamiltonia along with 1537 Transylvania along with numerous other small objects in 1981.[2] These rediscoveries left only nine numbered minor planets unobserved since their discoveries: 330 Adalberta (which never existed in the first place), (473) Nolli, (719) Albert, (724) Hapag, (843) Nicolaia, (878) Mildred, (1009) Sirene, (1026) Ingrid, and (1179) Mally.[2] However, by the mid-1980s the only remaining lost asteroids of this group were (719) Albert (rediscovered in 2000), (724) Hapag (rediscovered in 1988), and (878) Mildred (rediscovered in 1991).[3]

References[edit]

  1. ^ "452 Hamiltonia (1899 FD)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 6 May 2016. 
  2. ^ a b (1537) Transylvania and (452) Hamiltonia Kristensen, L. K.; Gibson, J.; Shao, C.-Y.; Bowell, E.; Marsden, B. G. IAU Circ., 3595, 1 (1981). Edited by Marsden, B. G. [1]
  3. ^ Cowen, Ron (2000-05-20). "Astronomers Rediscover Long-Lost Asteroid". 157 (21). Science News. 

External links[edit]