4197 Morpheus
Near-Earth asteroid / From Wikipedia, the free encyclopedia
4197 Morpheus, provisional designation 1982 TA, is a highly eccentric asteroid and near-Earth object of the Apollo group, approximately 3 kilometers in diameter. It was discovered on 11 October 1982, by American astronomers Eleanor Helin and Eugene Shoemaker at Palomar Observatory in California, United States. The asteroid was later named for Morpheus from Greek mythology.[3]
Quick Facts Discovery, Discovered by ...
Discovery [1] | |
---|---|
Discovered by | E. F. Helin E. Shoemaker |
Discovery site | Palomar Obs. |
Discovery date | 11 October 1982 |
Designations | |
(4197) Morpheus | |
Pronunciation | /ˈmɔːrfiːəs/[2] |
Named after | Morpheus (mythology and movie)[3] |
1982 TA | |
Apollo · NEO Mars-crosser Venus-crosser | |
Orbital characteristics [1] | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 0 | |
Observation arc | 61.98 yr (22,639 days) |
Earliest precovery date | 3 September 1954 |
Aphelion | 4.0690 AU |
Perihelion | 0.5246 AU |
2.2968 AU | |
Eccentricity | 0.7716 |
3.48 yr (1,271 days) | |
339.88° | |
0° 16m 59.16s / day | |
Inclination | 12.577° |
7.1844° | |
122.40° | |
Earth MOID | 0.0987 AU · 38.5 LD |
Physical characteristics | |
1.8 km (dated)[1] 2.20 km (dated)[4] 2.98 km (taken)[5] 2.981 km[6] 3.043±0.156 km[7] | |
3.5372 h[8] 3.5380 h[9] 3.5387 h[10] 3.540±0.001 h[11] 3.560 h[12] | |
0.2389[5][6] 0.276±0.077[7] 0.44[4] | |
SMASS = Sq [1] · S [5] | |
14.6[1][7] · 14.8[4][5][6][11] · 14.88[9] | |
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