29 Amphitrite
Main-belt asteroid / From Wikipedia, the free encyclopedia
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29 Amphitrite is one of the largest S-type asteroids, approximately 200 kilometers (120 miles) in diameter, and probably fifth largest after Eunomia, Juno, Iris and Herculina.
Quick Facts Discovery, Discovered by ...
Discovery [1] | |
---|---|
Discovered by | A. Marth |
Discovery site | London |
Discovery date | 1 March 1854 |
Designations | |
(29) Amphitrite | |
Pronunciation | /æmfɪˈtraɪtiː/[2] |
Named after | Amphitrite [3] (Greek mythology) |
A899 NG | |
main-belt [1][4] · (middle) background [5][6] | |
Adjectives | Amphitritean /ˌæmfɪtrɪˈtiːən/, /ˌæmfɪˈtraɪtiən/ |
Symbol | (historical) |
Orbital characteristics [4] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 162.83 yr (59,472 d) |
Aphelion | 2.7400 AU |
Perihelion | 2.3712 AU |
2.5556 AU | |
Eccentricity | 0.0722 |
4.09 yr (1,492 d) | |
187.97° | |
0° 14m 28.68s / day | |
Inclination | 6.0823° |
356.37° | |
63.036° | |
Physical characteristics | |
Dimensions | 233 km × 212 km × 193 km[7] |
204±2 km[8] 189.6±1.1 km[9] 196±22 km[10] 206.86 km[11] 212.22±6.8 km[12] 227.1±4.0 km[13] | |
Flattening | 0.18[lower-alpha 1] |
Mass | (12.7±2.0)×1018 kg[8] (11.8±?)×1018 kg[7] |
Mean density | 2.86±0.45 g/cm3[8] 2.36±0.26 g/cm3[7] |
5.3921 h[14][6] | |
0.194[8] 0.157±0.035[13] 0.1793±0.012[12] 0.195[11] 0.216±0.043[9] | |
S [6] | |
5.85[1] 5.99[4] 6.0[5] | |
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