29 Amphitrite facts for kids
| Discovery | |
|---|---|
| Discovered by | A. Marth |
| Discovery date | March 1, 1854 |
| Designations | |
| A899 NG | |
| Main belt | |
| Orbital characteristics | |
| Epoch June 14, 2006 (JD 2453900.5) | |
| Aphelion | 409.809 Gm (2.739 AU) |
| Perihelion | 354.398 Gm (2.369 AU) |
| 382.103 Gm (2.554 AU) | |
| Eccentricity | 0.073 |
| 1491.013 d (4.08 a) | |
|
Average orbital speed
|
18.61 km/s |
| 229.662° | |
| Inclination | 6.096° |
| 356.501° | |
| 63.433° | |
| Physical characteristics | |
| Dimensions | 212.2 km |
| Mass | 1.0×1019 kg |
|
Mean density
|
2.0 g/cm³ |
| 0.0593 m/s² | |
| 0.1122 km/s | |
| 0.2246 d (5.390 h) | |
| Albedo | 0.1793 (geometric) |
| Temperature | ~170 K |
|
Spectral type
|
S |
| 8.58 to 11.38 | |
| 5.85 | |
| 0.21" to 0.078" | |
29 Amphitrite is one of the biggest S-type asteroids, probably third in diameter after Eunomia and Juno, although Iris and Herculina are similar in size.
It is probably not a fully solid body, since its density is too low for a solid silicate object and much lower than Eunomia or Juno. Its orbit is less eccentric and inclined than those of its bigger cousins - being indeed the most circular of any asteroid found up to that point - and as a consequence it never becomes as bright as Iris or Hebe, especially as it is much farther from the Sun than those asteroids. It can reach magnitudes of around +8.6 at a favorable opposition, but more usually is around the binocular limit of +9.5.
Amphitrite was found by Albert Marth on March 1, 1854. It was the only asteroid he found. It is named after Amphitrite, a sea goddess in Greek mythology.
A moon is suspected based on the lightcurve data.
Images for kids
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Lightcurve-based 3D-model of Amphitrite
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See also
In Spanish: (29) Amphitrite para niños
