29 Amphitrite

From Simple English Wikipedia, the free encyclopedia
Jump to navigation Jump to search
29 Amphitrite
Discovered byA. Marth
Discovery dateMarch 1, 1854
A899 NG
Main belt
Orbital characteristics
Epoch June 14, 2006 (JD 2453900.5)
Aphelion409.809 Gm (2.739 AU)
Perihelion354.398 Gm (2.369 AU)
382.103 Gm (2.554 AU)
1491.013 d (4.08 a)
18.61 km/s
Physical characteristics
Dimensions212.2 km
Mass1.0×1019 kg
Mean density
2.0 g/cm³
0.0593 m/s²
0.1122 km/s
0.2246 d (5.390 h) [1]
Albedo0.1793 (geometric[2]
Temperature~170 K
Spectral type
8.58 to 11.38
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.[3] [4]

References[change | change source]

  1. PSI.edu
  2. "PSI.edu - Albedos". Archived from the original on 2012-06-27. Retrieved 2007-12-19.
  3. Tedesco, E. F. (March 1979). "Binary Asteroids: Evidence for Their Existence from Lightcurves". Science, New Series. 203 (4383): 905–907. Bibcode:1979Sci...203..905T. doi:10.1126/science.203.4383.905. PMID 17771729. S2CID 19431574.
  4. van Flandern, T. C.; Tedesco, Edward F.; Binzel, Richard P. (1979). "Satellites of asteroids". Asteroids. Tucson, AZ: University of Arizona Press. pp. 443–465. Bibcode:1979aste.book..443V.

Other websites[change | change source]