29 Amphitrite
Main-belt asteroid
- 1 min read
- 3 chapters
Related on Lably
Through Unicode, Binoculars and Natural satellite
Discovery
Amphitrite was discovered by Albert Marth on 1 March 1854, at the private South Villa Observatory, in Regent's Park, London. It was Marth's only asteroid discovery. Its name was chosen by George Bishop, the owner of the observatory, who named it after Amphitrite, a sea goddess in Greek mythology. Its historical symbol was a shell and star; it was encoded in Unicode 17.0 as U+1CECF ().
Sign in to keep reading
2 more chapters are free with a Lably account.
Characteristics
Amphitrite's orbit is less eccentric and inclined than those of its larger cousins; indeed, it is the most circular of any asteroid discovered up to that point. As a consequence, it never becomes as bright as Iris or Hebe, especially as it is much further from the Sun than those asteroids. It can reach magnitudes of around +8.6 at a favorable opposition, but usually is around the binocular limit of +9.5.
In 2007, James Baer and Steven R. Chesley estimated Amphitrite to have a mass of 1.9×1019 kg. A 2008 estimate by Baer suggests it has a mass of 1.18×1019 kg.
A satellite of the asteroid is suspected to exist, based on lightcurve data collected by Edward F. Tedesco. In 1988 a search for satellites or dust orbiting this asteroid was performed using the UH88 telescope at the Mauna Kea Observatories, but neither were found.
Proposed exploration
In 1984, while determining the Galileo mission's prelaunch trajectory to Jupiter, JPL engineers found out that if the spacecraft was launched in May 1986, it could perform a flyby of 29 Amphitrite at a distance of 6,200 mi (10,000 km) on 6 December 1986. However, with the Challenger disaster delaying the launch to October 1989, the flyby was ultimately cancelled.