74 Galatea
For the moon of Neptune, see Galatea (moon).
| Discovery | |
|---|---|
| Discovered by | Ernst Wilhelm Tempel |
| Discovery date | August 29, 1862 |
| Designations | |
| Main belt | |
| Orbital characteristics[1] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 515.376 Gm (3.445 AU) |
| Perihelion | 315.937 Gm (2.112 AU) |
| 415.657 Gm (2.778 AU) | |
| Eccentricity | 0.240 |
| 1691.658 d (4.63 a) | |
Average orbital speed | 17.61 km/s |
| 36.838° | |
| Inclination | 4.075° |
| 197.313° | |
| 174.519° | |
| Physical characteristics | |
| Dimensions | 120.67 ± 7.15 km[2] |
| Mass | (6.13 ± 5.36) × 1018 kg[2] |
Mean density | 6.66 ± 5.94[2] g/cm3 |
| 0.0332 m/s² | |
| 0.0628 km/s | |
| 17.270[3] h | |
| Albedo | 0.043 [4] |
| Temperature | ~167 K |
Spectral type | C[5] |
| 8.66 | |
|
| |
74 Galatea (/ˈɡæləˈtiːə/ GAL-ə-TEE-ə) is a large main-belt asteroid. Its surface is very dark in color. Galatea was found by the prolific comet discoverer Ernst Tempel on August 29, 1862, in Marseilles, France. It was his third asteroid discovery. It is named after one of the two Galateas in Greek mythology. A stellar occultation by Galatea was observed on September 8, 1987. The name Galatea has also been given to one of Neptune's satellites.
Photometric observations of this asteroid made during 2008 at the Organ Mesa Observatory in Las Cruces, New Mexico gave a light curve with a period of 17.270 ± 0.002 hours and a brightness variation of 0.08 ± 0.01 in magnitude. The curve displays four minima and four maxima.[3]
References
- ↑ Yeomans, Donald K., "74 Galatea", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 2013-03-30.
- 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336
, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1. - 1 2 Pilcher, Frederick (September 2008), "Period Determinations for 26 Proserpina, 34 Circe 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta", The Minor Planet Bulletin, 35 (3), pp. 135–138, Bibcode:2008MPBu...35..135P.
- ↑ Asteroid Data Sets
- ↑
External links
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