2228 Soyuz-Apollo
| Discovery [1] | |
|---|---|
| Discovered by | N. Chernykh |
| Discovery site | CrAO (Nauchnyj) |
| Discovery date | 19 July 1977 |
| Designations | |
| MPC designation | 2228 Soyuz-Apollo |
Named after | Apollo-Soyuz Test Project[2] |
|
1977 OH · 1933 SK1 1952 DT1 · 1963 DD 1973 YN3 | |
| main-belt · Themis [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 52.32 yr (19,111 days) |
| Aphelion | 3.7130 AU |
| Perihelion | 2.5580 AU |
| 3.1355 AU | |
| Eccentricity | 0.1841 |
| 5.55 yr (2,028 days) | |
| 199.63° | |
| Inclination | 1.9887° |
| 140.40° | |
| 285.84° | |
| Physical characteristics | |
| Dimensions |
28.26±0.49 km[4] 26.080±0.295 km[5] 24.66 km (caculated)[3] |
|
5.3846 h[6] 6.12 h[7] 5.4±0.05 h[6] 5.3868±0.0013 h[8] | |
|
0.101±0.004[4] 0.1134±0.0198[5] 0.08 (assumed)[3] | |
| C [3] | |
| 11.4[1] | |
|
| |
2228 Soyuz-Apollo, provisional designation 1977 OH, is a carbonaceous asteroid from the outer region of the asteroid belt, about 26 kilometers in diameter. It was discovered on 19 July 1977, by Soviet–Russian astronomer Nikolai Chernykh at the Crimean Astrophysical Observatory in Nauchnyj on the Crimean peninsula.[9]
The dark C-type asteroid is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. It orbits the Sun at a distance of 2.6–3.7 AU once every 5 years and 7 months (2,028 days). Its orbit shows an eccentricity of 0.18 and is tilted by 2 degrees to the plane of the ecliptic. It has a rotation period of 5.4 hours and an albedo of 0.10 and 0.11, as determined by the space-based Akari and WISE missions, respectively,[4][5] while the Collaborative Asteroid Lightcurve Link (CALL) assumes a somewhat lower albedo of 0.08.[3]
The minor planet was named after the joint Soviet-American space flight, the Apollo–Soyuz space program, carried on in 1975. The reversal of the names, "Soyuz–Apollo" rather than "Apollo–Soyuz", was not political, but to prevent confusion with the asteroid 1862 Apollo.[2]
References
- 1 2 3 "JPL Small-Body Database Browser: 2228 Soyuz-Apollo (1977 OH)" (2015-06-21 last obs.). Jet Propulsion Laboratory. Retrieved December 2015.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (2228) Soyuz-Apollo. Springer Berlin Heidelberg. p. 181. ISBN 978-3-540-29925-7. Retrieved December 2015.
- 1 2 3 4 5 "LCDB Data for (2228) Soyuz-Apollo". Asteroid Lightcurve Database (LCDB). Retrieved December 2015.
- 1 2 3 Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. Retrieved December 2015.
- 1 2 3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D.; et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved December 2015.
- 1 2 Behrend, Raoul. "Asteroids and comets rotation curves – (2228) Soyuz-Apollo". Geneva Observatory. Retrieved December 2015.
- ↑ Almeida, R.; Angeli, C. A.; Duffard, R.; Lazzaro, D. (February 2004). "Rotation periods for small main-belt asteroids". Astronomy and Astrophysics: 403–406. Bibcode:2004A&A...415..403A. doi:10.1051/0004-6361:20034585. Retrieved December 2015.
- ↑ Waszczak, Adam; Chang, Chan-Kao; Ofek, Eran O.; Laher, Russ; Masci, Frank; Levitan, David; et al. (September 2015). "Asteroid Light Curves from the Palomar Transient Factory Survey: Rotation Periods and Phase Functions from Sparse Photometry". The Astronomical Journal 150 (3): 35. arXiv:1504.04041. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved December 2015.
- ↑ "2228 Soyuz-Apollo (1977 OH)". Minor Planet Center. Retrieved December 2015.
External links
- Asteroid Lightcurve Database (LCDB), query form (info)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- 2228 Soyuz-Apollo at the JPL Small-Body Database
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