Engineering:2228 Soyuz-Apollo
| Discovery [1] | |
|---|---|
| Discovered by | N. Chernykh |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 19 July 1977 |
| Designations | |
| (2228) Soyuz-Apollo | |
| Named after | Apollo–Soyuz (Test Project) [2] |
| 1977 OH · 1933 SK1 1952 DT1 · 1963 DD 1973 YN3 | |
| Minor planet category | main-belt · Themis [3] |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 53.75 yr (19,632 days) |
| |{{{apsis}}}|helion}} | 3.7135 AU |
| |{{{apsis}}}|helion}} | 2.5605 AU |
| 3.1370 AU | |
| Eccentricity | 0.1838 |
| Orbital period | 5.56 yr (2,029 days) |
| Mean anomaly | 341.70° |
| Mean motion | 0° 10m 38.64s / day |
| Inclination | 1.9888° |
| Longitude of ascending node | 140.40° |
| 285.71° | |
| Physical characteristics | |
| Dimensions | 23.55 km (calculated)[3] 26.080±0.295 km[4][5] 28.26±0.49 km[6] |
| Rotation period | 5.3846±0.0007 h[7] 5.3868±0.0013 h[8] 5.4±0.05 h[7] 6.12 h[9] |
| Geometric albedo | 0.08 (assumed)[3] 0.101±0.004[6] 0.113±0.020[5] 0.1134±0.0198[4] |
| C [3] | |
| Absolute magnitude (H) | 10.9[4][6] · 11.21±0.42[10] · 11.5[1][3] · 11.848±0.002 (S)[8] |
2228 Soyuz-Apollo, provisional designation 1977 OH, is a carbonaceous Themistian asteroid from the outer region of the asteroid belt, approximately 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.[11] It was named after the Apollo–Soyuz Test Project.[2]
Orbit and classification
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 in the outer main-belt at a distance of 2.6–3.7 AU once every 5 years and 7 months (2,029 days). Its orbit has an eccentricity of 0.18 and an inclination of 2° with respect to the ecliptic.[1]
Physical characteristics
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,[6][4] while the Collaborative Asteroid Lightcurve Link (CALL) assumes a lower albedo of 0.08.[3]
Naming
This minor planet was named after the joint Soviet-American space flight, the Apollo–Soyuz Test Project, 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] The official naming citation was published by the Minor Planet Center on 1 March 1981 (M.P.C. 5850).[12]
References
- ↑ 1.0 1.1 1.2 1.3 "JPL Small-Body Database Browser: 2228 Soyuz-Apollo (1977 OH)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2002228.
- ↑ 2.0 2.1 2.2 Schmadel, Lutz D. (2007). "(2228) Soyuz-Apollo". Dictionary of Minor Planet Names – (2228) Soyuz-Apollo. Springer Berlin Heidelberg. p. 181. doi:10.1007/978-3-540-29925-7_2229. ISBN 978-3-540-00238-3.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (2228) Soyuz-Apollo". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=2228%7CSoyuz-Apollo.
- ↑ 4.0 4.1 4.2 4.3 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. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M.
- ↑ 5.0 5.1 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2011ApJ...741...68M. Retrieved 7 December 2016.
- ↑ 6.0 6.1 6.2 6.3 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. doi:10.1093/pasj/63.5.1117. Bibcode: 2011PASJ...63.1117U. (online, AcuA catalog p. 153)
- ↑ 7.0 7.1 Behrend, Raoul. "Asteroids and comets rotation curves – (2228) Soyuz-Apollo". Geneva Observatory. http://obswww.unige.ch/~behrend/page4cou.html#002228.
- ↑ 8.0 8.1 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. doi:10.1088/0004-6256/150/3/75. Bibcode: 2015AJ....150...75W. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015AJ....150...75W. Retrieved 7 December 2016.
- ↑ Almeida, R.; Angeli, C. A.; Duffard, R.; Lazzaro, D. (February 2004). "Rotation periods for small main-belt asteroids". Astronomy and Astrophysics 415: 403–406. doi:10.1051/0004-6361:20034585. Bibcode: 2004A&A...415..403A.
- ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2015Icar..261...34V. Retrieved 7 December 2016.
- ↑ "2228 Soyuz-Apollo (1977 OH)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=2228.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html.
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 AstDyS-2, Asteroids—Dynamic Site
- 2228 Soyuz-Apollo at the JPL Small-Body Database
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