9084 Achristou
| Discovery [1] | |
|---|---|
| Discovered by | D. J. Asher |
| Discovery site | Siding Spring Obs. |
| Discovery date | 3 February 1995 |
| Designations | |
| MPC designation | 9084 Achristou |
Named after |
Apostolos Christou (astronomer)[2] |
| 1995 CS1 · 1980 GV1 | |
| main-belt (inner) · Hungaria [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 34.80 yr (12,711 days) |
| Aphelion | 2.0048 AU |
| Perihelion | 1.7151 AU |
| 1.8599 AU | |
| Eccentricity | 0.0778 |
| 2.54 yr (927 days) | |
| 255.37° | |
| Inclination | 23.095° |
| 197.54° | |
| 71.970° | |
| Earth MOID | 0.7785 AU |
| Physical characteristics | |
| Dimensions |
1.916±0.367 km[4] 1.76 km (calculated)[3] |
| 8.84±0.02 h[5] | |
|
0.3329±0.0782[4] 0.30 (assumed)[3] | |
| E [3] | |
| 15.7[1] | |
|
| |
9084 Achristou, provisional designation 1995 CS1, is a bright, stony asteroid from the inner regions of the asteroid belt, about 1.9 kilometers in diameter. It was discovered by British astronomer David J. Asher at Siding Spring Observatory in New South Wales, Australia, on 3 February 1995.[6]
The bright E-type asteroid is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.7–2.0 AU once every 2 years and 6 months (927 days). Its orbit shows an eccentricity of 0.08 and is tilted by 23 degrees to the plane of the ecliptic.[1][3] In 2013, a photometric light-curve analysis at the U.S. Center for Solar System Studies in California has given a rotation period of 8.84±0.02 hours with a brightness amplitude of 0.09 in magnitude.[5]
Based on the surveys carried out by the NEOWISE mission of the U.S. Wide-field Infrared Survey Explorer, the asteroid's surface has an albedo of 0.33, while the Collaborative Asteroid Lightcurve Link assumes a value of 0.30.[3][4]
The minor planet was named after Apostolos Christou (b. 1968), planetary astronomer at the Armagh Observatory, founded in North Ireland in 1790, and after which the minor planet 10502 Armaghobs was named. Christou is a dynamicist, programmer and observer. His interests include minor planets co-orbital with Venus, 1 Ceres, NEA mission design, meteors on Venus, as well as the irregular satellite families of the outer planets.[2]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 9084 Achristou (1995 CS1)" (2015-01-26 last obs.). Jet Propulsion Laboratory. Retrieved January 2016.
- 1 2 Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (9084) Achristou. Springer Berlin Heidelberg. p. 42. ISBN 978-3-540-34360-8. Retrieved January 2016.
- 1 2 3 4 5 6 "LCDB Data for (9084) Achristou". Asteroid Lightcurve Database (LCDB). Retrieved January 2016.
- 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. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved January 2016.
- 1 2 Stephens, Robert D.; Coley, Daniel; Warner, Brian D. (January 2014). "Collaborative Asteroid Lightcurve Analysis at the Center for Solar System Studies: 2013 April-June". Bulletin of the Minor Planets (Section of the Association of Lunar and Planetary Observers) 41 (1): 8–13. Bibcode:2014MPBu...41....8S. ISSN 1052-8091. Retrieved January 2016.
- ↑ "9084 Achristou (1995 CS1)". Minor Planet Center. Retrieved January 2016.
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 (5001)-(10000) – Minor Planet Center
- 9084 Achristou at the JPL Small-Body Database
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