8900 AAVSO, provisional designation 1995 UD2, is a stony background asteroid from the central region of the asteroid belt, approximately 5.5 kilometers in diameter. It was discovered by American amateur astronomer Dennis di Cicco at the U.S Sudbury Observatory (817), Massachusetts, on 24 October 1995.[8] The asteroid was named after the American Association of Variable Star Observers (AAVSO).[2]
| Discovery [1] | |
|---|---|
| Discovered by | D. di Cicco |
| Discovery site | Sudbury Obs. (817) |
| Discovery date | 24 October 1995 |
| Designations | |
| (8900) AAVSO | |
Named after | AAVSO (American Association of Variable Star Observers)[2] |
| 1995 UD2 · 1979 UV 1987 SX16 · 1989 EU2 | |
| main-belt · (middle) background | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 37.37 yr (13,651 days) |
| Aphelion | 2.9070 AU |
| Perihelion | 2.1657 AU |
| 2.5364 AU | |
| Eccentricity | 0.1461 |
| 4.04 yr (1,475 days) | |
| 184.05° | |
| 0° 14m 38.4s / day | |
| Inclination | 8.7319° |
| 232.25° | |
| 99.711° | |
| Physical characteristics | |
| Dimensions | 5.28 km (calculated)[3] 5.792±0.320 km[4][5] |
| 3.8368±0.0005 h[6] | |
| 0.20 (assumed)[3] 0.276±0.038[4][5] | |
| S [3] | |
| 13.4[1] · 13.75[3] · 13.2[4] · 13.303±0.004 (R)[6] · 13.84±0.28[7] | |
Orbit and classification edit
AAVSO is a non-family asteroid from the main belt's background population. It orbits the Sun in the central main-belt at a distance of 2.2–2.9 AU once every 4.04 years (1,475 days). Its orbit has an eccentricity of 0.15 and an inclination of 9° with respect to the ecliptic.[1] The first precovery was obtained at Kleť Observatory in 1979, extending the asteroid's observation arc by 16 years prior to its discovery.[8]
Naming edit
This minor planet was named after the American Association of Variable Star Observers (AAVSO), an astronomical pro-am organization that promotes the study of variable stars to both amateur and professional astronomers, maintaining the largest database of variable star observations in the world.[2]
AAVSO was founded in 1911 by amateur astronomer William Tyler Olcott (1873–1936), based on a suggestion by Edward Charles Pickering's (1846–1919), after whom the minor planet 784 Pickeringia is named.[2] The official naming citation was published by the Minor Planet Center on 1 May 2003 (M.P.C. 48388).[9]
Physical characteristics edit
Lightcurve edit
In May 2010, a rotational lightcurve of AAVSO was obtained at the Palomar Transient Factory in California. Lightcurve analysis gave a rotation period of 3.8368 hours with a brightness variation of 0.43 in magnitude (U=2).[6]
Diameter and albedo edit
According to the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, AAVSO measures 5.8 kilometers in diameter and its surface has an albedo of 0.28,[4][5] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 5.3 kilometers.[3]
References edit
- ^ a b c d "JPL Small-Body Database Browser: 8900 AAVSO (1995 UD2)" (2017-03-04 last obs.). Jet Propulsion Laboratory. Retrieved 22 June 2017.
- ^ a b c d Schmadel, Lutz D. (2006). "(8900) Aavso [2.54, 0.14, 8.7]". Dictionary of Minor Planet Names – (8900) AAVSO, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 40. doi:10.1007/978-3-540-34361-5_277. ISBN 978-3-540-34360-8.
- ^ a b c d e "LCDB Data for (8900) AAVSO". Asteroid Lightcurve Database (LCDB). Retrieved 26 April 2016.
- ^ a b c d 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. S2CID 118700974. Retrieved 26 April 2016.
- ^ a b c 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. arXiv:1109.4096. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID 118745497. Retrieved 4 December 2016.
- ^ a b c 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. S2CID 8342929. Retrieved 26 April 2016.
- ^ 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. arXiv:1506.00762. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID 53493339. Retrieved 26 April 2016.
- ^ a b "8900 AAVSO (1995 UD2)". Minor Planet Center. Retrieved 26 April 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 26 April 2016.
External links edit
- M.P.C. 48317 Minor Planets Circular, 2003
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- 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
- 8900 AAVSO at AstDyS-2, Asteroids—Dynamic Site
- 8900 AAVSO at the JPL Small-Body Database
