8900 AAVSO

8900 AAVSO
Discovery [1]
Discovered by D. di Cicco
Discovery site Sudbury Obs. (817)
Discovery date 24 October 1995
Designations
MPC designation 8900 AAVSO
Named after
 AAVSO
(American Association of Variable Star Observers)[2]
1995 UD2 · 1979 UV
1987 SX16 · 1989 EU2
main-belt · (middle)
Orbital characteristics [1]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 0
Observation arc 37.06 yr (13,537 days)
Aphelion 2.9071 AU
Perihelion 2.1654 AU
2.5362 AU
Eccentricity 0.1462
4.04 yr (1,475 days)
135.20°
0° 14m 38.4s / day
Inclination 8.7318°
232.25°
99.742°
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]

    8900 AAVSO, provisional designation 1995 UD2, is a stony asteroid from the middle 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 stony S-type asteroid orbits the Sun 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]

    In May 2010, a photometric light-curve analysis at the U.S. Palomar Transient Factory, California, gave it a rotation period of 3.8368±0.0005 hours with a brightness amplitude of 0.43 in magnitude (U=2).[6] According to the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid 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]

    The 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. It 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] Naming citation was published on 1 May 2003 (M.P.C. 48388).[9]

    References

    1. 1 2 3 4 "JPL Small-Body Database Browser: 8900 AAVSO (1995 UD2)" (2016-11-10 last obs.). Jet Propulsion Laboratory. Retrieved 4 December 2016.
    2. 1 2 Schmadel, Lutz D. (2006). Dictionary of Minor Planet Names – (8900) AAVSO, Addendum to Fifth Edition: 2003–2005. Springer Berlin Heidelberg. p. 40. ISBN 978-3-540-34360-8. Retrieved 26 April 2016.
    3. 1 2 3 4 5 "LCDB Data for (8900) AAVSO". Asteroid Lightcurve Database (LCDB). Retrieved 26 April 2016.
    4. 1 2 3 4 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:1109.6407Freely accessible. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 26 April 2016.
    5. 1 2 3 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:1109.4096Freely accessible. Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. Retrieved 4 December 2016.
    6. 1 2 3 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:1504.04041Freely accessible. Bibcode:2015AJ....150...75W. doi:10.1088/0004-6256/150/3/75. Retrieved 26 April 2016.
    7. ↑ 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:1506.00762Freely accessible. Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. Retrieved 26 April 2016.
    8. 1 2 "8900 AAVSO (1995 UD2)". Minor Planet Center. Retrieved 26 April 2016.
    9. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 26 April 2016.

    External links

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