2571 Geisei
| Discovery [1] | |
|---|---|
| Discovered by | T. Seki |
| Discovery site | Geisei Obs. |
| Discovery date | 23 October 1981 |
| Designations | |
| MPC designation | 2571 Geisei |
Named after |
Geisei (village, observatory)[2] |
|
1981 UC · 1931 TA4 1934 NV · 1944 OD 1961 XG · 1981 WR6 A911 UC | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 84.49 yr (30,859 days) |
| Aphelion | 2.6616 AU |
| Perihelion | 1.7968 AU |
| 2.2292 AU | |
| Eccentricity | 0.194 |
| 3.33 yr (1,216 days) | |
| 199.3887° | |
| 0° 17m 45.96s / day | |
| Inclination | 2.8715° |
| 66.9291° | |
| 284.5854° | |
| Earth MOID | 0.7929 AU |
| Jupiter MOID | 2.758 AU (412.6 Gm) |
| Jupiter Tisserand parameter | 3.617 |
| Physical characteristics | |
| Dimensions |
6.582±0.035 km[4] 7.14 km (calculated)[3] |
| 7.823±0.005 h[5] | |
|
0.2573±0.0688[4] 0.24 (assumed)[3] | |
| S [3] | |
|
13.0[1][4] 12.9[3] 13.32±0.26[6] | |
|
| |
2571 Geisei, provisional designation 1981 UC, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 7 kilometers in diameter. It was discovered by Japanese astronomer Tsutomu Seki at Geisei Observatory on 23 October 1981.[7]
The S-type asteroid is a member of the Flora family, one of the largest groups of stony asteroids in the main-belt. It orbits the Sun at a distance of 1.8–2.7 AU once every 3 years and 4 months (1,216 days). Its orbit has an eccentricity of 0.19 and an inclination of 3° with respect to the ecliptic.[1] The first used precovery was taken at Lowell Observatory in 1931, extending the asteroid's observation arc by 50 years prior to its discovery, while the first unused observation at Heidelberg Observatory dates back to 1911.[7]
A rotational light-curve for this asteroid was obtained from photometric observations made at the Australian Oakley Southern Sky Observatory (E09) in September 2014. The light-curve gave a rotation period of 7.823±0.005 hours with a brightness variation of 0.50 in magnitude (U=3-).[5]
According to the survey carried out by the NEOWISE mission of NASA's space-based Wide-field Infrared Survey Explorer, the asteroid measures 6.6 kilometers in diameter and its surface has an albedo of 0.257,[4] while the Collaborative Asteroid Lightcurve Link assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of this orbital family – and calculates a diameter of 7.1 kilometers, based on an absolute magnitude of 12.9.[3]
The minor planet is named after the small Japanese village of Geisei, where the discovering observatory is located. Geisei is situated near the city of Kōchi, after which Tsutomu Seki's first discovery, the asteroid 2396 Kochi, is named.[2] Naming citation was published on 6 June 1982 (M.P.C. 6956).[8]
References
- 1 2 3 4 "JPL Small-Body Database Browser: 2571 Geisei (1981 UC)" (2016-04-07 last obs.). Jet Propulsion Laboratory. Retrieved 17 May 2016.
- 1 2 Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2571) Geisei. Springer Berlin Heidelberg. p. 210. ISBN 978-3-540-00238-3. Retrieved 17 May 2016.
- 1 2 3 4 5 6 "LCDB Data for (2571) Geisei". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
- 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:1109.6407
. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved 17 May 2016. - 1 2 Bohn, Lucas; Hibbler, Brianna; Stein, Gregory; Ditteon, Richard (April 2015). "Asteroid Lightcurve Analysis at the Oakley Southern Sky Observatory: 2014 September". The Minor Planet Bulletin. 42 (2): 89–90. Bibcode:2015MPBu...42...89B. ISSN 1052-8091. Retrieved 17 May 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. Retrieved 17 May 2016.
- 1 2 "2571 Geisei (1981 UC)". Minor Planet Center. Retrieved 17 May 2016.
- ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 17 May 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 (1)-(5000) – Minor Planet Center
- 2571 Geisei at the JPL Small-Body Database
