1991 Darwin
| Discovery [1] | |
|---|---|
| Discovered by | C. U. Cesco, A. R. Klemola |
| Discovery site |
El Leoncito (Yale–Columbia Southern Station) Félix Aguilar Obs. |
| Discovery date | 6 May 1967 |
| Designations | |
| MPC designation | 1991 Darwin |
Named after |
Charles Darwin George Darwin[2] |
|
1967 JL · 1954 UG 1971 SU2 | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 27 June 2015 (JD 2457200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 61.08 yr (22,310 days) |
| Aphelion | 2.7164 AU |
| Perihelion | 1.7803 AU |
| 2.2484 AU | |
| Eccentricity | 0.2081 |
| 3.37 yr (1,231 days) | |
| 44.596° | |
| Inclination | 5.9196° |
| 328.47° | |
| 345.59° | |
| Physical characteristics | |
| Dimensions |
4.989±0.371 km[4] 5.024 km[5] 5.02 km (taken)[3] |
| 4.7 h[6] | |
|
0.2577±0.0777[4] 0.2541[5] | |
| S [3] | |
| 13.4[1] | |
|
| |
1991 Darwin, provisional designation 1967 JL, is a stony asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered on 6 May 1967, by Argentine astronomers Carlos Cesco and Arnold Klemola at the El Leoncito, Yale–Columbia Southern Station, Félix Aguilar Observatory in Argentina.[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 (1,231 days). Its orbit is tilted by 6 degrees to the plane of the ecliptic and shows an eccentricity of 0.21. It has a rotation period of 4.7 hours[6] and an albedo of about 0.25, according to observations made by the Wide-field Infrared Survey Explorer.[4][5]
The asteroid is named in memory of famous English naturalist Charles Darwin (1809–1882), first to established the theory of biological evolution. While on research in Argentina, he crossed the Andes relatively near to the Leoncito Astronomical Complex where the minor planet has been discovered. The asteroid also honors George Darwin (1845–1912), his second son who was a noted astronomer for his pioneering application of detailed dynamical analyses to problems of cosmogony and geology. The Darwins are also honored by the lunar and Martian craters Darwin.[2]
References
- 1 2 3 "JPL Small-Body Database Browser: 1991 Darwin (1967 JL)" (2015-11-19 last obs.). Jet Propulsion Laboratory. Retrieved December 2015.
- 1 2 Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1991) Darwin. Springer Berlin Heidelberg. p. 161. ISBN 978-3-540-29925-7. Retrieved October 2015.
- 1 2 3 "LCDB Data for (1991) Darwin". Asteroid Lightcurve Database (LCDB). Retrieved December 2015.
- 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. arXiv:1109.6407. Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. Retrieved December 2015.
- 1 2 3 Pravec, Petr; Harris, Alan W.; Kusnirák, Peter; Galád, Adrián; Hornoch, Kamil (September 2012). "Absolute magnitudes of asteroids and a revision of asteroid albedo estimates from WISE thermal observations". Icarus 221 (1): 365–387. Bibcode:2012Icar..221..365P. doi:10.1016/j.icarus.2012.07.026. Retrieved December 2015.
- 1 2 Wisniewski, W. Z.; Michalowski, T. M.; Harris, A. W.; McMillan, R. S. (March 1995). "Photoelectric Observations of 125 Asteroids". Abstracts of the Lunar and Planetary Science Conference. Bibcode:1995LPI....26.1511W. Retrieved December 2015.
- ↑ "1991 Darwin (1967 JL)". Minor Planet Center. Retrieved October 2015.
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
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