4435 Holt
| Discovery [1] | |
|---|---|
| Discovered by | C. Shoemaker |
| Discovery site | Palomar Obs. |
| Discovery date | 13 January 1983 |
| Designations | |
| 4435 Holt | |
Named after | Henry E. Holt (astronomer)[2] |
| 1983 AG2 · 1978 PZ2 | |
| Mars-crosser [1][3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 36.71 yr (13,408 days) |
| Aphelion | 3.0935 AU |
| Perihelion | 1.5399 AU |
| 2.3167 AU | |
| Eccentricity | 0.3353 |
| 3.53 yr (1,288 days) | |
| 207.39° | |
| 0° 16m 46.2s / day | |
| Inclination | 21.908° |
| 330.93° | |
| 110.11° | |
| Earth MOID | 0.6784 AU |
| Physical characteristics | |
| Dimensions | 6.44 km (derived)[3] |
| 0.20 (assumed)[3] | |
| SMASS = S [1][3] | |
| 13.1[1] 13.32±0.11[4][5] | |
4435 Holt, provisional designation 1983 AG2, is a stony asteroid, classified as an eccentric Mars-crosser, approximately 6 kilometers in diameter. It was discovered by American female astronomer Carolyn Shoemaker at the U.S. Palomar Observatory in California, on 13 January 1983.[6]
The S-type asteroid orbits the Sun at a distance of 1.5–3.1 AU once every 3 years and 6 months (1,288 days). Its orbit has a high eccentricity of 0.34 and an inclination of 22° with respect to the plane of the ecliptic.[1] The first precovery was taken at Crimea-Nauchnij in 1978, extending the asteroid's observation arc by 5 years prior to its discovery.[6]
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and derives a diameter of 6.4 kilometer, based on its absolute magnitude of 13.32.[3][4][5] The asteroid's rotation period still remains unknown.[3]
The minor planet was named for American planetary geologist and astronomer Henry E. Holt, at NAU and USGS, who has explored the surface of the Moon, its geology and photometric properties during the Apollo and Surveyor programs. After his retirement, he was a principal participant in the Palomar Asteroid and Comet Survey (PACS) from 1983 to 1993.[7] Holt has discovered and co-discovered six comets and 683 minor planets between 1989 and 1993,[8] including 4581 Asclepius,[9] a potentially hazardous asteroid that has made the closest approach to Earth of all numbered asteroids.[2] Naming citation was published on 30 January 1991 (M.P.C. 17656).[10]
References
- ^ a b c d e f "JPL Small-Body Database Browser: 4435 Holt (1983 AG2)" (2015-04-24 last obs.). Jet Propulsion Laboratory. Retrieved 25 January 2016.
- ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (4435) Holt. Springer Berlin Heidelberg. p. 381. ISBN 978-3-540-00238-3. Retrieved 25 January 2016.
- ^ a b c d e f "LCDB Data for (4435) Holt". Asteroid Lightcurve Database (LCDB). Retrieved 17 May 2016.
- ^ a b 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 17 May 2016.
- ^ a b 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 17 May 2016.
- ^ a b "4435 Holt (1983 AG2)". Minor Planet Center. Retrieved 25 January 2016.
- ^ Shoemaker, C. S.; Holt, H. E.; Shoemaker, E. M.; Bowell, E.; Levy, D. H. (December 1992). "The Palomar Asteroid and Comet Survey (PACS), 1983-1993". Abstracts for the IAU Symposium 160: Asteroids: 269. Bibcode:1993LPICo.810..269S. Retrieved 25 January 2016.
- ^ "Minor Planet Discoverers (by number)". Minor Planet Center. 22 March 2016. Retrieved 26 April 2016.
- ^ "4581 Asclepius (1989 FC)". Minor Planet Center. Retrieved 26 April 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
- 4435 Holt at the JPL Small-Body Database
