2449 Kenos
| Discovery [1] | |
|---|---|
| Discovered by | W. Liller |
| Discovery site | Cerro Tololo |
| Discovery date | 8 April 1978 |
| Designations | |
| 2449 Kenos | |
Named after | Kenos (Selknam mythology)[2] |
| 1978 GC | |
| Mars-crosser [1] · Hungaria [3][4] | |
| Orbital characteristics [1] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 37.50 yr (13696 days) |
| Aphelion | 2.2301 AU (333.62 Gm) |
| Perihelion | 1.5875 AU (237.49 Gm) |
| 1.9088 AU (285.55 Gm) | |
| Eccentricity | 0.16832 |
| 2.64 yr (963.29 d) | |
| 34.252° | |
| 0° 22m 25.392s / day | |
| Inclination | 24.986° |
| 179.86° | |
| 102.32° | |
| Earth MOID | 0.7114 AU |
| Physical characteristics | |
| Dimensions | 2.95 km (calculated)[4] |
| 4.188±0.007 h[5] 3.8492±0.0008 h[6] 3.846±0.001 h[7] 3.8481±0.0003 h[8] | |
| 0.4 (assumed)[4] | |
| B–V = 0.684[1] U–B = 0.356[1] Tholen = E [1] CX [9] · E [4] | |
| 14.07±0.09[5] 14.26[1][4] 14.46±0.48[9] | |
2449 Kenos, provisional designation 1978 GC, is a bright stony asteroid and medium-sized Mars-crosser from the inner regions of the asteroid belt, about 3 kilometers in diameter. It was discovered by American astronomer William Liller at Cerro Tololo Inter-American Observatory in Chile, on 8 April 1978.[3]
The E-type asteroid is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. Kenos orbits the Sun at a distance of 1.6–2.2 AU once every 2 years and 8 months (963 days). Its orbit shows an eccentricity of 0.17 and is notably tilted by 25 degrees to the plane of the ecliptic. Based on assumption made by the Collaborative Asteroid Lightcurve Link, the body has a high albedo of 0.4, which is typical for E-type asteroids with a magnesium silicate surface (also see Enstatite chondrite).
Observations performed at the Palmer Divide Observatory in Colorado Springs, Colorado during 2007 produced a light-curve with a period of 3.8492±0.0008 hours and a brightness range of 0.20±0.03 in magnitude.[6] Two more recent observations confirmed the 3.85-hour period.[7][8]
The minor planet was named after Kenos, the first man in the Selknam mythology of the Native Americans of Tierra del Fuego, sent by the Supreme Being to bring order into the world. He created the human race by using peat to make male and female organs, taught them language and instructed them in rules to fashion a harmonious society.[2] Naming citation was published on 6 February 1993 (M.P.C. 21606).[10]
References
- ^ a b c d e f g "JPL Small-Body Database Browser: 2449 Kenos (1978 GC)" (2016-11-11 last obs.). Jet Propulsion Laboratory. Retrieved 6 December 2016.
- ^ a b Schmadel, Lutz D. (2007). Dictionary of Minor Planet Names – (2449) Kenos. Springer Berlin Heidelberg. pp. 199–200. ISBN 978-3-540-00238-3. Retrieved 6 December 2016.
- ^ a b "2449 Kenos (1978 GC)". Minor Planet Center. Retrieved 6 December 2016.
- ^ a b c d e "LCDB Data for (2449) Kenos". Asteroid Lightcurve Database (LCDB). Retrieved 6 December 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 6 December 2016.
- ^ a b Warner, Brian D. (September 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - December 2006 - March 2007". The Minor Planet Bulletin. 34 (3): 72–77. Bibcode:2007MPBu...34...72W. ISSN 1052-8091. Retrieved 6 December 2016.
- ^ a b Warner, Brian D. (October 2010). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2010 March - June". The Minor Planet Bulletin. 37 (4): 161–165. Bibcode:2010MPBu...37..161W. ISSN 1052-8091. Retrieved 6 December 2016.
- ^ a b Warner, Brian D. (July 2015). "Three Unusual Hungaria Asteroids". The Minor Planet Bulletin. 42 (3): 183–186. Bibcode:2015MPBu...42..183W. ISSN 1052-8091. Retrieved 6 December 2016.
- ^ a b 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 6 December 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 6 December 2016.
External links
- The Palmer Divide Observatory: Tour given by Brian Warner on YouTube (time 4:03 min.)
- 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
- 2449 Kenos at the JPL Small-Body Database
