astro.wikisort.org - Asteroid
2449 Kenos, provisional designation 1978 GC, is a bright Hungaria asteroid and medium-sized Mars-crosser from the inner regions of the asteroid belt, approximately 3 kilometers in diameter. It was discovered by American astronomer William Liller at Cerro Tololo Inter-American Observatory in Chile, on 8 April 1978, and named after Kenos from Selknam mythology.[2][3] A minor-planet moon was discovered around the asteroid on 27 February 2015.[10]
| Discovery [1] | |
|---|---|
| Discovered by | W. Liller |
| Discovery site | Cerro Tololo |
| Discovery date | 8 April 1978 |
| Designations | |
MPC designation | (2449) Kenos |
Named after | Kenos (Selknam mythology)[2] |
Alternative designations | 1978 GC |
Minor planet category | Mars-crosser [1] · Hungaria [3] · binary |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 38.93 yr (14,220 days) |
| Aphelion | 2.2303 AU |
| Perihelion | 1.5872 AU |
Semi-major axis | 1.9088 AU |
| Eccentricity | 0.1685 |
Orbital period (sidereal) | 2.64 yr (963 days) |
Mean anomaly | 258.57° |
Mean motion | 0° 22m 25.32s / day |
| Inclination | 24.986° |
Longitude of ascending node | 179.86° |
Argument of perihelion | 102.25° |
| Physical characteristics | |
| Dimensions | 2.95 km (calculated)[4] |
Synodic rotation period | 3.846±0.001 h[5] 3.8481±0.0003 h[6] 3.8492±0.0008 h[7] 4.188±0.007 h[8] |
Geometric albedo | 0.4 (assumed)[4] |
Spectral type | Tholen = E [1] · CX [9] · E [4] B–V = 0.684[1] U–B = 0.356[1] |
Absolute magnitude (H) | 14.07±0.09[8] · 14.26[1][4] · 14.46±0.48[9] |
Orbit and classification
Kenos is a member of the Hungaria family, which form the innermost dense concentration of asteroids in the Solar System. IT orbits the Sun in the inner main-belt at a distance of 1.6–2.2 AU once every 2 years and 8 months (963 days). Its orbit has an eccentricity of 0.17 and an inclination of 25° with respect to the ecliptic.[1] 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).
Physical characteristics
In the Tholen taxonomy, Kenos is an E-type asteroid.[1] PanSTARRS has characterized it as a CX-type, which transitions between the C-type and X-type asteroids.[9]
Observations performed at the Palmer Divide Observatory (716) in Colorado Springs, Colorado, during 2007 produced a lightcurve with a period of 3.8492 hours and a brightness range of 0.20 in magnitude.[7] Two more recent observations confirmed the 3.85-hour period.[5][6]
Naming
This 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] The official naming citation was published by the Minor Planet Center on 6 February 1993 (M.P.C. 21606).[11]
References
- "JPL Small-Body Database Browser: 2449 Kenos (1978 GC)" (2017-03-14 last obs.). Jet Propulsion Laboratory. Archived from the original on 20 September 2020. Retrieved 13 June 2017.
- Schmadel, Lutz D. (2007). "(2449) Kenos". Dictionary of Minor Planet Names – (2449) Kenos. Springer Berlin Heidelberg. pp. 199–200. doi:10.1007/978-3-540-29925-7_2450. ISBN 978-3-540-00238-3.
- "2449 Kenos (1978 GC)". Minor Planet Center. Retrieved 6 December 2016.
- "LCDB Data for (2449) Kenos". Asteroid Lightcurve Database (LCDB). Retrieved 6 December 2016.
- 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.
- 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.
- 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.
- 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. 26: 1511. Bibcode:1995LPI....26.1511W. Retrieved 6 December 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 6 December 2016.
- Johnston, W. R. (29 May 2019). "(2449) Kenos". Asteroids with Satellites Database. Johnston's Archive. Retrieved 23 November 2019.
- "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.)
- Lightcurve plot of 2449 Kenos, Palmer Divide Observatory, B. D. Warner (2010)
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- 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 AstDyS-2, Asteroids—Dynamic Site
- 2449 Kenos at the JPL Small-Body Database
На других языках
[de] (2449) Kenos
(2449) Kenos (1978 GC) ist ein Asteroid des inneren Hauptgürtels, der am 2. November 1975 vom US-amerikanischen Astronomen William Liller am Cerro Tololo Inter-American Observatory ungefähr 80 km östlich von La Serena in Chile (IAU-Code 807) entdeckt wurde.- [en] 2449 Kenos
[ru] (2449) Кенос
(2449) Кенос (лат. Kenos) — небольшой астероид, который относится к группе астероидов пересекающих орбиту Марса и принадлежащий к яркому спектральному классу E. Он был открыт 8 апреля 1978 года чилийским астрономом Уильямом Лиллером[en] в обсерватории Серро-Тололо и назван в честь первого мужчины в мифологии аборигенов Огненной Земли[2].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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