2094 Magnitka (prov. designation: 1971 TC2) is a Flora asteroid from the inner regions of the asteroid belt, approximately 12 kilometers (7.5 miles) in diameter. It was discovered on 12 October 1971, at and by the Crimean Astrophysical Observatory in Nauchnyj, on the Crimean peninsula.[12] The discovery has not been attributed to an observing astronomer. It was later named for the city of Magnitogorsk.[2]
_Magnitka.png) Shape model of Magnitka from its lightcurve | |
| Discovery [1] | |
|---|---|
| Discovered by | Crimean Astrophysical Obs. |
| Discovery site | Crimean Astrophysical Obs. |
| Discovery date | 12 October 1971 |
| Designations | |
| (2094) Magnitka | |
Named after | Magnitogorsk (Russian city)[2] |
| 1971 TC2 · 1941 WK 1951 WP · 1956 EB 1964 TD · 1968 WE 1977 FG | |
| main-belt · Flora [3] | |
| Orbital characteristics [1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 75.36 yr (27,524 days) |
| Aphelion | 2.4474 AU |
| Perihelion | 2.0170 AU |
| 2.2322 AU | |
| Eccentricity | 0.0964 |
| 3.34 yr (1,218 days) | |
| 149.03° | |
| 0° 17m 43.8s / day | |
| Inclination | 5.0289° |
| 281.93° | |
| 251.58° | |
| Physical characteristics | |
| 9.91±0.58 km[4] 10.121±0.408 km[5] 12.053±0.055 km[6] 12.167 km[7] 12.17 km (taken)[3] 12.58±1.04 km[8] 12.69±1.1 km[9] | |
| 6.11±0.02 h[10] 6.1124±0.0002 h[a] 6.24±0.01 h[11] | |
| 0.120[3][7] 0.1278±0.0129[6] 0.132±0.025[5] 0.1739±0.035[9] 0.194±0.042[8] 0.285±0.036[4] | |
| S [3] | |
| 11.90[8] · 12.0±0.2 (R)[a] · 12.0[4][9] · 12.1[1] · 12.45[6] · 12.49±0.206[7] · 12.49[3] | |
Orbit and classification
editMagnitka is a member of the Flora family, one of the largest families of stony asteroids. It orbits the Sun in the inner main-belt at a distance of 2.0–2.4 AU once every 3 years and 4 months (1,218 days). Its orbit has an eccentricity of 0.10 and an inclination of 5° with respect to the ecliptic.[1] It was first identified as 1941 WK at the Finnish Turku Observatory, extending the body's observation arc by 30 years prior to its official discovery observation.[12]
Naming
editThis minor planet was named for the city of Magnitogorsk, Russia, one of the largest centers of metallurgy of the former Soviet Union.[2] The city is located at the far-east of the Ural Mountains, about 250 kilometers southwest of the city of Chelyabinsk in the Chelyabinsk Oblast region, also known for the spectacular air-burst of the Chelyabinsk meteor in 2013. The official naming citation was published by the Minor Planet Center on 1 April 1980 (M.P.C. 5282).[13]
Physical characteristics
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Lightcurves
editIn October 2006, two rotational lightcurves for Magnitka were obtained from photometric observations by Petr Pravec at Ondřejov Observatory and by John Menke at his Menke Observatory, respectively. Lightcurve analysis gave a concurring rotation period of 6.11 hours with a brightness variation of 0.80 and 0.86 magnitude (U=3-/n.a.), respectively, indicating a non-spheroidal shape for Magnitka.[10][a] In March 2016, Pierre Antonini obtained a tentative lightcurve, which gave a period of 6.24 hours and an amplitude of 0.85 (U=2+).[11]
Diameter and albedo
editAccording to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, the asteroid measures between 9.9 and 12.7 kilometers in diameter and its surface has an albedo between 0.132.[4][5][6][7][8][9] The Collaborative Asteroid Lightcurve Link agrees with Pravec's revised thermal WISE data,[7] taking an albedo of 0.12, and a diameter of 12.17 kilometers with an absolute magnitude of 12.49.[3]
Notes
edit- ^ a b c Pravec (2006): Observed on 26 January 2006; rotation period of 6.1124±0.0002 hours; brightness amplitude of 0.86 magnitude; no quality code assessment. Summary figures for (2094) Magnitka at Light Curve Database
References
edit- ^ a b c d "JPL Small-Body Database Browser: 2094 Magnitka (1971 TC2)" (2017-03-26 last obs.). Jet Propulsion Laboratory. Retrieved 3 July 2017.
- ^ a b c Schmadel, Lutz D. (2007). "(2094) Magnitka". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 170. doi:10.1007/978-3-540-29925-7_2095. ISBN 978-3-540-00238-3.
- ^ a b c d e f "LCDB Data for (2094) Magnitka". Asteroid Lightcurve Database (LCDB). Retrieved 7 December 2016.
- ^ a b c d Usui, Fumihiko; Kuroda, Daisuke; Müller, Thomas G.; Hasegawa, Sunao; Ishiguro, Masateru; Ootsubo, Takafumi; et al. (October 2011). "Asteroid Catalog Using Akari: AKARI/IRC Mid-Infrared Asteroid Survey". Publications of the Astronomical Society of Japan. 63 (5): 1117–1138. Bibcode:2011PASJ...63.1117U. doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153)
- ^ a b c Masiero, Joseph R.; Grav, T.; Mainzer, A. K.; Nugent, C. R.; Bauer, J. M.; Stevenson, R.; et al. (August 2014). "Main-belt Asteroids with WISE/NEOWISE: Near-infrared Albedos". The Astrophysical Journal. 791 (2): 11. arXiv:1406.6645. Bibcode:2014ApJ...791..121M. doi:10.1088/0004-637X/791/2/121. Retrieved 7 December 2016.
- ^ a b c d 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.
- ^ a b c d e 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 7 December 2016.
- ^ a b c d Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Nugent, C.; et al. (November 2012). "Preliminary Analysis of WISE/NEOWISE 3-Band Cryogenic and Post-cryogenic Observations of Main Belt Asteroids". The Astrophysical Journal Letters. 759 (1): 5. arXiv:1209.5794. Bibcode:2012ApJ...759L...8M. doi:10.1088/2041-8205/759/1/L8. Retrieved 7 December 2016.
- ^ a b c d Tedesco, E. F.; Noah, P. V.; Noah, M.; Price, S. D. (October 2004). "IRAS Minor Planet Survey V6.0". NASA Planetary Data System. 12: IRAS-A-FPA-3-RDR-IMPS-V6.0. Bibcode:2004PDSS...12.....T. Retrieved 22 October 2019.
- ^ a b Menke, John; Cooney, Walt; Gross, John; Terrell, Dirk; Higgins, David (October 2008). "Asteroid Lightcurve Analysis at Menke Observatory". The Minor Planet Bulletin. 35 (4): 155–160. Bibcode:2008MPBu...35..155M. ISSN 1052-8091. Retrieved 7 December 2016.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2094) Magnitka". Geneva Observatory. Retrieved 1 September 2016.
- ^ a b "2094 Magnitka (1971 TC2)". Minor Planet Center. Retrieved 7 December 2016.
- ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 7 December 2016.