1355 Magoeba
| Discovery [1] | |
|---|---|
| Discovered by | C. Jackson |
| Discovery site | Johannesburg Obs. |
| Discovery date | 30 April 1935 |
| Designations | |
| 1355 Magoeba | |
Named after | Magoeba (a native chief)[2] |
| 1935 HE | |
| main-belt (inner) · Hungaria [3] | |
| Orbital characteristics [1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 80.97 yr (29573 days) |
| Aphelion | 1.9363 AU (289.67 Gm) |
| Perihelion | 1.7707 AU (264.89 Gm) |
| 1.8535 AU (277.28 Gm) | |
| Eccentricity | 0.044654 |
| 2.52 yr (921.69 d) | |
| 89.838° | |
| 0° 23m 26.124s / day | |
| Inclination | 22.826° |
| 225.26° | |
| 340.20° | |
| Earth MOID | 0.765815 AU (114.5643 Gm) |
| Jupiter MOID | 3.04836 AU (456.028 Gm) |
| TJupiter | 3.906 |
| Physical characteristics | |
| Dimensions | 4.828±0.094 km[4] 5.96 km (calculated)[3] |
| 2.9712 h (0.12380 d)[1][5] 32.9±0.1 h[6] 31.65±0.005 h[7] 5.99±0.05 h[8] 2.972±0.002 h[9] | |
| 0.267±0.095[10] 0.4663±0.0824[4] 0.3 (assumed)[3] | |
| B–V = 0.713 U–B = 0.255 Tholen = X X [3] | |
| 13.05 | |
1355 Magoeba, provisional designation 1935 HE, is a bright asteroid from the inner regions of the asteroid belt, about 5 kilometers in diameter. It was discovered on 30 April 1935, by English-born, South African astronomer Cyril Jackson at the Union Observatory in Johannesburg, South Africa.[11]
The asteroid is a member of the Hungaria family, that form the innermost dense concentration of asteroids in the Solar System. It orbits the Sun at a distance of 1.8–1.9 AU once every 2 years and 6 months (922 days). Its orbit shows an eccentricity of 0.04 and is significantly tilted by 23 degrees to the plane of the ecliptic.
The body's rotation around its own axis has been measured several times at the Palmer Divide Observatory (see video in § External links) with divergent results. A more recent light-curve observation in September 2014 found a rotation period of 2.971 hours[5] significantly shorter than some previous photometric observations. The X-type asteroid has a bright geometric albedo between 0.27 and 0.47.[4] While observations at the Argentinian Lencito Complex in 2007 categorize the asteroid in the metallic M-type class,[10]: 1112 bodies with an albedo above 0.30 are usually not classified as metallic M-types but rather as E or Xe subtypes.
The minor planet was named after Magoeba, a native chief of the North Transvaal in South Africa.[2]
References
- ^ a b c "JPL Small-Body Database Browser: 1355 Magoeba (1935 HE)" (2015-03-11 last obs.). Jet Propulsion Laboratory. Retrieved 27 April 2016.
- ^ a b Schmadel, Lutz D. (2003). Dictionary of Minor Planet Names – (1355) Magoeba. Springer Berlin Heidelberg. p. 110. ISBN 978-3-540-29925-7. Retrieved 24 November 2015.
- ^ a b c d "LCDB Data for (1355) Magoeba". Asteroid Lightcurve Database (LCDB). Retrieved 24 November 2015.
- ^ a b c 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 24 November 2015.
- ^ a b Warner, Brian D. (January 2015). "A Sextet of Main-belt Binary Asteroid Candidates". The Minor Planet Bulletin. 42 (1): 60–66. Bibcode:2015MPBu...42...60W. ISSN 1052-8091. Retrieved 24 November 2015.
- ^ Warner, Brian D. (March 2007). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory - June-September 2006". The Minor Planet Bulletin. 34 (1): 8–10. Bibcode:2007MPBu...34....8W. ISSN 1052-8091. Retrieved 24 November 2015.
- ^ Warner, Brian D. (April 2010). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2009 September-December". The Minor Planet Bulletin. 37 (2): 57–64. Bibcode:2010MPBu...37...57W. ISSN 1052-8091. Retrieved 24 November 2015.
- ^ Warner, Brian D. (October 2011). "Asteroid Lightcurve Analysis at the Palmer Divide Observatory: 2011 March - July". The Minor Planet Bulletin. 38 (4): 190–195. Bibcode:2011MPBu...38..190W. ISSN 1052-8091. Retrieved 24 November 2015.
- ^ Warner, Brian D. (October 2013). "Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2013 May-June". The Minor Planet Bulletin. 40 (4): 208–212. Bibcode:2013MPBu...40..208W. ISSN 1052-8091. Retrieved 24 November 2015.
- ^ a b Gil-Hutton, R.; Lazzaro, D.; Benavidez, P. (June 2007). "Polarimetric observations of Hungaria asteroids". Astronomy and Astrophysics. 468 (3): 1109–1114(A&AHomepage). Bibcode:2007A&A...468.1109G. doi:10.1051/0004-6361:20077178. Retrieved 24 November 2015.
- ^ "1355 Magoeba (1935 HE)". Minor Planet Center. Retrieved 24 November 2015.
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
- 1355 Magoeba at the JPL Small-Body Database
- Dynamical evolution of the Hungaria asteroids
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