Astronomy:758 Mancunia
| Discovery | |
|---|---|
| Discovered by | H. E. Wood |
| Discovery site | Johannesburg |
| Discovery date | 18 May 1912 |
| Designations | |
| (758) Mancunia | |
| Pronunciation | /mænˈkjuːniə/[1] |
| 1912 PE | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 101.39 yr (37034 d) |
| |{{{apsis}}}|helion}} | 3.6704 astronomical unit|AU (549.08 Gm) |
| |{{{apsis}}}|helion}} | 2.7081 AU (405.13 Gm) |
| 3.1893 AU (477.11 Gm) | |
| Eccentricity | 0.15086 |
| Orbital period | 5.70 yr (2080.3 d) |
| Mean anomaly | 260.973° |
| Mean motion | 0° 10m 22.98s / day |
| Inclination | 5.6102° |
| Longitude of ascending node | 106.200° |
| 314.999° | |
| Earth MOID | 1.72323 AU (257.792 Gm) |
| Jupiter MOID | 1.66575 AU (249.193 Gm) |
| TJupiter | 3.172 |
| Physical characteristics | |
| Mean radius | 42.74±3.35 km[2] 43.54 ± 0.655 km[3] |
| Mass | (9.31 ± 0.80) × 1017 kg[3] |
| Mean density | 2.69 ± 0.26 g/cm3[3] |
| Rotation period | 12.7253 h (0.53022 d) |
| Geometric albedo | 0.1317±0.023 |
| Absolute magnitude (H) | 8.16 |
758 Mancunia is a minor planet orbiting the Sun. It was discovered in 1912 from Johannesburg by H. E. Wood, a Mancunian. This object is orbiting at a distance of 3.19 astronomical unit|AU with a period of 5.70 years and an eccentricity (ovalness) of 0.15. The orbital plane is inclined at an angle of 5.61° to the plane of the ecliptic.[2]
Observation of this asteroid in 1996 suggested a rotation period of 6.902 hours. However, radar observations from Arecibo indicated this may be in error. Independent photometry measurements made during December 2006 were combined to determine an estimated period nearly double that of the original, or 12.7253±0.0006 h with a brightness variation amplitude of 0.26±0.02 in magnitude.[4] A high radar albedo indicates this object is most likely metallic. Dips in the radar echo suggests there are large concavities on both sides. It is classified as an X-type asteroid in the Tholen taxonomy and spans a girth of 85±7 km.[5]
References
- ↑ Mancunian (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Mancunian (Subscription or UK public library membership required.)
- ↑ 2.0 2.1 2.2 "758 Mancunia (1912 PE)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=758.
- ↑ 3.0 3.1 3.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ Warner, Brian D.; Behrend, Raoul; Poncy, Raymond; Coliac, Jean-Francois (March 2008), "Lightcurve Analysis of 758 Mancunia", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 35 (1): 25, Bibcode: 2008MPBu...35...25W.
- ↑ Shepard, Michael K. et al. (May 2008), "A radar survey of M- and X-class asteroids", Icarus 195 (1): 184–205, doi:10.1016/j.icarus.2007.11.032, Bibcode: 2008Icar..195..184S.
External links
- Lightcurve plot of 758 Mancunia, Palmer Divide Observatory, B. D. Warner (2006)
- 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
- 758 Mancunia at AstDyS-2, Asteroids—Dynamic Site
- 758 Mancunia at the JPL Small-Body Database
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