758 Mancunia

"Mancunia" redirects here. For the city whose inhabitants are known as Mancunians, see Manchester.

758 Mancunia

Discovery
Discovered by	H. E. Wood
Discovery site	Johannesburg
Discovery date	18 May 1912
Designations
MPC designation	(758) Mancunia
Pronunciation	/mænˈkjuːniə/[1]
Alternative designations	1912 PE
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc	101.39 yr (37034 d)
Aphelion	3.6704 AU (549.08 Gm)
Perihelion	2.7081 AU (405.13 Gm)
Semi-major axis	3.1893 AU (477.11 Gm)
Eccentricity	0.15086
Orbital period (sidereal)	5.70 yr (2080.3 d)
Mean anomaly	260.973°
Mean motion	0° 10^m 22.98^s / day
Inclination	5.6102°
Longitude of ascending node	106.200°
Argument of perihelion	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) × 10^17 kg[3]
Mean density	2.69 ± 0.26 g/cm^3[3]
Synodic 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 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

1. "Mancunian". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
2. "758 Mancunia (1912 PE)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
3. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, vol. 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
4. 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.
5. Shepard, Michael K.; et al. (May 2008), "A radar survey of M- and X-class asteroids", Icarus, 195 (1): 184–205, Bibcode:2008Icar..195..184S, doi:10.1016/j.icarus.2007.11.032.

External links

• Lightcurve plot of 758 Mancunia, Palmer Divide Observatory, B. D. Warner (2006)
• 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
• 758 Mancunia at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
• 758 Mancunia at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters