94 Aurora

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Not to be confused with Aurora borealis.
94 Aurora
94Aurora (Lightcurve Inversion).png
A three-dimensional model of 94 Aurora based on its light curve.
Discovery
Discovered by James Craig Watson
Discovery date 6 September 1867
Designations
Pronunciation /əˈrɔərə/
Named after
Aurōra
 
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 143.72 yr (52494 d)
Aphelion 3.45175 AU (516.374 Gm)
Perihelion 2.86831 AU (429.093 Gm)
3.16003 AU (472.734 Gm)
Eccentricity 0.092315
5.62 yr (2051.8 d)
16.73 km/s
132.718°
0° 10m 31.638s / day
Inclination 7.97343°
2.59859°
60.8260°
Earth MOID 1.88997 AU (282.735 Gm)
Jupiter MOID 1.87561 AU (280.587 Gm)
Jupiter Tisserand parameter 3.184
Physical characteristics
Dimensions 204.89±3.6 km (IRAS)[1]
225×173 km[2]
Mass (6.23 ± 3.64) × 1018 kg[3]
Mean density
1.83 ± 1.10[3] g/cm3
Equatorial surface gravity
0.0573 m/s²
Equatorial escape velocity
0.1083 km/s
7.22 h (0.301 d)[1]
0.0395±0.001[1]
0.0395[4]
Temperature ~157 K
C[1]
7.57[1]

94 Aurora is one of the largest main-belt asteroids. With an albedo of only 0.04, it is darker than soot, and has a primitive compositions consisting of carbonaecous material. It was discovered by J. C. Watson on September 6, 1867, in Ann Arbor, and named after Aurora, the Roman goddess of the dawn.

Observations of an occultation using nine chords indicate an oval outline of 225×173 km.[2]

References[edit]

  1. ^ a b c d e f "JPL Small-Body Database Browser: 94 Aurora" (2008-11-09 last obs). Retrieved 13 May 2016. 
  2. ^ a b "Occultation of TYC 6910-01938-1 by (94) Aurora - 2001 October 12". Royal Astronomical Society of New Zealand. Retrieved 2008-11-30.  (Chords)
  3. ^ a b Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  4. ^ Asteroid Data Sets

External links[edit]