144 Vibilia

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144 Vibilia
Discovered by Christian Heinrich Friedrich Peters
Discovery date June 3, 1875
Main belt
Orbital characteristics[1][2]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 490.632 Gm (3.280 AU)
Perihelion 303.539 Gm (2.029 AU)
397.086 Gm (2.654 AU)
Eccentricity 0.236
1579.562 d (4.32 a)
18.03 km/s
Inclination 4.808°
Physical characteristics
Dimensions 141.34±2.76 km[2]
Mass (5.30±1.20)×1018 kg[2]
Mean density
3.58±0.84 g/cm3[2]
Equatorial surface gravity
0.0396 m/s²
Equatorial escape velocity
0.0750 km/s
Temperature ~171 K
9.97 (brightest)

144 Vibilia is a large, dark main belt asteroid that was discovered by C. H. F. Peters on June 3, 1875, from the observatory at Hamilton College, Clinton, New York. Peters named it after Vibilia, the Roman goddess of traveling, because he had recently returned from a journey across the world to observe the transit of Venus. Peters also discovered 145 Adeona on the same night.[3]

Based upon its spectrum, this object is classified as a C-type asteroid. This means it probably has a primitive carbonaceous composition. It is the only large member of the Vibilia asteroid family.[citation needed]

Vibilia has been observed to occult a star twice so far (in 1993 and again in 2001).[citation needed]

13-cm radar observations of this asteroid from the Arecibo Observatory between 1980 and 1985 were used to produce a diameter estimate of 131 km.[4] Based upon radar data, the near surface solid density of the asteroid is 2.4+0.7
g cm−3.[5]


  1. ^ Yeomans, Donald K., "144 Vibilia", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-30. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ Schmadel, Lutz D. (2003), Dictionary of Minor Planet Names (5th ed.), Springer, p. 63, ISBN 3540002383. 
  4. ^ Ostro, S. J.; et al. (August 1985), "Mainbelt asteroids - Dual-polarization radar observations", Science 229 (4712): 442–446, Bibcode:1985Sci...229..442O, doi:10.1126/science.229.4712.442, PMID 17738665. 
  5. ^ Magri, C.; et al. (December 2001), "Radar constraints on asteroid regolith compositions using 433 Eros as ground truth", Meteoritics & Planetary Science 36 (12): 1697–1709, Bibcode:2001M&PS...36.1697M, doi:10.1111/j.1945-5100.2001.tb01857.x. 

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