12 Victoria

12 Victoria

Model of 12 Victoria made by light-curve inversion.
Discovery
Discovered by John Russell Hind
Discovery date 13 September 1850
Designations
Pronunciation /vɪkˈtɔəriə/
Named after
 Victoria (Latin: Uictōria)
none
Main belt
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 60430 days (165.45 yr)
Aphelion 2.84931 AU (426.251 Gm)
Perihelion 1.81758 AU (271.906 Gm)
2.33344 AU (349.078 Gm)
Eccentricity 0.22108
3.56 yr (1302.0 d)
19.50 km/s
161.809°
0° 16m 35.429s / day
Inclination 8.36859°
235.482°
69.5103°
Earth MOID 0.821096 AU (122.8342 Gm)
Jupiter MOID 2.42194 AU (362.317 Gm)
Jupiter Tisserand parameter 3.522
Physical characteristics
Dimensions 112.8 ± 3.1 km (IRAS)[1]
124.09 ± 8.31 km[2]
Mean radius
 56.385 ± 1.55 km
Mass (2.45 ± 0.46) × 1018 kg[2]
Mean density
 2.45 ± 0.67 g/cm3[2]
Equatorial surface gravity
 0.0315 m/s²
Equatorial escape velocity
 0.0596 km/s
8.6599 h (0.36083 d)[1]
0.1765 ± 0.010[1]
Temperature ~178 K
S-type asteroid[1]
8.68[3] to 12.82
7.24[1]
0.188" to 0.04"

    12 Victoria is a large main-belt asteroid.

    It was discovered by J. R. Hind on September 13, 1850.

    Victoria is officially named after the Roman goddess of victory, but the name also honours Queen Victoria. The goddess Victoria (Nike for the Greeks) was the daughter of Styx by the Titan Pallas. The coincidence with the name of the then-reigning queen caused quite a controversy at the time, and B. A. Gould, editor of the prestigious Astronomical Journal, adopted the alternate name Clio (now used by 84 Klio), proposed by the discoverer. However, W. C. Bond, of the Harvard College Observatory, then the highest authority on astronomy in America, held that the mythological condition was fulfilled and the name therefore acceptable, and his opinion eventually prevailed.[4]

    Radar and speckle interferometry observations show that the shape of Victoria is elongated, and it is suspected to be a binary asteroid, with a moon of irregular shape.[5]

    Victoria has only ever been observed to occult a star thrice since its discovery.

    See also

    References

    1. 1 2 3 4 5 6 "JPL Small-Body Database Browser: 12 Victoria" (2008-11-06 last obs). Retrieved 8 April 2016.
    2. 1 2 3 Carry, B. (December 2012). "Density of asteroids". Planetary and Space Science. 73: 98–118. arXiv:1203.4336Freely accessible. Bibcode:2012P&SS...73...98C. doi:10.1016/j.pss.2012.03.009. See Table 1.
    3. ↑ "AstDys (12) Victoria Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-06-26.
    4. ↑ Schmadel, Lutz D. (2003). Dictionary of minor planet names. 1 (5th ed.). Berlin Heidelberg New York: Springer-Verlag. p. 16. ISBN 3-540-00238-3.
    5. ↑ Other reports of asteroid/TNO companions

    External links

    This article is issued from Wikipedia - version of the 9/9/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.