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Proserpina (minor planet designation: 26 Proserpina) is a main-belt asteroid discovered by R. Luther on May 5, 1853. It is named after the Roman goddess Proserpina, the daughter of Ceres and the Queen of the Underworld.

26 Proserpina 26 Proserpina symbol.svg
A713.M1189.shape.png
Three-dimensional model of 26 Proserpina created based on light-curve inversions.
Discovery
Discovered byR. Luther
Discovery dateMay 5, 1853
Designations
MPC designation(26) Proserpina
Pronunciation/prˈsɜːrpɪnə/ proh-SUR-pi-nə
Named after
Proserpina
1935 KK; 1954 WD1
Main belt
Orbital characteristics
Epoch June 14, 2006 (JD 2453900.5)
Aphelion431.898 Gm (2.887 AU)
Perihelion362.816 Gm (2.425 AU)
397.357 Gm (2.656 AU)
Eccentricity0.087
1581.184 d (4.33 a)
115.619°
Inclination3.562°
45.884°
193.120°
Physical characteristics
Dimensions94.8 ± 1.7 km (IRAS)[1]
89.63 ± 3.55 km[2]
Mass(7.48 ± 8.95) × 1017 kg[2]
Mean density
1.98 ± 2.38 g/cm3[2]
13.11 h[1][3]
0.1966[1][4]
S[1]
7.5[1]

Photometric observations of this asteroid have produced discrepant estimates of the rotation period. A period of 12.13 hours was reported in 1979, followed by 10.6 hours in 1981 and 6.67 hours in 2001. Observations made in 2007 at the Oakley Observatory in Terre Haute, Indiana produced a light curve with a period of 13.06 ± 0.03 hours and a brightness variation of 0.21 ± 0.01 in magnitude.[5] This was refined by a 2008 study, giving a period of 13.110 ± 0.001 hours.[6]

ReferencesEdit

  1. ^ a b c d e "JPL Small-Body Database Browser: 26 Proserpina" (2011-12-30 last obs). Jet Propulsion Laboratory. Retrieved 2012-01-28.
  2. ^ a b c 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.
  3. ^ http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_DERIVED_LIGHTCURVE_V8_0/data/lc.tab
  4. ^ http://www.psi.edu/pds/asteroid/EAR_A_5_DDR_ALBEDOS_V1_1/data/albedos.tab
  5. ^ Ditteon, Richard; Hawkins, Scot (September 2007), "Asteroid Lightcurve Analysis at the Oakley Observatory - October-November 2006", The Minor Planet Bulletin, 34 (3), pp. 59–64, Bibcode:2007MPBu...34...59D.
  6. ^ Pilcher, Frederick (September 2008), "Period Determinations for 26 Proserpina, 34 Circe 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta", The Minor Planet Bulletin, 35 (3), pp. 135–138, Bibcode:2008MPBu...35..135P.

External linksEdit