112 Iphigenia

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112 Iphigenia
Discovery
Discovered by Christian Heinrich Friedrich Peters
Discovery date 19 September 1870
Designations
MPC designation (112) Iphigenia
Named after
Iphigenia
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 145.57 yr (53169 d)
Aphelion 2.7461 AU (410.81 Gm)
Perihelion 2.12225 AU (317.484 Gm)
2.43415 AU (364.144 Gm)
Eccentricity 0.12813
3.80 yr (1387.1 d)
19.01 km/s
169.984°
0° 15m 34.308s / day
Inclination 2.6029°
323.538°
16.676°
Earth MOID 1.11284 AU (166.478 Gm)
Jupiter MOID 2.60275 AU (389.366 Gm)
Jupiter Tisserand parameter 3.493
Physical characteristics
Dimensions 72.18±4.4 km[1]
71.07 ± 0.52 km[2]
Mass (1.97 ± 6.78) × 1018 kg[2]
Mean density
10.48 ± 36.06 g/cm3[2]
Equatorial surface gravity
0.0202 m/s²
Equatorial escape velocity
0.0382 km/s
31.466 h (1.3111 d)[1][3]
0.0393±0.005
Temperature ~178 K
C
9.84

112 Iphigenia /ɪfɪɪˈn.ə/ is a fairly large and exceedingly dark main-belt asteroid. Based upon a classification as a C-type asteroid, it has probably a primitive carbonaceous composition, it was discovered by German-American astronomer C. H. F. Peters on September 19, 1870, and named after Iphigenia, the princess sacrificed by her father in Greek mythology. The orbital elements for 112 Iphigenia were published by German astronomer Friedrich Tietjen in 1871.[4]

Photometric observations of this asteroid during 2007 at the Observatorio Astronómico de Mallorca were used to create a light curve plot, which was published in 2010. This showed a relatively long synodic rotation period of 31.385 ± 0.006 hours (1.3 days) and a brightness variation of 0.30 ± 0.02 magnitude during each cycle.[5] These findings agree with independent results reported in 2008, which gave a period of 31.466 ± 0.001 hours.[3]

References[edit]

  1. ^ a b c Yeomans, Donald K., "112 Iphigenia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016. 
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336Freely accessible, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  3. ^ a b Pilcher, Frederick (June 2008), "Period Determination for 84 Klio, 98 Ianthe, 102 Miriam 112 Iphigenia, 131 Vala, and 650 Amalasuntha", The Minor Planet Bulletin, 35 (2), pp. 71–72, Bibcode:2008MPBu...35...71P, doi:10.1016/j.pss.2012.03.009. 
  4. ^ Tietjen, F. (May 1871), "Elemente der (112) Iphigenia. Aus einem Schreiben des Herrn Dr. F. Tietjen an den Herausgeber", Astronomische Nachrichten, 77, p. 297, Bibcode:1871AN.....77..297T, doi:10.1002/asna.18710771903. 
  5. ^ Cikota, Stefan; Cikota, Aleksandar (July 2010), "Lightcurve Photometry of 112 Iphigenia", The Minor Planet Bulletin, 37 (3), p. 107, Bibcode:2010MPBu...37Q.107C, doi:10.1016/j.pss.2012.03.009. 

External links[edit]