112 Iphigenia

112 Iphigenia
Discovery
Discovered by Christian Heinrich Friedrich Peters
Discovery date September 19, 1870
Designations
Named after
 Iphigenia
Main belt
Orbital characteristics[1]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 410.610 Gm (2.745 AU)
Perihelion 317.471 Gm (2.122 AU)
364.041 Gm (2.433 AU)
Eccentricity 0.128
1386.548 d (3.80 a)
19.01 km/s
340.983°
Inclination 2.606°
323.651°
16.901°
Physical characteristics
Dimensions 71.07 ± 0.52[2] km
Mass (1.97 ± 6.78) × 1018[2] kg
Mean density
 10.48 ± 36.06[2] g/cm3
0.0202 m/s²
0.0382 km/s
31.466[3] h
Temperature ~178 K
Spectral type
 C
9.84

    112 Iphigenia /ɪfɨdʒɨˈnaɪ.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

    1. ↑ Yeomans, Donald K., "112 Iphigenia", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
    2. ↑ 2.0 2.1 2.2 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. ↑ 3.0 3.1 Pilcher, Frederick (June 2008), "Period Determination for 84 Klio, 98 Ianthe, 102 Miriam 112 Iphigenia, 131 Vala, and 650 Amalasuntha", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 35 (2): 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: 297, Bibcode:1871AN.....77..297T.
    5. ↑ Cikota, Stefan; Cikota, Aleksandar (July 2010), "Lightcurve Photometry of 112 Iphigenia", Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers 37 (3): 107, Bibcode:2010MPBu...37Q.107, doi:10.1016/j.pss.2012.03.009.