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Iphigenia (minor planet designation: 112 Iphigenia) is a fairly large and exceedingly dark main-belt asteroid. It is classified as a C-type asteroid, and therefore probably has a primitive carbonaceous composition. It was discovered by German-American astronomer C. H. F. Peters on September 19, 1870, and named after Iphigenia, a princess sacrificed by her father in Greek mythology. The orbital elements for 112 Iphigenia were published by German astronomer Friedrich Tietjen in 1871.[5]

112 Iphigenia
3D convex shape model of 112 Iphigenia
Discovery
Discovered byChristian Heinrich Friedrich Peters
Discovery date19 September 1870
Designations
MPC designation
(112) Iphigenia
Pronunciation/ˌɪfɪdʒɪˈnaɪə/[1]
Named after
Iphigenia
Alternative designations
A870 SA
Minor planet category
Main belt
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc145.57 yr (53169 d)
Aphelion2.7461 AU (410.81 Gm)
Perihelion2.12225 AU (317.484 Gm)
Semi-major axis
2.43415 AU (364.144 Gm)
Eccentricity0.12813
Orbital period (sidereal)
3.80 yr (1387.1 d)
Average orbital speed
19.01 km/s
Mean anomaly
169.984°
Mean motion
0° 15m 34.308s / day
Inclination2.6029°
Longitude of ascending node
323.538°
Argument of perihelion
16.676°
Earth MOID1.11284 AU (166.478 Gm)
Jupiter MOID2.60275 AU (389.366 Gm)
TJupiter3.493
Physical characteristics
Dimensions72.18±4.4 km[2]
71.07 ± 0.52 km[3]
Mass(1.97 ± 6.78) × 1018 kg[3]
Mean density
10.48 ± 36.06 g/cm3[3]
Equatorial surface gravity
0.0202 m/s²
Equatorial escape velocity
0.0382 km/s
Synodic rotation period
31.466 h (1.3111 d)[2][4]
Geometric albedo
0.0393±0.005
Temperature~178 K
Spectral type
C
Absolute magnitude (H)
9.84

    This body is orbiting the Sun with a period of 3.80 years and an eccentricity of 0.13. The orbital plane is inclined by 2.6° to the plane of the ecliptic. 112 Iphigenia has a cross-section diameter of ~72 km. 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.[6] These findings agree with independent results reported in 2008, which gave a period of 31.466±0.001 hours.[4]


    References


    1. Noah Webster (1884) A Practical Dictionary of the English Language
    2. Yeomans, Donald K., "112 Iphigenia", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 12 May 2016.
    3. Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
    4. 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): 71–72, arXiv:1203.4336, Bibcode:2008MPBu...35...71P, doi:10.1016/j.pss.2012.03.009.
    5. Tietjen, F. (May 1871), "Elemente der (112) Iphigenia. Aus einem Schreiben des Herrn Dr. F. Tietjen an den Herausgeber" (PDF), Astronomische Nachrichten, 77: 297, Bibcode:1871AN.....77..297T, doi:10.1002/asna.18710771903.
    6. Cikota, Stefan; Cikota, Aleksandar (July 2010), "Lightcurve Photometry of 112 Iphigenia", The Minor Planet Bulletin, 37 (3): 107, arXiv:1203.4336, Bibcode:2010MPBu...37Q.107C, doi:10.1016/j.pss.2012.03.009.



    На других языках

    [de] (112) Iphigenia

    (112) Iphigenia wurde am 19. September 1870 von Christian Heinrich Friedrich Peters entdeckt und nach Iphigenie, einer Tochter des Agamemnon, benannt.
    - [en] 112 Iphigenia

    [es] (112) Iphigenia

    (112) Iphigenia es un asteroide que forma parte del cinturón de asteroides y fue descubierto por Christian Heinrich Friedrich Peters desde el observatorio Litchfield de Clinton, Estados Unidos, el 19 de septiembre de 1870. Está nombrado por Ifigenia, un personaje de la mitología griega.[2]

    [fr] (112) Iphigénie

    (112) Iphigénie[2] (désignation internationale (112) Iphigenia) est un astéroïde de la ceinture principale découvert par Christian Peters le 19 septembre 1870.

    [it] 112 Iphigenia

    112 Iphigenia (in italiano 112 Ifigenia) è un piccolo asteroide della Fascia principale estremamente scuro. Ha probabilmente una composizione carboniosa primitiva.

    [ru] (112) Ифигения

    (112) Ифиге́ния (лат. Iphigenia) — астероид главного пояса, принадлежащий к тёмному спектральному классу C. Он был открыт 19 сентября 1870 года германо-американским астрономом К. Г. Ф. Петерсом в обсерватории Литчфилд и назван в честь Ифигении, персонажа древнегреческих мифов[1].


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