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{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet=yes
| background=#D6D6D6
| name=112 Iphigenia
| discoverer=[[Christian Heinrich Friedrich Peters]]
| discovered=
| mpc_name=(112) Iphigenia
| alt_names=A870 SA
| named_after = [[Iphigenia]]▼
|image= 000112-asteroid shape model (112) Iphigenia.png
|caption= 3D convex shape model of 112 Iphigenia| pronounced={{IPAc-en|ˌ|ɪ|f|ᵻ|dʒ|ᵻ|ˈ|n|aɪ|ə}}<ref>Noah Webster (1884) ''A Practical Dictionary of the English Language''</ref>
| mp_category=[[Main belt]]
| epoch=
| orbit_ref
| semimajor=
| perihelion=
| aphelion={{
| eccentricity=0.
| period=
| inclination=2.
| asc_node=323.
| arg_peri=16.
| mean_anomaly=
| avg_speed=19.01 km/s
| dimensions={{val|72.18|4.4|ul=km}}<ref name="JPL"/><br />71.07 ± 0.52 km<ref name="Carry2012"/>
| mass={{nowrap|(1.97 ± 6.78) × 10<sup>18</sup> kg<ref name="Carry2012"/>
| density=10.48 ± 36.06
| surface_grav=0.0202 m/s²
| escape_velocity=0.0382 km/s
| rotation={{Convert|31.466|h|d|abbr=on|lk=on}}<ref name="
| spectral_type=[[C-type asteroid|C]]
| abs_magnitude=9.84
| albedo={{val|0.0393|0.005}}
| single_temperature=~178 [[kelvin|K]]
| mean_motion={{Deg2DMS|0.25953|sup=ms}} / day
| observation_arc=145.57 yr (53169 d)
| uncertainty=0
| moid={{Convert|1.11284|AU|Gm|abbr=on}}
| jupiter_moid={{Convert|2.60275|AU|Gm|abbr=on}}
| tisserand=3.493
}}
'''112 Iphigenia''' {{IPAc-en|ɪ|f|ɨ|dʒ|ɨ|ˈ|n|aɪ|.|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 [[carbonate|carbonaceous]] composition. It was discovered by German-American astronomer [[Christian Heinrich Friedrich Peters|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 [[Germany|German]] astronomer [[Friedrich Tietjen]] in 1871.<ref name="Tietjen1871"/>▼
▲'''112 Iphigenia'''
[[Photometry (astronomy)|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 (astronomy)|magnitude]] during each cycle.<ref name="Cikota2010"/> These findings agree with independent results reported in 2008, which gave a period of 31.466 ± 0.001 hours.<ref name="Pilcher2008"/>▼
▲This body is orbiting the [[Sun]] with a [[orbital period|period]] of 3.80 years and an [[orbital eccentricity|eccentricity]] of 0.13. The [[orbital plane]] is [[orbital inclination|inclined]] by 2.6° to the [[plane of the ecliptic]]. 112 Iphigenia has a cross-section diameter of ~72 km. [[Photometry (astronomy)|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 period|synodic]] [[rotation period]] of {{val|31.385
==References==▼
▲== References ==
{{Reflist|refs=
<ref name="JPL">{{Citation
| first1 = Donald K.
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| work = JPL Small-Body Database Browser
| publisher = [[NASA Jet Propulsion Laboratory]]
| url =
| accessdate=
| postscript= .}}</ref>
}}</ref>▼
<ref name="Carry2012">{{Citation
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| last1 = Carry
| title = Density of asteroids
|
| volume = 73
| issue = 1
| pages = 98–118
|date=December 2012
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| bibcode = 2012P&SS...73...98C
| postscript= .
|arxiv = 1203.4336 | s2cid = 119226456
}} See Table 1.</ref> <ref name="Cikota2010">{{Citation
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| last2 = Cikota
| title = Lightcurve Photometry of 112 Iphigenia
| journal = The Minor Planet Bulletin
| volume = 37
| issue = 3
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|date=July 2010
| doi = 10.1016/j.pss.2012.03.009
| bibcode = 2010MPBu...37Q.
| arxiv= 1203.4336 | s2cid = 119226456
}}</ref>▼
▲ }}</ref>
<ref name="Pilcher2008">{{Citation
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| last1 = Pilcher
| title = Period Determination for 84 Klio, 98 Ianthe, 102 Miriam 112 Iphigenia, 131 Vala, and 650 Amalasuntha
| journal = The Minor Planet Bulletin
| volume = 35
| issue = 2
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| bibcode = 2008MPBu...35...71P
| postscript= .
| arxiv= 1203.4336 | s2cid = 119226456
▲ }}</ref>
<ref name="Tietjen1871">{{Citation
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| last1 = Tietjen
| title = Elemente der (112) Iphigenia. Aus einem Schreiben des Herrn Dr. F. Tietjen an den Herausgeber
|
| volume = 77
| page = 297
| date = May 1871
| bibcode = 1871AN.....77..297T
| postscript= .
| doi = 10.1002/asna.18710771903
| url = https://zenodo.org/record/1424681}}</ref>
}} <!-- end of reflist -->
{{Minor planets navigator|111 Ate|113 Amalthea}}▼
== External links ==
{{DEFAULTSORT:000112}}▼
* {{AstDys|112}}
[[Category:Main-belt asteroids]]▼
* {{JPL small body}}
[[Category:Ch-type asteroids (SMASS)]]▼
[[Category:Dcx-type asteroids (Tholen)]]▼
[[Category:Astronomical objects discovered in 1870|18700919]]▼
[[Category:Discoveries by Christian Peters]]▼
[[Category:Numbered asteroids]]▼
▲{{Minor planets navigator |111 Ate |number=112 |113 Amalthea}}
{{Small Solar System bodies}}
{{Authority control}}
▲[[Category:Ch-type asteroids (SMASS)|000112]]
▲[[Category:Discoveries by Christian Peters]]
[[Category:Named minor planets]]
▲[[Category:Astronomical objects discovered in 1870|18700919]]
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