| 词条 | 112 Iphigenia |
| 释义 |
| minorplanet=yes | background=#D6D6D6 | name=112 Iphigenia | discoverer=Christian Heinrich Friedrich Peters | discovered=19 September 1870 | mpc_name=(112) Iphigenia | alt_names= | named_after=Iphigenia | mp_category=Main belt | epoch=31 July 2016 (JD 2457600.5) | orbit_ref= | semimajor={{Convert|2.43415|AU|Gm|abbr=on}} | perihelion={{Convert|2.12225|AU|Gm|abbr=on}} | aphelion={{Convert|2.7461|AU|Gm|abbr=on|lk=on}} | eccentricity=0.12813 | period=3.80 yr (1387.1 d) | inclination=2.6029° | asc_node=323.538° | arg_peri=16.676° | mean_anomaly=169.984° | avg_speed=19.01 km/s | dimensions={{val|72.18|4.4|ul=km}} 71.07 ± 0.52 km[3] | mass={{nowrap|(1.97 ± 6.78) × 1018 kg[3]}} | density=10.48 ± 36.06 g/cm3[3] | surface_grav=0.0202 m/s² | escape_velocity=0.0382 km/s | rotation={{Convert|31.466|h|d|abbr=on|lk=on}}[7] | spectral_type=C | abs_magnitude=9.84 | albedo={{val|0.0393|0.005}} | single_temperature=~178 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 }}Iphigenia ({{IPAc-en|,|ɪ|f|ᵻ|dʒ|ᵻ|ˈ|n|aɪ|.|ə}}; minor planet designation: 112 Iphigenia) 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.[8]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.[9] These findings agree with independent results reported in 2008, which gave a period of 31.466 ± 0.001 hours.[7] References1. ^1 2 3 {{Citation | first1 = B. | last1 = Carry | title = Density of asteroids | work = Planetary and Space Science | volume = 73 | pages = 98–118 |date=December 2012 | doi = 10.1016/j.pss.2012.03.009 | bibcode = 2012P&SS...73...98C | postscript= .|arxiv = 1203.4336 }} See Table 1. [1][2][3][4]2. ^1 {{Citation | first1 = Stefan | last1 = Cikota | first2 = Aleksandar | last2 = Cikota | title = Lightcurve Photometry of 112 Iphigenia | work = The Minor Planet Bulletin | volume = 37 | issue = 3 | page = 107 |date=July 2010 | doi = 10.1016/j.pss.2012.03.009 | bibcode = 2010MPBu...37Q.107C| postscript= .| arxiv= 1203.4336 }} 3. ^1 2 {{Citation | first1 = Frederick | last1 = Pilcher | title = Period Determination for 84 Klio, 98 Ianthe, 102 Miriam 112 Iphigenia, 131 Vala, and 650 Amalasuntha | work = The Minor Planet Bulletin | volume = 35 | issue = 2 | pages = 71–72 |date=June 2008 | doi = 10.1016/j.pss.2012.03.009 | bibcode = 2008MPBu...35...71P | postscript= .| arxiv= 1203.4336 }} 4. ^1 {{Citation | first1 = F. | last1 = Tietjen | title = Elemente der (112) Iphigenia. Aus einem Schreiben des Herrn Dr. F. Tietjen an den Herausgeber | work = Astronomische Nachrichten | volume = 77 | page = 297 |date=May 1871 | bibcode = 1871AN.....77..297T | postscript= . | doi = 10.1002/asna.18710771903}} }} External links
7 : Background asteroids|Discoveries by Christian Peters|Minor planets named from Greek mythology|Named minor planets|DCX-type asteroids (Tholen)|Ch-type asteroids (SMASS)|Astronomical objects discovered in 1870 |
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