View source for 34 Circe

{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| background=#D6D6D6
| name=34 Circe
| image=34Circe (Lightcurve Inversion).png
| image_scale =
| caption=A three-dimensional model of 34 Circe based on its light curve
| discoverer=[[Jean Chacornac|J. Chacornac]]
| discovered=April 6, 1855
| mpc_name=(34) Circe
| pronounced={{IPAc-en|ˈ|s|ɜr|s|iː}}<ref>{{Cite encyclopedia |url=http://www.lexico.com/definition/Circe |archive-url=https://web.archive.org/web/20200322185709/https://www.lexico.com/definition/circe |url-status=dead |archive-date=22 March 2020 |title=Circe |dictionary=[[Lexico]] UK English Dictionary |publisher=[[Oxford University Press]]}}</ref>
| adjective=Circean {{IPAc-en|s|ər|ˈ|s|iː|ə|n}}<ref>{{OED|Circean}}</ref>
| alt_names=1965 JL
| named_after = [[Circe]]
| mp_category=[[Main belt]]
| epoch= November 4, 2013 ([[Julian day|JD]] 2456600.5)
| orbit_ref = <ref name="JPL"/>
| semimajor= 2.686984 AU
| perihelion= 2.406230 AU
| aphelion= 2.967739 [[Astronomical unit|AU]]
| eccentricity= 0.1045
| period=4.40 [[Julian year (astronomy)|a]] (1607.332 d)
| inclination= 5.498°
| asc_node=184.44157°
| arg_peri=330.2330°
| mean_anomaly=39.80474°
| avg_speed=18.12 km/s
| dimensions=113.02 ± 4.90 km<ref name="Carry2012"/>
| mass={{nowrap|(3.66 ± 0.03) × 10<sup>18</sup> kg<ref name="Carry2012"/>}}
| density=4.83 ± 0.63 g/cm<sup>3</sup><ref name="Carry2012"/>
| surface_grav=~0.0317 m/s²
| escape_velocity=~0.0600 km/s
| rotation=0.5063 d (12.15 h) <ref name="JPL"/>
| spectral_type=[[C-type asteroid|C]]
| abs_magnitude=8.51
| albedo=0.0541 <ref name="JPL"/>
| single_temperature=~172 [[kelvin|K]]
}}
'''34 Circe''' is a large, very dark [[main-belt]] [[asteroid]]. It was discovered by French astronomer [[Jean Chacornac|J. Chacornac]] on April 6, 1855, and named after [[Circe]], the bewitching queen of [[Aeaea]] island in [[Greek mythology]].
The spectrum of this object matches a [[C-type asteroid]], suggesting a [[carbonaceous]] composition. It has a cross-section size of 113&nbsp;km and is orbiting the [[Sun]] with a period of 4.40&nbsp;years. [[Photometry (astronomy)|Photometric]] observations of this asteroid made during 2007 at the Organ Mesa Observatory in [[Las Cruces, New Mexico]] gave an asymmetrical bimodal [[light curve]] with a period of 12.176 ± 0.002 hours and a brightness variation of 0.17 ± 0.02 in [[Magnitude (astronomy)|magnitude]].<ref name="Pilcher2008"/> The spectra of the asteroid displays evidence of aqueous alteration.<ref name=Fornasier1999/>
==References==
{{Reflist|refs=
<ref name="JPL">{{Citation
| first1    = Donald K.
| last1     = Yeomans
| title     = 34 Circe
| work      = JPL Small-Body Database Browser
| publisher = [[NASA Jet Propulsion Laboratory]]
| url       = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=34
| access-date= 2013-12-21
| postscript= .}}</ref>
<ref name=Fornasier1999>{{citation
| title=Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites
| display-authors=1 | postscript=.
| last1=Fornasier | first1=S. | last2=Lazzarin | first2=M.
| last3=Barbieri | first3=C. | last4=Barucci | first4=M. A.
| journal=Astronomy and Astrophysics Supplement
| volume=135 | pages=65−73 | date=February 1999
| doi=10.1051/aas:1999161 | bibcode=1999A&AS..135...65F | doi-access=free | url=https://ui.adsabs.harvard.edu/link_gateway/1999A&AS..135...65F/PUB_PDF }}</ref>
<ref name="Carry2012">{{Citation
| first1    = B.
| last1     = Carry
| title     = Density of asteroids
| journal      = Planetary and Space Science
| volume    = 73
| issue = 1
| pages     = 98–118
| date      = December 2012
| doi       = 10.1016/j.pss.2012.03.009
| bibcode   = 2012P&SS...73...98C
| postscript= .
| arxiv     = 1203.4336 | s2cid = 119226456
}} See Table 1.</ref>
<ref name="Pilcher2008">{{Citation
| last1     = Pilcher
| first1    = Frederick
| title     = Period Determinations for 26 Proserpina, 34 Circe 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta
| journal      = The Minor Planet Bulletin
| volume    = 35
| issue     = 3
| pages     = 135–138
| date      = September 2008
| bibcode   = 2008MPBu...35..135P
| postscript= .}}</ref>
}} <!-- end of reflist -->
==External links==
* {{AstDys|34}}
* {{JPL small body}}
{{Minor planets navigator |33 Polyhymnia |number=34 |35 Leukothea}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:000034}}
[[Category:C-type asteroids (Tholen)]]
[[Category:Circe]]
[[Category:Ch-type asteroids (SMASS)]]
[[Category:Background asteroids]]
[[Category:Discoveries by Jean Chacornac|Circe]]
[[Category:Named minor planets|Circe]]
[[Category:Astronomical objects discovered in 1855|18550406]]