Editing 94 Aurora

{{Short description|Main-belt asteroid}}
{{Use dmy dates|date=October 2019}}
{{Infobox planet
| minorplanet = yes
| background = #D6D6D6
| name = 94 Aurora
| image = 94Aurora (Lightcurve Inversion).png
| image_scale = 
| caption = A three-dimensional model of 94 Aurora based on its light curve.
| discoverer = [[James Craig Watson]]
| discovered = 6 September 1867
| mpc_name = (94) Aurora
| alt_names = 
| pronounced = {{IPAc-en|ə|ˈ|r|ɔər|ə|,_|ɒ|-}}<ref>{{OED|aurora}}</ref>
| adjective = Aurorean {{IPAc-en|ɔː|ˈ|r|ɔər|i|ə|n}}<ref>{{OED|aurorean}}<br />But see 'aurora' for the first vowel.</ref>
| named_after = [[Aurora (mythology)|Aurōra]]
| mp_category = [[Main belt]]
| orbit_ref = <ref name=jpldata>{{cite web
  |type=2008-11-09 last obs
  |title=JPL Small-Body Database Browser: 94 Aurora
  |url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=94
  |access-date=13 May 2016}}</ref>
| epoch = 31 July 2016 ([[Julian day|JD]] 2457600.5)
| semimajor = {{Convert|3.16003|AU|Gm|abbr=on}}
| perihelion = {{Convert|2.86831|AU|Gm|abbr=on}}
| aphelion = {{Convert|3.45175|AU|Gm|abbr=on|lk=on}}
| eccentricity = 0.092315
| period = 5.62 [[Julian year (astronomy)|yr]] (2051.8 [[Julian year (astronomy)|d]])
| inclination = 7.97343°
| asc_node = 2.59859°
| arg_peri = 60.8260°
| mean_anomaly = 132.718[[Degree (angle)|°]]
| avg_speed = 16.73 km/s
| mean_diameter = {{val|204.89|3.6|ul=km}} {{small|([[IRAS]])}}<ref name=jpldata/>
| dimensions = 225 × 173 km<ref name=RASNZ/>
| mass = {{nowrap|(6.606 ± 2.584/2.173){{e|18}} kg<ref name="FiengaEtAl2020"/>}}
| density = 1.676 ± 0.655/0.551 g/cm<sup>3</sup><ref name="FiengaEtAl2020"/>{{efn|Assuming a diameter of 196 ± 4 km.}}
| surface_grav = {{Gr|0.006606|102.445|4}} m/s²
| escape_velocity = {{V2|0.006606|102.445|4}} km/s
| rotation = {{Convert|7.22|h|d|abbr=on|lk=on}}<ref name=jpldata/>
| spectral_type = [[C-type asteroid|C]]<ref name=jpldata/>
| abs_magnitude = 7.74<ref name=jpldata/>
| albedo = {{val|0.0395|0.001}}<ref name=jpldata/><br />0.0395<ref>[http://www.psi.edu/pds/resource/albedo.html Asteroid Data Sets] {{webarchive|url=https://web.archive.org/web/20091217104722/http://www.psi.edu/pds/resource/albedo.html |date=2009-12-17 }}</ref>
| single_temperature = ~157 [[kelvin|K]]
| mean_motion = {{Deg2DMS|0.175455|sup=ms}} / day
| observation_arc = 143.72 yr (52494 d)
| uncertainty = 0
}}

'''94 Aurora''' is one of the largest [[main-belt]] [[asteroid]]s. With an [[albedo]] of only 0.04, it is darker than [[soot]], and has a primitive composition consisting of carbonaceous material. It was discovered by [[James Craig Watson|J. C. Watson]] on September 6, 1867, in [[Ann Arbor, Michigan|Ann Arbor]], and named after [[Aurora (mythology)|Aurora]], the [[Roman mythology|Roman]] goddess of the [[dawn]].

This asteroid is orbiting the [[Sun]] with a [[orbital period|period]] of 5.62&nbsp;years and a relatively low [[orbital eccentricity|eccentricity]] of 0.092. It is spinning with a [[rotation period]] of 7.22&nbsp;hours. Observations of an [[occultation]] using nine [[Chord (astronomy)|chords]] indicate an [[oval]] outline of 225×173&nbsp;km.<ref name=RASNZ/> The asteroid's [[Poles of astronomical bodies|pole]] of rotation lies just 4–16° away from the [[plane of the ecliptic]].<ref name=Marciniak2011/>

==Notes==
{{notelist}}

==References==
{{Reflist|refs=

<ref name=RASNZ>{{cite web
 |title      = Occultation of TYC 6910-01938-1 by (94) Aurora - 2001 October 12
 |publisher      = [[Royal Astronomical Society of New Zealand]]
 |url      = http://occsec.wellington.net.nz/planet/2001/plnres01.htm#Aurora
 |access-date      = 2008-11-30
 |archive-date      = 19 February 2012
 |archive-url      = https://web.archive.org/web/20120219025548/http://occsec.wellington.net.nz/planet/2001/plnres01.htm#Aurora
 |url-status      = dead
 }} [http://occsec.wellington.net.nz/planet/2001/results/aurorac.gif (Chords)] {{webarchive|url=https://web.archive.org/web/20081021013134/http://occsec.wellington.net.nz/planet/2001/results/aurorac.gif |date=2008-10-21 }}</ref>

<ref name=Marciniak2011>{{citation
 | title=Photometry and models of selected main belt asteroids. VIII. Low-pole asteroids
 | display-authors=1 | last1=Marciniak | first1=A.
 | last2=Michałowski | first2=T. | last3=Polińska | first3=M.
 | last4=Bartczak | first4=P. | last5=Hirsch | first5=R.
 | last6=Sobkowiak | first6=K. | last7=Kamiński | first7=K.
 | last8=Fagas | first8=M. | last9=Behrend | first9=R.
 | last10=Bernasconi | first10=L. | last11=Bosch | first11=J. -G.
 | last12=Brunetto | first12=L. | last13=Choisay | first13=F.
 | last14=Coloma | first14=J. | last15=Conjat | first15=M.
 | last16=Farroni | first16=G. | last17=Manzini | first17=F.
 | last18=Pallares | first18=H. | last19=Roy | first19=R.
 | last20=Kwiatkowski | first20=T. | last21=Kryszczyńska | first21=A.
 | last22=Rudawska | first22=R. | last23=Starczewski | first23=S.
 | last24=Michałowski | first24=J. | last25=Ludick | first25=P.
 | journal=Astronomy & Astrophysics
 | volume=529 | id=A107 | pages=14 | date=May 2011
 | doi=10.1051/0004-6361/201015365 | bibcode=2011A&A...529A.107M | doi-access=free }}</ref>

<ref name="FiengaEtAl2020">{{Cite journal 
  |last=Fienga |first=A.
  |last2=Avdellidou |first2=C.
  |last3=Hanuš |first3=J.
  |date=February 2020
  |title=Asteroid masses obtained with INPOP planetary ephemerides
  |url=https://academic.oup.com/mnras/article/492/1/589/5658701
  |journal=Monthly Notices of the Royal Astronomical Society
  |volume=492
  |issue=1
  |doi=10.1093/mnras/stz3407
  |doi-access=free}}</ref>

}} <!--end of reflist -->

==External links==
* {{AstDys|94}}
* {{JPL small body}}

{{Minor planets navigator |93 Minerva |number=94 |95 Arethusa}}
{{Large asteroids}}
{{Small Solar System bodies}}
{{Authority control}}

{{DEFAULTSORT:000094}}
[[Category:Background asteroids]]
[[Category:Discoveries by James Craig Watson|Aurora]]
[[Category:Named minor planets|Aurora]]
[[Category:CP-type asteroids (Tholen)]]
[[Category:C-type asteroids (SMASS)]]
[[Category:Astronomical objects discovered in 1867|18670906]]
[[Category:Objects observed by stellar occultation]]
[[Category:Aurora (mythology)]]


{{C-beltasteroid-stub}}