Editing 94 Aurora (section)

{{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/>