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{{DISPLAYTITLE:{{mp|(101429) 1998 VF<sub>|31</sub>}}}}
{{Infobox planet
|widthminorplanet = 25emyes
|name = {{mp|(101429) 1998 VF|31}}
|background = #FFFFC0FA8072▼
|symbol =
|image =
▲|background = #FFFFC0
|imagecaption =
|caption =
|discovery_ref = <ref name=JPL />
|discoverer = [[LINEAR]]
|discovered =November 13, November 1998
|discovery_site = [[Socorro, New Mexico]]
|mpc_name = {{mp|(101429) 1998 VF|31}}
|mp_name =
|mp_category = {{mpcat|Martian L5|125}}, [[List of Mars-crossing minor planets|Mars-crossing asteroid]]
|alt_names = {{mp|1998 VF|31}}
|orbit_ref = <ref name=JPL />
|orbit_ref =<ref name=JPL>{{Cite web|title=JPL Small-Body Database Browser|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=101429|accessdate=December 3, 2009}}</ref>▼
|epoch = 2455200.5<br13 January 2016 />(2010-Jan-04[[Julian day|JD]] 2457400.05)
|observation_arc = 7056 days (19.32 yr)
|aphelion = 1.6772711 [[Astronomical unit|AU]]
|uncertainty = 0
|perihelion = 1.3710141 [[Astronomical unit|AU]]
|aphelion = {{Convert|1.6771808|AU|Gm|abbr=on|lk=on}}
|semimajor = 1.5241426 [[Astronomical unit|AU]]
|perihelion = {{Convert|1.3711043|AU|Gm|abbr=on}}
|eccentricity = 0.1004686▼
|semimajor = {{Convert|1.5241426|AU|Gm|abbr=on}}
|period = 687.2849216[[Day|d]]<br>1.88 [[Year|yr]]<br>1.00058445 Martian years
▲|eccentricity = 0.10046861004094
|avg_speed =
|period = 1.88 [[Julian year (astronomy)|yr]] (687.28 [[Julian year (astronomy)|d]])
|inclination = 31.29561[[Degree (angle)|295943°]]
|asc_node = 229.08991[[Degree (angle)|°]]
|asc_node = 221.31782°
|mean_anomaly = 124.35751[[Degree (angle)|°]]
|arg_perimean_anomaly = 310301.5333739501[[Degree (angle)|°]]
|mean_motion = {{Deg2DMS|0.52380023|sup=ms}} / day
|satellites =
|arg_peri = 310.56601°
|dimensions =
|mean_diameter =
|mass =
|mean_temp_1rotation = ~25017.2 [[KelvinHour|Kh]]<ref name=neighborsJPL />▼
|density =
|albedo = ▼
|surface_grav =
|spectral_type = [[S-type asteroid|S]]<ref name=neighbors />▼
|escape_velocity =
|abs_magnitude = 17.42<ref name=JPL />▼
|sidereal_day =
|axial_tilt =
|pole_ecliptic_lat =
|pole_ecliptic_lon =
▲|albedo =
|temp_name1 =
▲|mean_temp_1 = ~250 [[Kelvin|K]]<ref name=neighbors />
|max_temp_1 =
|temp_name2 =
|max_temp_2 =
▲|spectral_type = [[S-type asteroid]]<ref name=neighbors />
▲|abs_magnitude = 17.4
}}
 
'''{{mp|(101429) 1998 VF|31}}''' ([[Minor planet provisional designation|provisional designation]] '''{{mp|1998 VF|31}}''') is a smallsub-kilometer [[asteroid]] that orbits near [[Mars]]'s {{L5}} [[Lagrangian point]], on average trailing [[Degree (angle)|60°]] behind it. Its orbit is highly stable, and was originally thought to be spectroscopically similar to [[5261 &nbsp;Eureka]], suggesting they may both be primordial Martian asteroids.<ref name=spectroscopy>{{Cite journal|title=Spectroscopy and photometry of Mars Trojans|last1=Rivkin|first1=Andrew. S.|last2=Binzel|first2= R. P.|last3= Howell|first3= E. S.|last4= Bus|first4= S. J.|last5=Grier|first5= J. A.|date=October 2003|journal=[[Icarus (journal)|Icarus]]|volume=165|issue=2|pages=349–354|doi=10.1016/S0019-1035(03)00211-2|bibcode=2003Icar..165..349R}}</ref>
 
Spectroscopic observations through 2007 indicate that it has a large proportion of metal and [[achondrite]]s on its surface (either with or without a [[mesosiderite]] contribution); which could also indicate that the surface [[regolith]] has undergone [[space weathering]]. These observations also reveal differences in the spectra with 5261 Eureka, suggesting they may not be related to each other after all.<ref name=neighbors>{{Cite journal|title=Composition of the L5 Mars Trojans: Neighbors, not Siblings|last1=Rivkin|first1=Andrew S.| last2=Trilling|first2= David E.|last3= Thomas|first3= Cristina A.|last4= DeMeo|first4= Francesca|last5= Spahr|first5= Timothy B.|last6= Binzel|first6= Richard P.| date=December 2007|journal=[[Icarus (journal)|Icarus]]|volume=192|issue=2|pages=434–441|doi=10.1016/j.icarus.2007.06.026|arxiv=0709.1925|bibcode=2007Icar..192..434R}}</ref>
 
== See also ==
* [[5261 Eureka]] (1990 MB)
* {{mpl|(121514) 1999 UJ|7}}
* {{mpl|(385250) 2001 DH|47}}▼
* {{mpl|(311999) 2007 NS|2}}
▲* {{mpl|(385250) 2001 DH|47}}
* {{mpl|2009 SE|}}
* {{mpl|2011 SC|191}}
* {{mpl|2011 SL|25}}
* {{mpl|2011 SP|189}}
* {{mpl|2011 UB|256}}
* {{mpl|2011 UN|63}}
* {{mpl|2016 CP|31}}
* {{mpl|2018 EC|4}}
* {{mpl|2018 FC|4}}
* {{mpl|2020 VT|1}}
 
== References ==
{{Reflist}}|refs=
 
▲|orbit_ref =<ref name=JPL>{{Cite web|title=JPL Small-Body Database Browser|url=httphttps://ssd.jpl.nasa.gov/sbdb.cgi?sstr=101429|accessdate=December7 3,April 20092016}}</ref>
 
<ref name=neighbors>{{Cite journal|title=Composition of the L5 Mars Trojans: Neighbors, not Siblings|last1=Rivkin|first1=Andrew S.| last2=Trilling|first2= David E.|last3= Thomas|first3= Cristina A.|last4= DeMeo|first4= Francesca|last5= Spahr|first5= Timothy B.|last6= Binzel|first6= Richard P.| date=December 2007|journal=[[Icarus (journal)|Icarus]]|volume=192|issue=2|pages=434–441|doi=10.1016/j.icarus.2007.06.026|arxiv=0709.1925|bibcode=2007Icar..192..434R|s2cid=15118710 }}</ref>
 
<ref name=spectroscopy>{{Cite journal|title=Spectroscopy and photometry of Mars Trojans|last1=Rivkin|first1=Andrew. S.|last2=Binzel|first2= R. P.|last3= Howell|first3= E. S.|author3-link=Ellen Howell|last4= Bus|first4= S. J.|last5=Grier|first5= J. A.|author5-link=JA Grier|date=October 2003|journal=Icarus|volume=165|issue=2|pages=349–354|doi=10.1016/S0019-1035(03)00211-2|bibcode=2003Icar..165..349R}}</ref>
 
}} <!-- end of reflist -->
 
== External links ==
* {{JPL small body|id=101429}}
* [http://www.jpl.nasa.gov/ NASA JPL] Small-Body Database Browser on [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=101429 (101429) 1998 VF31]
 
{{Minor planets navigator | |number=101429 |PageName={{mp|(101429) 1998 VF|31}} | }}
{{Small Solar System bodies}}
{{Mars}}
{{portalPortal bar|MarsSolar System}}
{{Authority control}}
 
{{DEFAULTSORT:1998 VF31}}
[[Category:Mars-crossing asteroids|101429]]▼
[[Category:Numbered asteroids|101429]]
[[Category:S-type asteroids|101429]]
[[Category:Mars trojans|101429]]
[[Category:Astronomical objects discovered in 1998|19981113]]▼
[[Category:Discoveries by LINEAR|101429]]
▲[[Category:MarsS-crossingtype asteroids|101429]]
 
▲[[Category:Astronomical objects discovered in 1998|19981113]]
 
{{Mars-crosser-asteroid-stub}}
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