View source for (613100) 2005 TN74

{{Short description|Astronomical object}}
{{Use dmy dates|date=February 2018}}
{{DISPLAYTITLE:{{mp|613100|2005 TN|74}}}}
{{Infobox planet
| minorplanet=yes
| background=#C2E0FF
| name={{mp|(613100) 2005 TN|74}}
| discoverer=[[Scott S. Sheppard]], [[Chad Trujillo]]
| discovered=8 October 2005
| mpc_name=
| alt_names={{mp|2005 TN|74}}
| mp_category=[[Resonant trans-Neptunian object|3:5 resonant]] TNO
| orbit_ref=<ref name="jpldata">{{cite web
|title=JPL Small-Body Database Browser: 2005 TN74
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2005TN74
|accessdate=30 March 2016}}</ref>
| epoch=13 January 2016 ([[Julian day|JD]] 2457400.5)
| semimajor={{Convert|42.30237|AU|Tm|abbr=on}}
| perihelion={{Convert|32.11131|AU|Tm|abbr=on}}
| aphelion={{Convert|52.49343|AU|Tm|abbr=on|lk=on}}
| eccentricity=0.24091
| period=275.14 [[Julian year (astronomy)|yr]] (100495 [[Julian year (astronomy)|d]])
| inclination=2.17385°
| asc_node=179.25692°
| arg_peri=224.79728°
| mean_anomaly=351.03607[[Degree (angle)|°]]
| avg_speed=
| dimensions=85–240 km
| mass=
| density=
| sidereal_day=
| spectral_type=
| abs_magnitude=7.3<ref name="jpldata"/>
| albedo=
| single_temperature=
| mean_motion={{Deg2DMS|0.003582259|sup=ms}} /day
| observation_arc=1805 days (4.94 yr)
| uncertainty=4
| moid={{Convert|31.1197|AU|Tm|abbr=on}}
| jupiter_moid={{Convert|27.1241|AU|Tm|abbr=on}}
}}
'''{{mp|(613100) 2005 TN|74}}''' ([[astronomical naming conventions#Minor planets|provisional designation]] '''2005 TN74''') is a [[trans-Neptunian object]] (TNO)<ref>Most [[Scattered disc|SDOs]] have a [[Scattered disk#Perihelia|perihelion distance greater than 35AU]] and an [[orbital eccentricity|eccentricity]] of more than 0.3.</ref> in a 3:5 [[Resonant trans-Neptunian object|resonance]] with [[Neptune]].<ref name=Buie05TN74>{{Cite web |url=http://www.boulder.swri.edu/~buie/kbo/astrom/05TN74.html |title=Orbit Fit and Astrometric record for 05TN74 |access-date=7 March 2012 |archive-date=29 April 2018 |archive-url=https://web.archive.org/web/20180429165723/http://www.boulder.swri.edu/~buie/kbo/astrom/05TN74.html |url-status=dead }}</ref><ref name="resonance">{{cite web
|date=2006-10-05
|title=MPEC 2006-T35 : 2005 PR21, 2005 PT21, 2005 PU21, 2005 TN74
|publisher=[[Minor Planet Center]]
|author=Wasserman, L. H.
|author2=Buie, M. W.
|author3=Marsden, B. G.
|url=https://www.minorplanetcenter.net/mpec/K06/K06T35.html
|accessdate=2008-05-12}}</ref> It was discovered by [[Scott S. Sheppard]] and [[Chadwick A. Trujillo]] in 2005.
It was initially suspected of being a [[Neptune trojan]] since the first observations gave it a [[semi-major axis]] of 30 [[Astronomical unit|AU]] and an [[orbital eccentricity]] of 0.16,<ref name="discovery">{{cite web
|date=2005-10-31
|title=MPEC 2005-U97 : 2005 TN74, 2005 TO74
|publisher=Minor Planet Center
|author=Sheppard, S. S.
|author2=Trujillo, C. A.
|author3=Marsden, B. G.
|url=http://www.cfa.harvard.edu/mpec/K05/K05U97.html
|accessdate=2008-05-12}}</ref> but further observations showed it to have a semi-major axis of 42.7 AU, a perihelion of 32.1 AU, and an aphelion of 53.4 AU.<ref name="jpldata"/>
With an [[absolute magnitude]] of 7.2,<ref name="jpldata"/> it has an expected diameter in the range of 85 to 240&nbsp;km.<ref name="h">{{cite web
|title=Absolute Magnitude (H)
|url=http://neo.jpl.nasa.gov/glossary/h.html
|archive-url=https://web.archive.org/web/20010302182040/http://neo.jpl.nasa.gov/glossary/h.html
|url-status=dead
|archive-date=2001-03-02
|accessdate=2008-05-11}}</ref>
It has been observed 19 times over four [[Opposition (astronomy and astrology)|oppositions]].<ref name="jpldata"/>
==References==
{{reflist}}
== External links ==
* {{JPL small body|id=3301617}}
{{Trans-Neptunian objects}}
{{Minor planets navigator | |number=613100 |PageName={{mp|(613100) 2005 TN|74}} | }}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:2005 TN74}}
[[Category:Trans-Neptunian objects in a 3:5 resonance|613100]]
[[Category:Discoveries by Chad Trujillo|613100]]
[[Category:Discoveries by Scott S. Sheppard|613100]]
[[Category:Astronomical objects discovered in 2005|20051008]]