1999 TR11
{{Use dmy dates|date=October 2018}}
{{DISPLAYTITLE:{{mp|1999 TR|11}}}}
{{Infobox planet
| minorplanet = yes
| name = {{mp|1999 TR|11}}
| background = #C2E0FF
| image =
| image_size =
| caption =
| discoverer = S. S. Sheppard
| discovery_site = Mauna Kea Obs.
| discovered = 9 October 1999
{{small|(first observed only)}}
| mpc_name = {{mp|1999 TR|11}}
| alt_names =
| pronounced =
| named_after =
| mp_category = TNO{{·}}plutino
distant
| epoch = 27 April 2019 (JD 2458600.5)
| uncertainty = 6
| observation_arc = 1.23 yr (448 d)
| aphelion = 48.670 AU
| perihelion = 29.697 AU
| semimajor = 39.184 AU
| eccentricity = 0.2421
| period = 245.28 yr (89,589 d)
| mean_anomaly = 36.718°
| mean_motion = {{Deg2DMS|0.0040|sup=ms}} / day
| inclination = 17.163°
| asc_node = 54.786°
| arg_peri = 346.17°
| mean_diameter = {{val|93|ul=km}} {{small|(est.)}}
| rotation =
| albedo = 0.09 {{small|(assumed)}}
| spectral_type = RR {{small|(very red)}}
B–V {{=}} {{val|1.020}}
V–R {{=}} {{val|0.750}}
}}
{{mp|1999 TR|11}}, is a resonant trans-Neptunian object from the Kuiper belt, located in the outermost region of the Solar System. The reddish plutino measures approximately {{convert|93|km|mi|abbr=off|sigfig=2|sp=us}} in diameter. It was first observed on 9 October 1999, by American astronomer Scott Sheppard at the Mauna Kea Observatories with the University of Hawaii{{'s}} 2.2-meter telescope.
Orbit and classification
{{mp|1999 TR|11}} orbits the Sun at a distance of 29.7–48.7 AU once every 245 years and 3 months (89,589 days; semi-major axis of 39.18 AU). Its orbit has an eccentricity of 0.24 and an inclination of 17° with respect to the ecliptic. The body's observation arc begins with a precovery taken at Mauna Kea on 7 October 1999, just two nights prior to its official first observation.
It is a member of the plutinos, a group of resonant trans-Neptunian objects named after Pluto. Located in the inner region of Kuiper belt, the plutinos are making 2 orbits for every 3 Neptune makes.
Numbering and naming
As of 2018, this minor planet has neither been numbered nor named by the Minor Planet Center. The official discoverer(s) will be defined when the object is numbered.
Physical characteristics
{{mp|1999 TR|11}} has a very reddish color (RR), indicative of a non-carbonaceous composition rich in tholins and methane. According to the Johnston's archive, the object only measures 93 kilometers in diameter based on an absolute magnitude of 8.4, and an assumed albedo of 0.09 for the body's surface. Since it is far too small for being considered a dwarf planet candidate, it is not listed at Michael Brown{{'s}} website. As of 2018, no rotational lightcurve of {{mp|1999 TR|11}} has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.
References
{{reflist|30em|refs=
|type = 2000-12-28 last obs.
|title = JPL Small-Body Database Browser: (1999 TR11)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3031204
|publisher = Jet Propulsion Laboratory
|accessdate = 23 October 2018}}
|title = 1999 TR11
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=1999+TR11
|accessdate = 23 October 2018}}
|first1 = S. |last1 = Sheppard
|first2 = B. G. |last2 = Marsden
|date = October 1999
|title = 1999 TR11
|url = https://minorplanetcenter.net//mpec/J99/J99T51.html
|journal = Minor Planet Electronic Circ.
|volume = 1999-T51
|issue = 1999-T51 (1999). (MPEC Homepage)
|bibcode = 1999MPEC....T...51S
|access-date= 23 October 2018}}
|title = List Of Transneptunian Objects
|work = Minor Planet Center
|url = https://minorplanetcenter.net/iau/lists/TNOs.html
|accessdate = 23 October 2018}}
|title = List of Known Trans-Neptunian Objects
|publisher = Johnston's Archive
|date = 7 October 2018
|url = http://www.johnstonsarchive.net/astro/tnoslist.html
|accessdate = 23 October 2018}}
|title = How many dwarf planets are there in the outer solar system?
|publisher = California Institute of Technology
|last = Brown |first= Michael E.
|url = http://web.gps.caltech.edu/~mbrown/dps.html
|accessdate = 23 October 2018}}
|title = Asteroid 1999 TR11
|work = Small Bodies Data Ferret
|url = https://sbntools.psi.edu/ferret/SimpleSearch/results.action?targetName=1999+TR11
|accessdate = 23 October 2018}}
|title = LCDB Data for (1999+TR11)
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=0%7C1999+TR11
|accessdate = 23 October 2018}}
}}
External links
- [http://adsabs.harvard.edu/abs/1999MPEC....T...51S 1999 TR11], Sheppard, S., Marsden, B. G. 1999, Minor Planet Electronic Circular, 1999-T51
- [https://minorplanetcenter.net/iau/lists/TNOs.html List of Transneptunian Objects], Minor Planet Center
- {{AstDys|1999TR11}}
- {{JPL small body|id=3031204}}
{{Trans-Neptunian objects}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:1999 TR11}}