Ensiklopedia Dunia

From Wikipedia, the free encyclopedia

2010 TJ
Discovery^[1]^[2]
Discovered by	D. L. Rabinowitz M. E. Schwamb S. Tourtellotte
Discovery site	La Silla Obs.
Discovery date	2 October 2010 (first observed only)
Designations
MPC designation	2010 TJ
Minor planet category	TNO^[1] · SDO^[3] distant^[4]
Orbital characteristics^[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 4
Observation arc	7.22 yr (2,636 days)
Aphelion	84.870 AU
Perihelion	39.894 AU
Semi-major axis	62.382 AU
Eccentricity	0.3605
Orbital period (sidereal)	492.72 yr (179,965 d)
Mean anomaly	12.366°
Mean motion	0° 0^m 7.2^s / day
Inclination	38.931°
Longitude of ascending node	91.226°
Argument of perihelion	273.70°
Physical characteristics
Mean diameter	443 km (estimated)^[3] 471 km (assumed)^[5]
Geometric albedo	0.07 (assumed)^[5] 0.09 (assumed)^[3]
Absolute magnitude (H)	5.0^[1] · 5.3^[5]

2010 TJ is a trans-Neptunian object from the scattered disc in the outermost region of the Solar System and measures approximately 460 kilometers in diameter. It was first observed by American astronomers David Rabinowitz, Megan Schwamb, and Suzanne Tourtellotte at ESO's La Silla Observatory in northern Chile on 2 October 2010.^[4]

Orbit and classification

2010 TJ is a probably a dwarf planet, based on Michael Brown's classification.^[5] Typical for scattered disc objects,^[3] it has an elliptical and inclined orbit: the object orbits the Sun at a distance of 39.9–84.9 AU once every 492 years and 9 months (179,965 days; semi-major axis of 62.4 AU). Its orbit has an eccentricity of 0.36 and an inclination of 39° with respect to the ecliptic.^[1] The body's observation arc begins with its first observation at La Silla in October 2010.^[4]

Physical characteristics

2010 TJ's color and taxonomic type have not yet been determined.^[1]^[3]

Rotation period

As of 2018, no rotational lightcurve of 2010 TJ has been obtained from photometric observations. The object's rotation period, shape and poles remain unknown.^[6]

Diameter and albedo

According to the Johnston's Archive and Michael Brown, 2010 TJ measures 443 and 471 kilometers in diameter, and its surface has an assumed albedo of 0.09 and 0.07, respectively.^[3]^[5]

Numbering and naming

This minor planet has neither been numbered nor named.^[4]

References

^ ^a ^b ^c ^d ^e ^f "JPL Small-Body Database Browser: (2010 TJ)" (2017-12-20 last obs.). Jet Propulsion Laboratory. Retrieved 17 January 2018.
^ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 17 January 2018.
^ ^a ^b ^c ^d ^e ^f Johnston, Wm. Robert (15 October 2017). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 17 January 2018.
^ ^a ^b ^c ^d "2010 TJ". Minor Planet Center. Retrieved 17 January 2018.
^ ^a ^b ^c ^d ^e Michael E. Brown. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 17 January 2018.
^ "LCDB Data for (2010 TJ)". Asteroid Lightcurve Database (LCDB). Retrieved 17 January 2018.

External links

Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
2010 TJ at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
2010 TJ at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

Dwarf planets

List of possible dwarf planets
Former dwarf planets
- Phoebe
- Triton
- Vesta
- Pallas
Mesoplanet
Planemo

Consensus

Ceres
- Geology
- Atmosphere
Orcus
- Moon
Pluto
- Geology
- Atmosphere
- Moons
Haumea
- Moons
- Ring
Makemake
- Moon
Quaoar
- Moon
- Rings
Eris
- Moon
Gonggong
- Moon
Sedna

Candidate

Asteroids	Hygiea Interamnia
Centaurs	Chariklo Chiron Pholus 1999 OX₃ 2013 TC₁₄₆ 2014 NW₆₅
Plutinos	Huya Ixion 2001 QF₂₉₈ 2002 VR₁₂₈ 2002 XV₉₃ 2003 AZ₈₄ 2003 UZ₄₁₃ 2003 VS₂ 2007 JH₄₃ 2017 OF69
Twotinos	2002 WC₁₉
Cubewanos	Chaos Salacia Varda Varuna 1998 SN₁₆₅ 2002 AW₁₉₇ 2002 CY248 2002 KX₁₄ 2002 MS₄ 2002 UX₂₅ 2003 QW₉₀ 2004 GV₉ 2004 NT₃₃ 2004 PF₁₁₅ 2004 TY₃₆₄ 2004 UX₁₀ 2005 RN₄₃ 2005 UQ₅₁₃ 2010 FX86
Other KBOs	1999 CD₁₅₈ 1999 DE₉ 2000 YW₁₃₄ 2002 XW₉₃ 2010 JO₁₇₉ 2010 VK₂₀₁ 2011 FW62 2011 GM₂₇ 2013 FZ₂₇ 2014 UM₃₃ 2015 AM₂₈₁ 2015 RR₂₄₅
Scattered disc objects	Gǃkúnǁʼhòmdímà Dziewanna 1996 GQ₂₁ 1996 TL₆₆ 2001 UR₁₆₃ 2002 TC₃₀₂ 2004 XA₁₉₂ 2005 QU₁₈₂ 2005 RM₄₃ 2006 QH181 2008 OG₁₉ 2010 KZ39 2010 RE₆₄ 2010 RF₄₃ 2010 JO179 2010 TJ 2010 VZ₉₈ 2013 FY₂₇ 2014 AN₅₅ 2014 EZ₅₁ 2014 UZ224 2014 WK₅₀₉ 2015 KH162 2015 RR245 2017 FO161 2018 AG37 2018 VG18 2021 DR15 2021 LL37
Detached objects	2003 FY₁₂₈ 2003 QX₁₁₃ 2004 XR₁₉₀ 2005 TB₁₉₀ 2007 JJ₄₃ 2008 ST₂₉₁
Sednoids	2012 VP113

Category

v t e Trans-Neptunian objects
TNO classes	Cubewanos Scattered-disc objects Detached objects Resonant objects Neptune trojans Plutinos Twotinos TNO moons
Dwarf planets (moons)	Orcus Vanth Pluto Charon Styx Nix Kerberos Hydra Haumea Namaka Hiʻiaka Ring Quaoar Weywot Rings Makemake MK2 Gonggong Xiangliu Eris Dysnomia Sedna
Sednoids	90377 Sedna 2012 VP113 541132 Leleākūhonua

Small Solar System bodies

Minor planets

Designation Groups List Moon Meanings of names
Asteroid	Active Aten asteroid Asteroid belt Family Jupiter trojan Near-Earth Spectral types
Distant minor planet	Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc

Comets

Other

Categories:

Hidden categories: