(119979) 2002 WC19

(119979) 2002 WC₁₉
Discovery
Discovered by	Palomar Observatory
Discovery date	16 November 2002
Designations
MPC designation	(119979) 2002 WC₁₉
Minor planet category	Twotino^[1]^[2]
Orbital characteristics ^[3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	3978 days (10.89 yr)
Aphelion	60.732 AU (9.0854 Tm)
Perihelion	35.289 AU (5.2792 Tm)
Semi-major axis	48.010 AU (7.1822 Tm)
Eccentricity	0.26498
Orbital period	332.67 yr (121507 d)
Mean anomaly	316.02°
Mean motion	0° 0^m 10.666^s / day
Inclination	9.1746°
Longitude of ascending node	109.7547°
Argument of perihelion	44.356°
Known satellites	1 (≈ 127 km)^[4]
Earth MOID	34.3056 AU (5.13204 Tm)
Jupiter MOID	29.9229 AU (4.47640 Tm)
Physical characteristics
Dimensions	≈ 440 km (assumed)^[4]
Geometric albedo	0.07 (expected from theory)^[5]
Absolute magnitude (H)	4.9

(119979) 2002 WC₁₉, also written as (119979) 2002 WC19, is a twotino, i.e. it is in a 1:2 orbital resonance with Neptune. It was discovered on November 16, 2002 at the Palomar Observatory. It is probably a dwarf planet.^[5]

Knowing how many twotinos there are may reveal whether Neptune took roughly 1 million or 10 million years to migrate about 7 AU from its birth location.^[6]

Orbit of 2002 WC₁₉ compared to Pluto and Neptune

1:2 libration over 20,000 years – Neptune is held stationary (dot at 5 o'clock); orbit of Uranus in blue

Satellite

A natural satellite was reported to be orbiting (119979) 2002 WC₁₉ on February 27, 2007. It is estimated to be 2,760 ± 250 km from the primary and to be around 139 kilometres (86 mi) in diameter.^[4]

References

↑ Marc W. Buie (2004-12-14). "Orbit Fit and Astrometric record for 119979". (using 61 of 65 observations) SwRI (Space Science Department). Retrieved 2009-03-04.
↑ "MPEC 2009-C70 :Distant Minor Planets (2009 February 28.0 TT)". Minor Planet Center. 2009-02-10. Retrieved 2009-03-04.
↑ "JPL Small-Body Database Browser: 119979 (2002 WC19)" (2012-11-06 last obs; arc: 10.89 years). Retrieved 7 April 2016.
1 2 3 Wm. Robert Johnston (20 September 2014). "(119979) 2002 WC19". Johnston's Archive. Retrieved 2014-11-15.
1 2 Mike Brown, How many dwarf planets are there in the outer solar system? Archived October 18, 2011, at the Wayback Machine.
↑ Ron Cowen (2009-01-04). "On the Fringe". ScienceNews. Archived from the original on 7 January 2010. Retrieved 2010-01-04.

External links

Orbital simulation from JPL (Java)
Ephemeris
(119979) 2002 WC19 at the JPL Small-Body Database
- Discovery · Orbit diagram · Orbital elements · Physical parameters

Minor planets navigator

(119978) 2002 WK4 (119979) 2002 WC₁₉ (119980) 2002 XW3

Small Solar System bodies

Minor planets

Designation Groups Moons Meanings of names Pronunciation of names

Asteroids	Aten asteroid Asteroid belt Families Jupiter Trojans Near-Earth Spectral types

Distant minor planets	Centaurs Damocloids Neptune trojans Trans-Neptunian objects Detached Kuiper belt Oort cloud Scattered disc

Comets

Meteoroids

Lists / categories

Asteroid groups and families
Asteroid moons
Binary asteroids
Minor planets

Trans-Neptunian objects

TNO classes	Cubewanos Scattered-disc objects Detached objects Resonant objects (Neptune trojans Plutinos Twotinos) Natural satellites Double objects

Dwarf Planets (moons)	Pluto Charon Styx Nix Kerberos Hydra Haumea Namaka Hi'iaka Makemake S/2015 (136472) 1 Eris Dysnomia

Sednoids	90377 Sedna 2012 VP113

Dwarf planets

Asteroid belt	IAU: Ceres No longer rounded and therefore not dwarf planets: Vesta (disrupted out of equilibrium)

Centaurs	Possibly: Chariklo Chiron

Centaurs (extended)	Possibly: 1995 SN55 Ceto 2010 TY53

Plutinos	IAU: Pluto Additional objects proposed by Brown and Tancredi: Orcus Ixion 2003 AZ₈₄ 2004 UX₁₀ Huya Possibly: 2003 UZ₄₁₃ 2003 VS₂ 2002 VR₁₂₈ 2004 PF₁₁₅ 2002 XV93 2007 JH43 2001 QF298

Twotinos	Possibly: 2002 WC₁₉

Other resonances/ unknown resonances:	IAU: Haumea Possibly: 2002 XW₉₃ 1999 DE₉ 1999 KR₁₆ 2001 YH₁₄₀ 2011 GM27 2010 VK201 2013 FZ27 2014 UM33 1999 CD158

Cubewanos:	IAU: Makemake Additional objects proposed by Brown and Tancredi: 2002 MS₄ Salacia Quaoar Varuna Varda 2004 GV₉ 2002 AW₁₉₇ 2002 TX₃₀₀ 2005 RR₄₃ 2003 OP₃₂ 2005 RN₄₃ Possibly: Chaos Altjira Sila-Nunam 2002 UX₂₅ 2007 JJ₄₃ 2005 UQ₅₁₃ 2004 TY₃₆₄ 2003 QW₉₀ 1998 SN₁₆₅ 2002 KX₁₄ Praamzius 2004 NT₃₃ 2010 FX86 2002 CY248 2010 VR11 Rhadamanthus

Scattered disc	IAU: Eris Additional objects proposed by Brown and Tancredi: 2007 OR₁₀ 1996 TL₆₆ 2001 UR₁₆₃ 2005 RM₄₃ Possibly: 2002 TC₃₀₂ 2004 XA₁₉₂ 2005 QU₁₈₂ 2006 QH181 2007 UK₁₂₆ 2010 EK139 2010 KZ39 2010 RE64 2010 RF43 2010 TJ 2013 FY27 2008 OG19 1996 GQ₂₁ 2012 HH₂ 1999 CC₁₅₈ 2006 HH123 2010 VZ98

Area uncertain	Captured satellites that were once dwarf planets: Triton (captured by Neptune) Phoebe (captured by Saturn, and was then disrupted out of equilibrium) Possibly: 2011 FW62 (lost) 2000 YW₁₃₄ V774104

Detached objects	Possibly: 2004 XR190 2010 GB174 2008 ST291 1995 TL₈ 2005 TB₁₉₀ 2003 QX113 2003 FY₁₂₈ 2004 VN112 2000 CR₁₀₅

Sednoids	Objects proposed by Brown and Tancredi: Sedna Possibly: 2012 VP113

Former candidates	Pallas Vesta Hygiea Cybele

See also: Charon Vanth Dysnomia Hiʻiaka Mesoplanet Planemo List of trans-Neptunian objects List of possible dwarf planets List of Solar System objects List of Solar System objects by size

This article is issued from Wikipedia - version of the 11/17/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.