(119979) 2002 WC19

From Wikipedia, the free encyclopedia
Jump to: navigation, search
(119979) 2002 WC19
Discovery
Discovered by Palomar Observatory
Discovery date November 16, 2002
Designations
MPC designation (119979) 2002 WC19
Minor planet category Twotino[1][2]
Orbital characteristics[4]
Epoch JD 2457000.5 (9 December 2014)
Aphelion 60.94 AU
Perihelion 35.361 AU
48.151 AU
Eccentricity 0.26564
334.13 yr (122,042 d)
315.34°
Inclination 9.1685°
109.7742°
43.75°
Known satellites 1 (≈127 km)[3]
Physical characteristics
Dimensions ≈440 km (assumed)[3]
Albedo 0.07 (expected from theory)[5]
4.9 (combined system)

(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
2002WC19-orbit.png
1:2 libration
TNO-2002WC19.gif
Neptune is held stationary at 5 o'clock.

Satellite[edit]

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.[3]

References[edit]

  1. ^ 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. 
  2. ^ "MPEC 2009-C70 :Distant Minor Planets (2009 February 28.0 TT)". Minor Planet Center. 2009-02-10. Retrieved 2009-03-04. 
  3. ^ a b c Wm. Robert Johnston (20 September 2014). "(119979) 2002 WC19". Johnston's Archive. Retrieved 2014-11-15. 
  4. ^ "JPL Small-Body Database Browser: 119979 (2002 WC19)" (2012-11-06 last obs; arc: 10.89 years). Retrieved 2014-11-15. 
  5. ^ a b Mike Brown, How many dwarf planets are there in the outer solar system?
  6. ^ Ron Cowen (2009-01-04). "On the Fringe". ScienceNews. Archived from the original on 7 January 2010. Retrieved 2010-01-04. 

External links[edit]