2010 EK139

From Infogalactic: the planetary knowledge core
Jump to: navigation, search
2010 EK139
2010 EK139
Discovery[1]
Discovered by A. Udalski
S. S. Sheppard
M. Kubiak
C. Trujillo
Las Campanas Observatory (304)
Discovery date 13 March 2010
Designations
MPC designation 2010 EK139
TNO (SDO)[2]
2:7[3]
Orbital characteristics[5]
Epoch 18 April 2013 (JD 2456400.5)
Aphelion 105.57 AU (Q)
Perihelion 32.515 AU (q)
69.04 AU (a)
Eccentricity 0.5291
573.7 yr
343.90° (M)
Inclination 29.4529°
346.1636°
284.74°
Known satellites None[4]
Physical characteristics
Dimensions 470+35
−10
km [4]
0.295 d (7.07 h)[5]
Albedo 0.25+0.02
−0.05
[4]
19.9 [6]
19.6R [3]
3.8 ± 0.1 [4]

2010 EK139[7] is a trans-Neptunian object orbiting the Sun in the scattered disc. It was discovered in 2010 by astronomers from the OGLE team led by Andrzej Udalski from Warsaw University.[8] With an absolute magnitude (H) of 3.8,[5] it is very likely a dwarf planet.[9]

Distance

It will come to perihelion around 2038[5] and is currently 39.1 AU from the Sun.[6]

It has been observed 122 times over five oppositions and has an orbit quality of 2.[5] There are precovery images dating back to 2002.[3] A ten-million-year integration of the orbit shows that this object is in a 2:7 resonance with Neptune.[3]

Physical properties

In 2010, the thermal radiation of 2010 EK139 was observed by the Herschel Space Telescope, which allowed astronomers to estimate its diameter at about 470 kilometres (290 mi).[4]

Observations by Mike Brown, using the Keck telescope in March 2012, suggest that there is no satellite, which makes determination of its mass impossible.[4]

See also

References

  1. Lua error in package.lua at line 80: module 'strict' not found.
  2. Lua error in package.lua at line 80: module 'strict' not found.
  3. 3.0 3.1 3.2 3.3 Lua error in package.lua at line 80: module 'strict' not found.
  4. 4.0 4.1 4.2 4.3 4.4 4.5 Lua error in package.lua at line 80: module 'strict' not found.
  5. 5.0 5.1 5.2 5.3 5.4 Lua error in package.lua at line 80: module 'strict' not found.
  6. 6.0 6.1 Lua error in package.lua at line 80: module 'strict' not found.
  7. Lua error in package.lua at line 80: module 'strict' not found.
  8. Lua error in package.lua at line 80: module 'strict' not found. (English translation)
  9. Lua error in package.lua at line 80: module 'strict' not found.

External links