Supriya Ghosh (Editor)

(307261) 2002 MS4

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Discovery date
  
18 June 2002

Alternative names
  
none

Orbital period
  
269 years

Inclination
  
17.677°

Discovery site
  
MPC designation
  
2002 MS4

Observation arc
  
20569 days (56.31 yr)

Discovered
  
18 June 2002

Apparent magnitude (V)
  
20.6

(307261) 2002 MS4 wwwgoastronomycomimagesplanetsplanet2002ms

Discovered by
  
Chad Trujillo,Michael E. Brown

Minor planet category
  
Cubewano (MPC)ScatExt (DES)

Discoverers
  
Michael E. Brown, Chad Trujillo

Similar
  
Michael E Brown discoveries, Other celestial objects

(307261) 2002 MS4 is a large classical Kuiper belt object, the second-largest known object in the Solar System without a name, after 2007 OR10. It was discovered in 2002 by Chad Trujillo and Michael Brown.

Brown's website lists it as nearly certain to be a dwarf planet. The Spitzer Space Telescope estimated it to have a diameter of 7005726000000000000♠726±123 km. The Herschel team estimates it to be 7005934000000000000♠934±47 km, which would make it one of the 10 largest TNOs currently known and large enough to be considered a dwarf planet under the 2006 draft proposal of the IAU. It is currently 47.2 AU from the Sun and will come to perihelion in 2123.

It has been observed 55 times, with precovery images back to 1954.

References

(307261) 2002 MS4 Wikipedia


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