2004 XR190
Number
-
Provisional name
2004 XR190
Class
SDO
Discovery date
11.12.2004
Discovery chart
Discovery position
11 Gemini 22' Rx
Time of announcement
12.12.2005 - 23:35 UT
Orbital period
430.7 years
Orbit
  • almost circular orbit
  • inclination 46.7 degrees
Aphelion
63.535 AU
Perihelion
51.146 AU
Semimajor axis
57.340 AU
Magnitude
4.5
Diameter
240 - 740 km
   
 
This object has been nicknamed "Buffy". It is orbiting about twice as far from the Sun as Neptune and it is the first known object with a nearly circular orbit beyond 50 AU. It has an extreme orbital tilt (about 47 degrees).
 
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