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2003 Qx113

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2003 Qx113

2003 QX113
Discovery date 2003
MPC designation 2003 QX113
Minor planet category Detached object[2]
Orbital characteristics[3]
Epoch June 18, 2009 (2455000.5)
Aphelion 62.257 AU (Q)
Perihelion 37.486 AU (q)
Semi-major axis 49.871 AU (a)
Eccentricity 0.24834
Orbital period 352.20 yr
Mean anomaly 128.89° (M)
Inclination 6.734°
Longitude of ascending node 158.09°
Argument of perihelion 26.273°
Physical characteristics
Dimensions 505 km (assumed)[4]
Albedo 0.09 (assumed)
Apparent magnitude 22.6[5]
Absolute magnitude (H) 4.7[3]

2003 QX113, also written as 2003 QX113, is a detached object[2] that was discovered when it was near aphelion. With an absolute magnitude of 4.9,[3] it may be a dwarf planet.

It is currently 59 AU from the Sun,[5] and will come to aphelion around 2058.[6] It last came to perihelion around 1883.[3] This makes it currently one of the most distant known large bodies (59AU)[5] in the solar system after Eris (96.7AU), Sedna (88AU), 2007 OR10 (86AU), and 2006 QH181 (82AU).

Assumed size

When 2003 QX113 was first discovered it was estimated to have an absolute magnitude (H) of 4.9[1] giving it an assumed size of only 461 km in diameter.[4] As of 2010, 2003 QX113 is estimated to have a brighter absolute magnitude (H) of 4.7.[3] Assuming it is a trans-Neptunian object with a generic albedo of 0.09, it is about 505 km in diameter.[4]

It has been observed 23 times over 6 oppositions and has an orbit quality of 4.[3]


External links

  • Horizons Ephemeris
  • What is the most distant body in the Solar System? A historical view (Michael Richmond)
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