|
Discovery[1]
|
|
|---|---|
| Discovered by | Michael E. Brown, Chad Trujillo |
| Discovery date | May 17, 2002 |
|
Designations
|
|
| MPC designation | (119951) 2002 KX14 |
| Alternate name(s) | none |
| Minor planet category |
TNO cubewano[2] plutino-like |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 6081.698 Gm (40.654 AU) |
| Perihelion | 5594.029 Gm (37.394 AU) |
| Semi-major axis | 5837.864 Gm (39.024 AU) |
| Eccentricity | 0.042 |
| Orbital period | 89041.246 d (243.78 a) |
| Average orbital speed | 4.77 km/s |
| Mean anomaly | 253.196° |
| Inclination | 0.401° |
| Longitude of ascending node | 286.961° |
| Argument of perihelion | 66.276° |
|
Physical characteristics
|
|
| Dimensions | 180 km (2010)[3] <562+220 −182 (2007) km[4] |
| Mass | 2.0×1020? kg |
| Mean density | 2.0? g/cm3 |
| Equatorial surface gravity | 0.1621? m/s2 |
| Escape velocity | 0.3066? km/s |
| Sidereal rotation period |
? d |
| Albedo | >0.08+0.09 −0.04[4] |
| Temperature | ~45 K |
| Spectral type | ? |
| Apparent magnitude | 20.4 (opposition)[5][6] |
| Absolute magnitude (H) | 4.5[1] |
(119951) 2002 KX14, also written as 2002 KX14, is a trans-Neptunian object (TNO) residing within the Kuiper belt. It was discovered on May 17, 2002 by Michael E. Brown and Chad Trujillo.
It has a semi-major axis, orbital period, and orbital eccentricity close to that of a plutino.[7] The orbital periods of plutinos cluster around 247.2 years (1.5 x Neptune's orbital period). But (119951) 2002 KX14 is not classified as a plutino since is not in resonance with Neptune and it may have formed near its present quasi-circular orbit lying almost perfectly on the ecliptic. It may have remained dynamically cold and thus its orbit may not be a direct result of significant perturbations during Neptune's outward planetary migration. The Deep Ecliptic Survey (DES) currently shows it as a cubewano (classical) based on a 10 million year integration of the orbit.[2]
It comes to opposition in late May at an apparent magnitude of 20.4.[5][6] This makes it about 360 times fainter than Pluto.[8]
|
|||||
|
||||||||||||||||||||||
|
||||||||