2002 GB32

2002 GB₃₂

2002 GB32 is seen lower right in blue with hypothetical Planet Nine in green
Discovery [1]
Discovered by	M. W. Buie [2]
Discovery site	Cerro Tololo Obs.
Discovery date	7 April 2002
Designations
MPC designation	2002 GB32
Minor planet category	TNO [3]  · SDO [2] [4] distant [1]  · detached
Orbital characteristics [3]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 3
Observation arc	12.96 yr (4,733 days)
Aphelion	402.66 AU
Perihelion	35.347 AU
Semi-major axis	219.01 AU
Eccentricity	0.8386
Orbital period (sidereal)	3241.10 yr (1,183,810 days)
Mean anomaly	0.3780°
Mean motion	0° 0m 1.08s / day
Inclination	14.176°
Longitude of ascending node	176.99°
Argument of perihelion	37.158°
Physical characteristics
Dimensions	122 km (calculated) [4]
Geometric albedo	0.09 (assumed) [4]
Absolute magnitude (H)	7.8 [3]

2002 GB₃₂ is a trans-Neptunian object from the scattered disc in the outermost region of the Solar System, approximately 122 kilometers in diameter. ^{[3] [4]} It was first observed on 7 April 2002, by American astronomer Marc Buie at Cerro Tololo Observatory in Chile. ^{[1] [2]}

Description

2002 GB₃₂ belongs to a small number of detached objects with perihelion distances of 30  AU or more, and semi-major axis of 200 AU or more. ^[5] Such objects can not reach such orbits without some perturbing object, which leads to the speculation of Planet Nine.

This minor planet orbits the Sun at a distance of 35.3–402.7 AU once every 3,241 years and 1 month (1,183,810 days). Its orbit has an eccentricity of 0.84 and an inclination of 14° with respect to the ecliptic. ^[3]

Based on an absolute magnitude of 7.8 and an assumed albedo of 0.09, Johnston's Archive calculated a mean-diameter of 122 kilometers. ^[4]

See also

• List of trans-Neptunian objects § Unnumbered TNOs

References

1. "2002 GB32". Minor Planet Center. Retrieved 17 October 2017.
2. "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 14 October 2017.
3. "JPL Small-Body Database Browser: (2002 GB32)" (2015-03-23 last obs.). Jet Propulsion Laboratory . Retrieved 17 October 2017.
4. "List of known Trans-Neptunian Objects". Johnston's Archive. Retrieved 14 October 2017.
5. minorplanetcenter.net: q>30, a>200

External links

• List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
• List of known Trans-Neptunian Objects, Johnston's Archive
• 2002 GB32 at AstDyS-2, Asteroids—Dynamic Site
  • Ephemeris  · Observation prediction  · Orbital info  · Proper elements  · Observational info
• 2002 GB32 at the JPL Small-Body Database
  • Close approach  · Discovery  · Ephemeris  · Orbit viewer  · Orbit parameters  · Physical parameters