|Discovery date 28 April 1998|
Aphelion 48.529 AU (7.2598 Tm)
Semi-major axis 39.438 AU (5.8998 Tm)
Discovered 28 April 1998
Discovery site Mauna Kea Observatories
|Observation arc 1178 days (3.23 yr)|
Perihelion 30.347 AU (4.5398 Tm)
Absolute magnitude 7.6
Discovered by Mauna Kea Observatories
People also search for (69990) 1998 WU31
|Minor planet category Plutino (Trans-Neptunian object)|
(91133) 1998 HK151 (better known as 1998 HK151) is a plutino with a 2:3 resonance with Neptune. It was discovered on April 28, 1998, by the Mauna Kea Observatory.
1998 HK151 has the lowest, and thus bluest measured B-V color index of any TNO. On May 24, 2000, 1998 HK151 set a TNO record low B-V of 0.51. Reddening of the spectrum is caused by cosmic irradiaton by ultraviolet radiation and charged particles. Becoming bluer in the spectrum is caused by impact collisions exposing the interior of an object.
Based on an absolute magnitude (H) of 7.62, 1998 HK151 is estimated to be between 85 – 190 km in diameter.