(91133) 1998 HK151

(91133) 1998 HK₁₅₁

Discovery
Discovered by	Mauna Kea Observatory
Discovery date	28 April 1998
Designations
Minor planet category	plutino (TNO)
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc	1178 days (3.23 yr)
Aphelion	48.529 AU (7.2598 Tm)
Perihelion	30.347 AU (4.5398 Tm)
Semi-major axis	39.438 AU (5.8998 Tm)
Eccentricity	0.23052
Orbital period	247.67 yr (90462.3 d)
Mean anomaly	25.159°
Mean motion	0° 0^m 14.327^s / day
Inclination	5.9365°
Longitude of ascending node	50.194°
Argument of perihelion	180.55°
Earth MOID	29.3356 AU (4.38854 Tm)
Jupiter MOID	24.9381 AU (3.73069 Tm)
Jupiter Tisserand parameter	5.461
Physical characteristics
Dimensions	85-190km ^H
Spectral type	(Blueish;lowest TNO B-V) B-V=0.51; V-R=0.43[2]
Absolute magnitude (H)	7.6

(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.

References

1. "91133 (1998 HK151)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 8 April 2016.
2. "TNO Colors". Planetary Data System (PDS Asteroid/Dust Archive).

External links

• 2:3 Resonance
• KBO Surface Colors
• Orbital simulation from JPL (Java) / Ephemeris
• Hanging with Pluto
• (91133) 1998 HK151 at the JPL Small-Body Database

• Discovery · Orbit diagram · Orbital elements · Physical parameters