(432949) 2012 HH₂

2012 HH₂
	Astronomical Research Institute discovery animation of 2012 HH2
Discovery
Discovered by	T. Vorobjov (H20)
Discovery date	19 April 2012
Designations
MPC designation	2012 HH2
Minor planet category	TNO; centaur (DES)
Orbital characteristics
	Epoch 4 September 2017 (JD 2458000.5)
	Uncertainty parameter 2
Observation arc	13.93 yr (5,087 days)
Aphelion	41.015 AU
Perihelion	29.221 AU
Semi-major axis	35.118 AU
Eccentricity	0.1679
Orbital period (sidereal)	208.11 yr (76,013 days)
Mean anomaly	32.421°
Mean motion	0° 0m 16.92s / day
Inclination	28.534°
Longitude of ascending node	56.518°
Argument of perihelion	101.69°
Physical characteristics
Dimensions	170–300 km
Absolute magnitude (H)	6.3

(432949) 2012 HH₂ is a trans-Neptunian object (TNO) and weak dwarf planet candidate.^[4] It was discovered by Slovak astronomer Tomáš Vorobjov from images taken on the night of 19 April 2012, at the Astronomical Research Institute in Illinois, United States. The object has been observed forty-two times^[1]^[3] over two oppositions.^[1] It is currently 29.8 AU from the Sun.

References

^ ^a ^b ^c ^d ^e "JPL Small-Body Database Browser: (2012 HH2)" (2012-06-10 last obs). Retrieved 8 April 2016.
^ Marc W. Buie (2013-02-09). "Orbit Fit and Astrometric record for 12HH2". SwRI (Space Science Department). Archived from the original on 2014-09-07. Retrieved 2013-02-08.
^ ^a ^b "2012 HH2". IAU Minor Planet Center. Archived from the original on 2016-03-03. Retrieved 2012-06-14. {{cite web}}: Unknown parameter |dead-url= ignored (|url-status= suggested) (help)
^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 31 August 2016.