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(432949) 2012 HH2

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2012 HH2
Discovery animation of the TNO 2012 HH2
Astronomical Research Institute (H21) discovery animation of 2012 HH2
Discovery
Discovered byT. Vorobjov (H20)[1]
Discovery date19 April 2012
Designations
2012 HH2
TNO
Centaur (DES)[2]
Orbital characteristics[1][3]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc5049 days (13.82 yr)
Aphelion41.045 AU (6.1402 Tm) (Q)
Perihelion29.183 AU (4.3657 Tm) (q)
35.114 AU (5.2530 Tm) (a)
Eccentricity0.16890 (e)
208.08 yr (76002.3 d)
29.957° (M)
0° 0m 17.052s / day (n)
Inclination28.559° (i)
56.480° (Ω)
101.15° (ω)
Earth MOID28.3119 AU (4.23540 Tm)
Jupiter MOID24.4428 AU (3.65659 Tm)
TJupiter4.646
Physical characteristics
Dimensions170–300 km[1]
6.4[1]

(432949) 2012 HH2 is a trans-Neptunian object (TNO) and weak dwarf planet candidate.[4] It was discovered by Tomáš Vorobjov from images taken on the night of April 19, 2012 at the Astronomical Research Observatory (H21). The object has been observed forty-two times[1][3] over two oppositions.[1] It is currently 29.8 AU from the Sun.

References

  1. ^ a b c d e f "JPL Small-Body Database Browser: (2012 HH2)" (2012-06-10 last obs). Retrieved 8 April 2016.
  2. ^ 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.
  3. ^ a b "2012 HH2". IAU Minor Planet Center. Retrieved 2012-06-14.
  4. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 31 August 2016.