(432949) 2012 HH2
Appearance
Discovery | |
---|---|
Discovered by | T. Vorobjov (H20)[1] |
Discovery date | 19 April 2012 |
Designations | |
2012 HH2 | |
TNO Centaur (DES)[2] | |
Orbital characteristics[1][3] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 3 | |
Observation arc | 5049 days (13.82 yr) |
Aphelion | 41.045 AU (6.1402 Tm) (Q) |
Perihelion | 29.183 AU (4.3657 Tm) (q) |
35.114 AU (5.2530 Tm) (a) | |
Eccentricity | 0.16890 (e) |
208.08 yr (76002.3 d) | |
29.957° (M) | |
0° 0m 17.052s / day (n) | |
Inclination | 28.559° (i) |
56.480° (Ω) | |
101.15° (ω) | |
Earth MOID | 28.3119 AU (4.23540 Tm) |
Jupiter MOID | 24.4428 AU (3.65659 Tm) |
TJupiter | 4.646 |
Physical characteristics | |
Dimensions | 170–300 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
- ^ a b c d e f "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. Retrieved 2012-06-14.
- ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 31 August 2016.
External links
- MPEC 2012-H36 : DAILY ORBIT UPDATE (2012 APR. 21 UT) (Discovery mention on Daily Orbit Update)
- MPEC 2012-L20 : 2012 HH2 (Revision to MPEC 2012-J31)
- Orbital simulation from JPL (Java) / Horizons Ephemeris
- (432949) 2012 HH2 at the JPL Small-Body Database