Astronomy:(432949) 2012 HH2

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2012 HH2
Discovery animation of the TNO 2012 HH2
Astronomical Research Institute discovery animation of 2012 HH2
Discovery
Discovered byT. Vorobjov (H20)[1]
Discovery date19 April 2012
Designations
2012 HH2
Minor planet categoryTNO
centaur (DES)[2]
Orbital characteristics[1][3]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 2
Observation arc13.93 yr (5,087 days)
|{{{apsis}}}|helion}}41.015 AU
|{{{apsis}}}|helion}}29.221 AU
35.118 AU
Eccentricity0.1679
Orbital period208.11 yr (76,013 days)
Mean anomaly32.421°
Mean motion0° 0m 16.92s / day
Inclination28.534°
Longitude of ascending node56.518°
101.69°
Physical characteristics
Dimensions170–300 km
Absolute magnitude (H)6.3[1]


(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

  1. ↑ 1.0 1.1 1.2 1.3 1.4 "JPL Small-Body Database Browser: (2012 HH2)". https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2012+HH2. 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. https://web.archive.org/web/20140907171935/http://www.boulder.swri.edu/~buie/kbo/astrom/12HH2.html. Retrieved 2013-02-08. 
  3. ↑ 3.0 3.1 "2012 HH2". IAU Minor Planet Center. http://scully.cfa.harvard.edu/cgi-bin/mpeph2.cgi?ty=e&TextArea=2012+HH2&d=&l=&i=&u=d&uto=0&c=&long=&lat=&alt=&raty=a&s=t&m=m&adir=S&oed=&e=0&res=y&resoc=&tit=&bu=&ch=c&ce=f&js=f. 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. http://web.gps.caltech.edu/~mbrown/dps.html. Retrieved 31 August 2016. 

External links




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