2012 DR30

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2012 DR30
Discovered by Siding Spring Survey
Discovery date February 22, 2012
(March 2009)
MPC designation 2012 DR30
2009 FW54
Minor planet category trans-Neptunian object
Oort cloud object
Orbital characteristics[1]
Epoch 2014-may-23 (JD 2456400.5)
Aphelion 2405 ±6.0125 AU ± (Q)
~2060 AU[a]
Perihelion 14.54208 ±0.000070229 AU (q)
1209 ±3.0244 AU (a)
~1035 AU[a]
Eccentricity 0.98798 ±0.000029994
≈42100 yr
~33300 yr[a]
0.0272° ±0.00010176
Inclination 77.96371° ±0.000053064
341.40076° ±0.000024291
195.2809° ±0.00044919
Physical characteristics
Dimensions 171 km[3]
~150 km[4][5]

2012 DR30 (2009 FW54)[5][6] is a minor planet (trans-Neptunian object or extended centaur)[2] from the scattered disk/Oort cloud. It has the third-largest heliocentric semi-major axis of a minor planet not detected out-gassing like a comet.[7] (Both 2013 BL76 and 2005 VX3 have larger heliocentric semi-major axes.) 2012 DR30 does have a barycentric semi-major axis of 1,035 AU.[8][a]

2012 DR30 came to perihelion in March 2011 at a distance of 14.5 AU from the Sun (inside the orbit of Uranus). With an absolute magnitude (H) of 7.1,[2] the object has an estimated diameter of 150 km.[4][5]


  1. ^ a b c d Given the orbital eccentricity of this object, different epochs can generate quite different heliocentric unperturbed two-body best-fit solutions to the semi-major axis and orbital period. For objects at such high eccentricity, the Sun's barycentric coordinates are more stable than heliocentric coordinates.[9] Using JPL Horizons, the barycentric semi-major axis is approximately 1,035 AU.[8]


  1. ^ a b Ernesto Guido, Giovanni Sostero and Nick Howes (2012-02-27). "Trans-Neptunian Object 2012 DR30". Remanzacco Observatory in Italy. Retrieved 2013-08-25. 
  2. ^ a b c d "2012 DR30 = 2009 FW54". IAU minor planet center. Retrieved 2013-07-11. 
  3. ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2014-02-16. 
  4. ^ a b "Absolute Magnitude (H)". NASA/JPL. Retrieved 2013-10-13. 
  5. ^ a b c Ian Musgrave (2012-03-01). "2012 DR30, no, it's not a comet, it's 2009 FW54". itelescope.net. Retrieved 2013-08-25. 
  6. ^ 2012 DR30 - Ein Transneptun mit ungewöhnlicher Bahn
  7. ^ "JPL Small-Body Database Search Engine: Asteroids and a > 100 (AU)". JPL Solar System Dynamics. Retrieved 2013-10-13. 
  8. ^ a b Horizons output. "Barycentric Osculating Orbital Elements for 2012 DR30". Retrieved 2014-03-06.  (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0)
  9. ^ Kaib, Nathan A.; Becker, Andrew C.; Jones, R. Lynne; Puckett, Andrew W.; Bizyaev, Dmitry; Dilday, Benjamin; Frieman, Joshua A.; Oravetz, Daniel J.; Pan, Kaike; Quinn, Thomas; Schneider, Donald P.; Watters, Shannon (2009). "2006 SQ372: A Likely Long-Period Comet from the Inner Oort Cloud". The Astrophysical Journal 695 (1): 268–275. arXiv:0901.1690. Bibcode:2009ApJ...695..268K. doi:10.1088/0004-637X/695/1/268. 

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