(668643) 2012 DR30
| Discovery[1] | |
|---|---|
| Discovered by | Siding Spring Survey |
| Discovery date | February 22, 2012 (March 2009) |
| Designations | |
Designation | 2012 DR30 |
| 2009 FW54 | |
| Trans-Neptunian object Centaur[2] Oort cloud object Damocloid | |
| Orbital characteristics[3] | |
| Epoch 2014-Dec-09 (JD 2457000.5) | |
| Observation arc | 14.7 yr |
| Aphelion | 2512 ± 5.4 AU (Q) ~2049 AU[a] |
| Perihelion | 14.54433 AU (q) |
| 1263.5 ± 2.7 AU (a) ~1032 AU[a] | |
| Eccentricity | 0.98849 |
| 44913 ± 146 yr ~33100 yr[a] | |
| 0.02987 | |
| Inclination | 77.95693° |
| 341.39371° | |
| 195.3195° | |
| Physical characteristics | |
| Dimensions | 171 km[4] ~150 km[5][6] |
| 19.5 | |
| 7.1[7] | |
2012 DR30 (2009 FW54)[6][8] is a minor planet (trans-Neptunian object or extended centaur)[2] from the scattered disk/Oort cloud. Using an epoch of December 2014, it has the second-largest heliocentric semi-major axis of a minor planet not detected out-gassing like a comet.[9] (2005 VX3 has a larger heliocentric semi-major axis.) 2012 DR30 does have a barycentric semi-major axis of 1,032 AU.[10][a]
2012 DR30 came to perihelion in March 2011 at a distance of 14.5 AU from the Sun (inside the orbit of Uranus). As of 2016[update], it is 16 AU from the Sun. With an absolute magnitude (H) of 7.1,[7] the object has an estimated diameter of 150 km.[5][6]
With an observation arc of 14.7 years,[3] it has a well constrained orbit. It will not be 50 AU from the Sun until 2047. After leaving the planetary region of the Solar System, 2012 DR30 will have a barycentric aphelion of 2049 AU with an orbital period of 33100 years.[a]
Comparison
See also
- 2002 RN109
- 2005 VX3
- (308933) 2006 SQ372
- 2007 TG422
- 90377 Sedna
- List of hyperbolic comets
- Planet Nine[citation needed]
Notes
- ^ a b c d e 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.[11] Using JPL Horizons, the barycentric semi-major axis is approximately 1,032 AU.[10]
References
- ^ Ernesto Guido; Giovanni Sostero; Nick Howes (2012-02-27). "Trans-Neptunian Object 2012 DR30". Remanzacco Observatory in Italy. Retrieved 2013-08-25.
{{cite web}}: Unknown parameter|last-author-amp=ignored (|name-list-style=suggested) (help) - ^ a b Marc W. Buie. "Orbit Fit and Astrometric record for 12DR30". SwRI (Space Science Department). Retrieved 2016-02-01.
- ^ a b "JPL Small-Body Database Browser: (2012 DR30)" (last observation: 2014-04-20; arc: 14.04 years). Jet Propulsion Laboratory. Retrieved 2014-10-15.
- ^ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2014-02-16.
- ^ a b "Absolute Magnitude (H)". NASA/JPL. Retrieved 2013-10-13.
- ^ 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.
- ^ a b "2012 DR30 = 2009 FW54". IAU minor planet center. Retrieved 2013-07-11.
- ^ 2012 DR30 - Ein Transneptun mit ungewöhnlicher Bahn
- ^ "JPL Small-Body Database Search Engine: Asteroids and a > 100 (AU)". JPL Solar System Dynamics. Retrieved 2014-10-15. (Epoch defined at will change every 6 months or so)
- ^ 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)
- ^ 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.
