2012 DR30
Discovery [1][2][3] | |
---|---|
Discovered by | Spacewatch |
Discovery site | Kitt Peak |
Discovery date | 31 March 2009 |
Designations | |
MPC designation | 2012 DR30 |
2009 FW54 | |
Distant [2] · TNO [1] centaur [4][5] Damocloid | |
Orbital characteristics [1] | |
Epoch 16 February 2017 (JD 2457800.5)[lower-alpha 1] | |
Uncertainty parameter 0 | |
Observation arc | 14.72 yr (5,375 days) |
Aphelion |
3070 AU 2049 AU (barycentric)[lower-alpha 1] |
Perihelion | 14.559 AU |
1542 AU 1032 AU (barycentric)[lower-alpha 1] | |
Eccentricity | 0.9906 |
60,579 yr 33100 yr (barycentric)[lower-alpha 1] | |
0.0350° | |
0° 0m 0s / day | |
Inclination | 77.960° |
341.40° | |
195.50° | |
Jupiter MOID | 9.305 AU |
Saturn MOID | 5.46 AU[2] |
Uranus MOID | 3.41 AU[2] |
Jupiter Tisserand parameter | 0.988 |
Physical characteristics | |
Dimensions | 185 km[5] |
~0.08[5] | |
B–V = 1.10[1] | |
19.9[6] | |
7.1[1][2] | |
|
2012 DR30 also provisionally designated 2009 FW54 is a trans-Neptunian[1] centaur[5][4] from the scattered disk/Inner Oort cloud, approximately 185–200 kilometers in diameter.[7][8]
Using an epoch of February 2017, it has the second-largest heliocentric semi-major axis of a minor planet not detected out-gassing like a comet.[9] (2014 FE72 has a larger heliocentric semi-major axis.) 2012 DR30 does have a barycentric semi-major axis of 1032 AU.[10][lower-alpha 1] The epoch of July 2018 will be when 2012 DR30 will have its largest heliocentric semi-major axis of 1644 AU.
2012 DR30 passed 5.7 AU from Saturn in February 2009 and came to perihelion in March 2011 at a distance of 14.5 AU from the Sun (inside the orbit of Uranus).[1] In 2017, it will move from 17.3 AU to 18.2 AU from the Sun.[6] It comes to opposition in late March. With an absolute magnitude (H) of 7.1,[2] the object has an estimated diameter of 185 km.[5][7]
With an observation arc of 14.7 years,[1] 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.[lower-alpha 1]
Orbital evolution | |||||||
Year (epoch) | Barycentric Aphelion (Q) (AU) | Orbital period years | |||||
---|---|---|---|---|---|---|---|
1950 | 2000 | 32000 | |||||
2050 | 2049 | 33100 |
In a 10 million year integration of the orbit, the nominal (best-fit) orbit and both 3-sigma clones remain outside 12.2 AU (qmin) from the Sun.[4]
Summary of barycentric orbital parameters are:
- Semi-major axis: ~1032 AU[lower-alpha 1]
- aphelion: ~2049 AU[lower-alpha 1]
- period: ~33,100 yr[lower-alpha 1]
Comparison
See also
- 2002 RN109
- 2005 VX3
- (308933) 2006 SQ372
- 2007 TG422
- 90377 Sedna
- List of hyperbolic comets
- Planet Nine
Notes
- 1 2 3 4 5 6 7 8 9 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 barycenter is more stable than heliocentric coordinates.[11] Using JPL Horizons, the barycentric semi-major axis is approximately 1032 AU.[10]
References
- 1 2 3 4 5 6 7 8 "JPL Small-Body Database Browser: (2012 DR30)" (2014-12-17 last obs.). Jet Propulsion Laboratory. Archived from the original on 15 October 2014. Retrieved 14 February 2017.
- 1 2 3 4 5 6 "2012 DR30 (2009 FW54)". Minor Planet Center. Archived from the original on 12 July 2013. Retrieved 14 February 2017.
- ↑ Ernesto Guido; Giovanni Sostero & Nick Howes (2012-02-27). "Trans-Neptunian Object 2012 DR30". Remanzacco Observatory in Italy. Retrieved 2013-08-25.
- 1 2 3 Marc W. Buie. "Orbit Fit and Astrometric record for 12DR30". SwRI – Space Science Department. Archived from the original on 2016-02-05. Retrieved 2016-02-01.
- 1 2 3 4 5 Kiss, Cs.; Szabó, Gy.; Horner, J.; Conn, B. C.; Müller, T. G.; Vilenius, E.; et al. (July 2013). "A portrait of the extreme solar system object 2012 DR30" (PDF). Astronomy and Astrophysics. 555: 13. Bibcode:2013A&A...555A...3K. arXiv:1304.7112 . doi:10.1051/0004-6361/201321147. Retrieved 15 February 2017.
- 1 2 "AstDyS 2012DR30 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2017-02-14. (Distance to Sun [R] from first day of 2016 to first day of 2020. Assuming average apparent magnitude for 2017.)
- 1 2 Ian Musgrave (2012-03-01). "2012 DR30, no, it's not a comet, it's 2009 FW54". itelescope.net. Retrieved 2013-08-25.
- ↑ 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.
- 1 2 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; et al. (April 2009). "2006 SQ372: A Likely Long-Period Comet from the Inner Oort Cloud" (PDF). The Astrophysical Journal. 695 (1): 268–275. Bibcode:2009ApJ...695..268K. arXiv:0901.1690 . doi:10.1088/0004-637X/695/1/268. Retrieved 15 February 2017.
External links
- JPL Small-Body Database Browser (2012 DR30 = 2009 FW54)
- Mysterious solar system object 2012 DR30: period ~50,000 years, inclination 75°, perihelion 14 AU
- Transneptunian Object 2012 DR30 - Is it a comet?
- Images 2012 DR30
- 2012 DR30 (Seiichi Yoshida)
- Webcite archive of Epoch 2016-Jan-13 with aphelion (Q) of 2789AU
- 2012 DR30 at the JPL Small-Body Database