(668643) 2012 DR30
(668643) 2012 DR30 is a trans-Neptunian object and centaur from the scattered disk and/or inner Oort cloud, located in the outermost region of the Solar System. The object with a highly eccentric orbit of 0.99 was first observed by astronomers with the Spacewatch program at Steward Observatory on 31 March 2009.[2] It measures approximately 188 kilometers (120 miles) in diameter.
Description
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][a] For the epoch of July 2018 2012 DR30 will have its largest heliocentric semi-major axis of 1644 AU.
Orbital evolution | ||
Year[a] (epoch) | Barycentric Aphelion (Q) (AU) | Orbital period years |
---|---|---|
1950 | 2000 | 32000 |
2050 | 2049 | 33100 |
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 2018, it will move from 18.2 AU to 19.1 AU from the Sun.[8] It comes to opposition in late March. With an absolute magnitude (H) of 7.1,[2] the object has a published diameter of 185 and 188 kilometers, respectively.[5][6]
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.[a] 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[a]
- aphelion: ~2049 AU[a]
- period: ~33,100 yr[a]
Archived data from the JPL SBDB and MPC.[b][c]
Comparison
See also
- 2002 RN109
- 2005 VX3
- (308933) 2006 SQ372
- 2007 TG422
- 90377 Sedna
- List of hyperbolic comets
- Planet Nine
Notes
- ^ a b c d e f g 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]
- ^ a b Archived JPL Small-Body Database Browser: (2012 DR30) from 15 October 2014.
- ^ a b Archived MPC object data for 2012 DR30 (2009 FW54) from 12 July 2013.
References
- ^ a b c d e f "JPL Small-Body Database Browser: (2012 DR30)" (2014-12-17 last obs.). Jet Propulsion Laboratory. Archived from the original on 27 July 2020. Retrieved 19 November 2018.
- ^ a b c d e f g "2012 DR30". Minor Planet Center. Archived from the original on 15 February 2017. Retrieved 19 November 2018.
- ^ Ernesto Guido; Giovanni Sostero & Nick Howes (27 February 2012). "Trans-Neptunian Object 2012 DR30". Remanzacco Observatory in Italy. Archived from the original on 25 March 2018. Retrieved 25 August 2013.
- ^ a b Marc W. Buie. "Orbit Fit and Astrometric record for 12DR30". SwRI – Space Science Department. Archived from the original on 5 February 2016. Retrieved 1 February 2016.
- ^ a b c d 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". Astronomy and Astrophysics. 555: 13. arXiv:1304.7112. Bibcode:2013A&A...555A...3K. doi:10.1051/0004-6361/201321147. S2CID 54021504.
- ^ a b c d e f Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 23 October 2019. Retrieved 19 November 2018.
- ^ JPL Horizons Archived 28 November 2020 at the Wayback Machine Observer Location: @sun
- ^ a b "AstDyS 2012DR30 Ephemerides". Department of Mathematics, University of Pisa, Italy. Archived from the original on 3 May 2024. Retrieved 14 February 2017. (Distance to Sun [R] from first day of 2016 to first day of 2020. Assuming average apparent magnitude for 2017.)
- ^ "JPL Small-Body Database Search Engine: Asteroids and a > 100 (AU)". JPL Solar System Dynamics. Archived from the original on 29 November 2020. Retrieved 15 October 2014.
- ^ a b Horizons output. "Barycentric Osculating Orbital Elements for 2012 DR30". Archived from the original on 28 November 2020. Retrieved 6 March 2014. (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". The Astrophysical Journal. 695 (1): 268–275. arXiv:0901.1690. Bibcode:2009ApJ...695..268K. doi:10.1088/0004-637X/695/1/268. S2CID 16987581.
External links
- 2012 DR30 - Ein Transneptun mit ungewöhnlicher Bahn, www.spektrum.de, March 2012 (in German)
- 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 Archived 15 January 2020 at the Wayback Machine (Seiichi Yoshida)
- Webcite archive of Epoch 2016-Jan-13 with aphelion (Q) of 2789 AU
- (668643) 2012 DR30 at AstDyS-2, Asteroids—Dynamic Site
- Ephemeris · Observation prediction · Orbital info · Proper elements · Observational info
- (668643) 2012 DR30 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters
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