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2012 VP₁₁₃
	2012 VP113 imaged by the Canada–France–Hawaii Telescope on 9 October 2021
Discovery
Discovered by	S. S. Sheppard; C. Trujillo;
Discovery site	Cerro Tololo Obs.
Discovery date	5 November 2012; (announced: 26 March 2014)
Designations
MPC designation	2012 VP113
Alternative designations	"Biden" (nickname)
Minor planet category	TNO; sednoid;
Orbital characteristics
	Epoch 2022 Aug 09 (JD 2459800.5)
	Uncertainty parameter 4
Observation arc	8.29 yr (3,028 d)
Aphelion	462±1 AU
Perihelion	80.522 AU; 80.47±0.03 AU;
Semi-major axis	271.5±0.6 AU
Eccentricity	0.7036±0.0007
Orbital period (sidereal)	4473±14 yr; 4240 yr (barycentric);
Mean anomaly	3.50°±0.01°
Mean motion	0° 0m 0.792s / day
Inclination	24.0563°±0.006°
Longitude of ascending node	90.787°
Time of perihelion	≈ 28 September 1979
Argument of perihelion	293.8°
Physical characteristics
Mean diameter	574 km?; 300–1000 km
Geometric albedo	0.09 (assumed); 0.15 (assumed);
Spectral type	moderately red; V−R = 0.52; B−V = 0.92;
Apparent magnitude	23.34
Absolute magnitude (H)	4.1

2012 VP₁₁₃, also known by its nickname "Biden", is a trans-Neptunian object of the sednoid population, located in the outermost reaches of the Solar System. It was first observed on 5 November 2012 by American astronomers Scott Sheppard and Chad Trujillo at the Cerro Tololo Inter-American Observatory in Chile.^[1]^[2] The discovery was announced on 26 March 2014.^[10]^[12] The object probably measures somewhere between 300 and 1000 km in diameter, possibly large enough to be a dwarf planet.

Classification and physical characteristics

2012 VP₁₁₃ is the minor planet with the farthest known perihelion (closest approach to the Sun) in the Solar System, greater than Sedna's.^[13] Though its perihelion is farther, 2012 VP₁₁₃ has an aphelion only about half of Sedna's. It is the second discovered sednoid, with semi-major axis beyond 150 AU and perihelion greater than 50 AU. The similarity of the orbit of 2012 VP₁₁₃ to other known extreme trans-Neptunian objects led Scott Sheppard and Chad Trujillo to suggest that an undiscovered object, Planet Nine, in the outer Solar System is shepherding these distant objects into similar type orbits.^[10]

It has an absolute magnitude of 4.0,^[1] which means it may be large enough to be a dwarf planet.^[14] It is expected to be about half the size of Sedna and similar in size to Huya.^[8] Its surface is moderately red in color, resulting from chemical changes produced by the effect of radiation on frozen water, methane, and carbon dioxide. ^[15] This optical color is consistent with formation in the gas-giant region and not the classical Kuiper belt, which is dominated by ultra-red colored objects.^[10]

History

Discovery

2012 VP₁₁₃ was first observed on 5 November 2012^[2] with NOAO's 4-meter Víctor M. Blanco Telescope at the Cerro Tololo Inter-American Observatory.^[16] Carnegie's 6.5-meter Magellan telescope at Las Campanas Observatory in Chile was used to determine its orbit and surface properties.^[16] Before being announced to the public, it was only tracked by Cerro Tololo Inter-American Observatory (807) and Las Campanas Observatory (304).^[1] Two precovery measurements from 22 October 2011 have been reported.^[1] A primary issue with observing it and finding precovery observations of it is that at an apparent magnitude of 23, it is too faint for most telescopes to easily observe.

Nickname

2012 VP₁₁₃ was abbreviated "VP" and nicknamed "Biden" by the discovery team, after Joe Biden who was the vice president ("VP") of the United States in 2012.^[12]

Orbit

2012 VP₁₁₃ has the largest perihelion distance of any known object in the Solar System.^[17] Its last perihelion was within a couple months of September 1979.^[5] The paucity of bodies with perihelia at 50–75 AU appears not to be an observational artifact.^[10]

It is possibly a member of a hypothesized Hills cloud.^[8]^[16]^[18] It has a perihelion, argument of perihelion, and current position in the sky similar to those of Sedna.^[8] In fact, all known Solar System bodies with semi-major axes over 150 AU and perihelia greater than Neptune's have arguments of perihelion clustered near 340°±55°.^[10] This could indicate a similar formation mechanism for these bodies.^[10] (148209) 2000 CR105 was the first such object discovered.

It is currently unknown how 2012 VP₁₁₃ acquired a perihelion distance beyond the Kuiper belt. The characteristics of its orbit, like those of Sedna's, have been explained as possibly created by a passing star or a trans-Neptunian planet of several Earth masses hundreds of astronomical units from the Sun.^[19] The orbital architecture of the trans-Plutonian region may signal the presence of more than one planet.^[20]^[21] 2012 VP₁₁₃ could even be captured from another planetary system.^[14] However, it is considered more likely that the perihelion of 2012 VP₁₁₃ was raised by multiple interactions within the crowded confines of the open star cluster in which the Sun formed.^[8]

Simulated view showing the orbit of 2012 VP₁₁₃
2012 VP113 orbit in white with hypothetical Planet Nine
The orbits of known distant objects with large aphelion distances over 200 AU

References

^ ^a ^b ^c ^d ^e "2012 VP113". Minor Planet Center. Retrieved 14 November 2018.
^ ^a ^b ^c "MPEC 2014-F40 : 2012 VP113". IAU Minor Planet Center. 26 March 2014. (K12VB3P)
^ ^a ^b ^c "JPL Small-Body Database Browser: (2012 VP113)" (3 December 2021 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2022.
^ ^a ^b Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 14 November 2018.
^ ^a ^b ^c "Horizons Batch for 2012 VP113 on 1979-Sep-28" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 21 June 2022. (JPL#9, Soln.date: 3 December 2021)
^ Horizons output. "Barycentric Osculating Orbital Elements for 2012 VP113". Retrieved 21 June 2022. (Ephemeris Type:Elements and Center:@0)
^ "List of known trans-Neptunian objects".
^ ^a ^b ^c ^d ^e Lakdawalla, Emily (26 March 2014). "A second Sedna! What does it mean?". Planetary Society blogs. The Planetary Society.
^ Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 14 November 2018.
^ ^a ^b ^c ^d ^e ^f ^g ^h Trujillo, C. A.; Sheppard, S. S. (2014). "A Sedna-like body with a perihelion of 80 astronomical units" (PDF). Nature. 507 (7493): 471–474. Bibcode:2014Natur.507..471T. doi:10.1038/nature13156. PMID 24670765. S2CID 4393431. Archived from the original (PDF) on 16 December 2014. Retrieved 29 August 2015.
^ "2012 VP113 – Summary". AstDyS-2, Asteroids – Dynamic Site. Retrieved 14 November 2018.
^ ^a ^b Witze, Alexandra (26 March 2014). "Dwarf planet stretches Solar System's edge". Nature. doi:10.1038/nature.2014.14921. S2CID 124305879.
^ Chang, Kenneth (26 March 2014). "A New Planetoid Reported in Far Reaches of Solar System". The New York Times.
^ ^a ^b Sheppard, Scott S. "Beyond the Edge of the Solar System: The Inner Oort Cloud Population". Department of Terrestrial Magnetism, Carnegie Institution for Science. Archived from the original on 30 March 2014. Retrieved 27 March 2014.
^ Sample, Ian (26 March 2014). "Dwarf planet discovery hints at a hidden Super Earth in solar system". The Guardian.
^ ^a ^b ^c "NASA Supported Research Helps Redefine Solar System's Edge". NASA. 26 March 2014. Retrieved 26 March 2014.
^ "JPL Small-Body Database Search Engine: q > 47 (AU)". JPL Solar System Dynamics. Retrieved 12 March 2018.
^ Wall, Mike (26 March 2014). "New Dwarf Planet Found at Solar System's Edge, Hints at Possible Faraway 'Planet X'". Space.com web site. TechMediaNetwork. Retrieved 27 March 2014.
^ "A new object at the edge of our Solar System discovered". Physorg.com. 26 March 2014.
^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 September 2014). "Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets". Monthly Notices of the Royal Astronomical Society: Letters. 443 (1): L59–L63. arXiv:1406.0715. Bibcode:2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084.
^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl; Aarseth, S. J. (11 January 2015). "Flipping minor bodies: what comet 96P/Machholz 1 can tell us about the orbital evolution of extreme trans-Neptunian objects and the production of near-Earth objects on retrograde orbits". Monthly Notices of the Royal Astronomical Society. 446 (2): 1867–1873. arXiv:1410.6307. Bibcode:2015MNRAS.446.1867D. doi:10.1093/mnras/stu2230.

External links

2012 VP113 Inner Oort Cloud Object Discovery Images from Scott S. Sheppard/Carnegie Institution for Science.
2012 VP113 has Q=460 ± 30 Archived 28 March 2016 at the Wayback Machine (mpml: CFHT 2011-Oct-22 precovery)
List of Known Trans-Neptunian Objects, Johnston's Archive
List Of Centaurs and Scattered-Disk Objects, Minor Planet Center
2012 VP113 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[MPC-object-1] "2012 VP113". Minor Planet Center. Retrieved 14 November 2018.

[MPEC2014-F40-2] "MPEC 2014-F40 : 2012 VP113". IAU Minor Planet Center. 26 March 2014. (K12VB3P)

[jpldata-3] "JPL Small-Body Database Browser: (2012 VP113)" (3 December 2021 last obs.). Jet Propulsion Laboratory. Retrieved 20 June 2022.

[johnstonsarchive-TNO-list-4] Johnston, Wm. Robert (7 October 2018). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 14 November 2018.

[Horizons1979-5] "Horizons Batch for 2012 VP113 on 1979-Sep-28" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 21 June 2022. (JPL#9, Soln.date: 3 December 2021)

[barycenter-6] Horizons output. "Barycentric Osculating Orbital Elements for 2012 VP113". Retrieved 21 June 2022. (Ephemeris Type:Elements and Center:@0)

[7] "List of known trans-Neptunian objects".

[Lakdawalla2014-8] Lakdawalla, Emily (26 March 2014). "A second Sedna! What does it mean?". Planetary Society blogs. The Planetary Society.

[Brown-dplist-9] Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 14 November 2018.

[nature_letter-10] ^ ^a ^b ^c ^d ^e ^f ^g ^h Trujillo, C. A.; Sheppard, S. S. (2014). "A Sedna-like body with a perihelion of 80 astronomical units" (PDF). Nature. 507 (7493): 471–474. Bibcode:2014Natur.507..471T. doi:10.1038/nature13156. PMID 24670765. S2CID 4393431. Archived from the original (PDF) on 16 December 2014. Retrieved 29 August 2015.

[AstDys-object-11] "2012 VP113 – Summary". AstDyS-2, Asteroids – Dynamic Site. Retrieved 14 November 2018.

[nature_news-12] Witze, Alexandra (26 March 2014). "Dwarf planet stretches Solar System's edge". Nature. doi:10.1038/nature.2014.14921. S2CID 124305879.

[NYT-20140326-13] Chang, Kenneth (26 March 2014). "A New Planetoid Reported in Far Reaches of Solar System". The New York Times.

[Sheppard-14] Sheppard, Scott S. "Beyond the Edge of the Solar System: The Inner Oort Cloud Population". Department of Terrestrial Magnetism, Carnegie Institution for Science. Archived from the original on 30 March 2014. Retrieved 27 March 2014.

[Guardian-15] Sample, Ian (26 March 2014). "Dwarf planet discovery hints at a hidden Super Earth in solar system". The Guardian.

[NASA_announcement-16] "NASA Supported Research Helps Redefine Solar System's Edge". NASA. 26 March 2014. Retrieved 26 March 2014.

[jpl-search-17] "JPL Small-Body Database Search Engine: q > 47 (AU)". JPL Solar System Dynamics. Retrieved 12 March 2018.

[Wall2014-18] Wall, Mike (26 March 2014). "New Dwarf Planet Found at Solar System's Edge, Hints at Possible Faraway 'Planet X'". Space.com web site. TechMediaNetwork. Retrieved 27 March 2014.

[phys.2014.edge-19] "A new object at the edge of our Solar System discovered". Physorg.com. 26 March 2014.

[Marcos2014-20] Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (1 September 2014). "Extreme trans-Neptunian objects and the Kozai mechanism: signalling the presence of trans-Plutonian planets". Monthly Notices of the Royal Astronomical Society: Letters. 443 (1): L59–L63. arXiv:1406.0715. Bibcode:2014MNRAS.443L..59D. doi:10.1093/mnrasl/slu084.

[Marcos2015-21] Fuente Marcos, Carlos; de la Fuente Marcos, Raúl; Aarseth, S. J. (11 January 2015). "Flipping minor bodies: what comet 96P/Machholz 1 can tell us about the orbital evolution of extreme trans-Neptunian objects and the production of near-Earth objects on retrograde orbits". Monthly Notices of the Royal Astronomical Society. 446 (2): 1867–1873. arXiv:1410.6307. Bibcode:2015MNRAS.446.1867D. doi:10.1093/mnras/stu2230.

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PROFILPELAJAR.COM

2012 VP113

Classification and physical characteristics

History

Discovery

Nickname

Orbit

See also

References

External links

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