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Post Info TOPIC: Asteroid (83982) Crantor


L

Posts: 131433
Date:
Asteroid 83982 Crantor (2002 GO9)
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Asteroid 83982 Crantor (2002 GO9) is at Opposition (16.167) on the 14th July 2014

Ephemeris

Date    TT    R. A. (2000) Decl.     Delta      r     Elong.  Phase     Mag
2014 07 10    19 32 48.1 -20 16 28  16.1653 17.1790   175.6     0.3    21.1
2014 07 11    19 32 36.8 -20 17 05  16.1654 17.1801   176.5     0.2    21.1
2014 07 12    19 32 25.5 -20 17 42  16.1657 17.1812   177.4     0.2    21.1
2014 07 13    19 32 14.2 -20 18 19  16.1664 17.1824   178.1     0.1    21.1
2014 07 14    19 32 02.9 -20 18 57  16.1673 17.1835   178.6     0.1    21.1
2014 07 15    19 31 51.5 -20 19 34  16.1685 17.1846   178.4     0.1    21.1
2014 07 16    19 31 40.2 -20 20 11  16.1701 17.1857   177.7     0.1    21.1
2014 07 17    19 31 28.9 -20 20 48  16.1719 17.1868   176.9     0.2    21.1
2014 07 18    19 31 17.6 -20 21 25  16.1740 17.1879   176.0     0.2    21.1
2014 07 19    19 31 06.3 -20 22 03  16.1764 17.1890   175.0     0.3    21.1
2014 07 20    19 30 55.1 -20 22 40  16.1791 17.1901   174.0     0.4    21.1
2014 07 21    19 30 43.9 -20 23 17  16.1821 17.1912   173.1     0.4    21.1
2014 07 22    19 30 32.7 -20 23 54  16.1854 17.1924   172.1     0.5    21.1
2014 07 23    19 30 21.5 -20 24 31  16.1890 17.1935   171.1     0.5    21.1
2014 07 24    19 30 10.4 -20 25 08  16.1929 17.1946   170.1     0.6    21.1
2014 07 25    19 29 59.3 -20 25 45  16.1971 17.1957   169.1     0.6    21.1
2014 07 26    19 29 48.3 -20 26 22  16.2015 17.1968   168.1     0.7    21.1
2014 07 27    19 29 37.4 -20 26 59  16.2063 17.1979   167.1     0.8    21.2
2014 07 28    19 29 26.5 -20 27 36  16.2113 17.1990   166.2     0.8    21.2
2014 07 29    19 29 15.7 -20 28 12  16.2167 17.2001   165.2     0.9    21.2
2014 07 30    19 29 04.9 -20 28 49  16.2223 17.2012   164.2     0.9    21.2
2014 07 31    19 28 54.2 -20 29 25  16.2282 17.2024   163.2     1.0    21.2


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L

Posts: 131433
Date:
RE: Asteroid (83982) Crantor
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Three centaurs follow Uranus through the solar system

Astrophysicists from the Complutense University of Madrid have confirmed that Crantor, a large asteroid with a diameter of 70 km has an orbit similar to that of Uranus and takes the same amount of time to orbit the Sun. Researchers have demonstrated for the first time that this and a further two objects of the group of the Centaurs are co-orbital with Uranus." The researcher also reveals that they found another object, which has been named 2010 EU65 and moves in a similar orbit to Crantor's, "although much more stable because its trajectory is less eccentric."
Similarly, the latest data of a third asteroid, 2011 QF99 - the discovery of which was made public only a few weeks ago - also indicate that its orbit is in line with that of Uranus.

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L

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Title: Crantor, a short-lived horseshoe companion to Uranus
Authors: C. de la Fuente Marcos, R. de la Fuente Marcos

Stable co-orbital motion with Uranus is vulnerable to planetary migration but temporary co-orbitals may exist today. So far only two candidates have been suggested, both moving on horseshoe orbits: 83982 Crantor (2002 GO9) and 2000 SN331. (83982) Crantor is currently classified in the group of the Centaurs by the MPC although the value of its orbital period is close to that of Uranus. Here we revisit the topic of the possible 1:1 commensurability of (83982) Crantor with Uranus and also explore its dynamical past and look into its medium-term stability and future orbital evolution. (83982) Crantor currently moves inside Uranus' co-orbital region on a complex horseshoe orbit. The motion of this object is primarily driven by the influence of the Sun and Uranus, although Saturn plays a significant role in destabilizing its orbit. The precession of the nodes of (83982) Crantor, which is accelerated by Saturn, controls its evolution and short-term stability. Although this object follows a temporary horseshoe orbit, more stable trajectories are possible and we present 2010 EU65 as a long-term horseshoe librator candidate in urgent need of follow-up observations. Available data indicate that the candidate 2000 SN331 is not a Uranus' co-orbital.

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