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(309239) 2007 RW10

Minor planet and quasi-satellite of Neptune

Field	Value
minorplanet	yes
background	#C2E0FF
name
discoverer	PDSSS
discovered	9 September 2007
mp_category	TNONept. co-orbital
centaurdistant
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
semimajor	30.17878 AU
perihelion	21.06436 AU
aphelion	39.28320 AU
eccentricity	0.30201
period	165.79 yr (60555.1 d)
inclination	36.15744°
asc_node	187.06355°
arg_peri	95.64947°
mean_anomaly	71.52911°
satellites	0
dimensions
abs_magnitude	6.6
albedo
mean_motion	/ day
observation_arc	10693 days (29.28 yr)
uncertainty	2
moid	20.2499 AU
jupiter_moid	17.1323 AU
tisserand	3.880

centaurdistant

**** (provisional designation ****) is a temporary quasi-satellite of Neptune. Observed from Neptune, it would appear to revolve around it over one Neptunian year but in reality, it orbits the Sun, not Neptune.

Discovery, orbit and physical properties

was discovered by the Palomar Distant Solar System Survey on September 9, 2007,{{cite web |title= Discovery MPEC |url=https://www.minorplanetcenter.net/mpec/K07/K07X06.html |display-authors=etal |doi-access=free the Minor Planet Center includes the object among centaurs. It moves in an orbit with an inclination of 36.2°, a semi-major axis of 30.18 AU, and an eccentricity of 0.3020.{{cite web

Quasi-satellite dynamical state and orbital evolution

is currently following a quasi-satellite loop around Neptune. It has been a quasi-satellite of Neptune for about 12,500 years and it will remain in that dynamical state for around another 12,500 years. Prior to the quasi-satellite dynamical state, was an trojan and it will return to this state soon after leaving its current quasi-satellite orbit. Its orbital inclination is the largest among known Neptune co-orbitals. It is also possibly the largest known object trapped in the 1:1 mean-motion resonance with any major planet.

Origin

is a dynamically hot (both high eccentricity and inclination) object that is unlikely to be a primordial Neptune co-orbital. It probably originated well beyond Neptune and was later temporarily captured in the 1:1 resonance with Neptune.

References

Santos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). [https://arxiv.org/abs/1202.1481 "TNOs are Cool": A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with ''Herschel'' Space Observatory-PACS]
"(309239) = 2007 RW10".
"Distant EKOs, 55".
"Distant EKOs 56".
Minor Planet Center [http://cfa-www.harvard.edu/iau/lists/NeptuneTrojans.html List Of Neptune Trojans] (2007-12-01)
(2012). "(309239) 2007 RW10: a large temporary quasi-satellite of Neptune". Astronomy and Astrophysics Letters.
(2012). "2008 LC18: a potentially unstable Neptune Trojan". Monthly Notices of the Royal Astronomical Society.

Info: Wikipedia Source

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