en 2010 FX86

2010 FX₈₆
Discovery
Discovered by	Observers S. S. Sheppard, A. Udalski, I. Soszynski
Discovery site	Las Campanas Observatory, Chile
Discovery date	17 March 2010
Designations
MPC designation	2010 FX86
Minor planet category	TNO; distant
Orbital characteristics
	Epoch 27 April 2019 (JD 2458600.5)
	Uncertainty parameter 3
Observation arc	2634 days (7.21 yr)
Aphelion	50.161 AU (7.5040 Tm)
Perihelion	44.109 AU (6.5986 Tm)
Semi-major axis	47.135 AU (7.0513 Tm)
Eccentricity	0.064199
Orbital period (sidereal)	323.61 yr (118199 d)
Mean anomaly	295.094°
Mean motion	0° 0m 10.965s /day
Inclination	25.1697°
Longitude of ascending node	311.074°
Time of perihelion	≈ 25 February 2084; ±44 days
Argument of perihelion	347.887°
Earth MOID	43.0966 AU (6.44716 Tm)
Jupiter MOID	39.0007 AU (5.83442 Tm)
Physical characteristics
Mean diameter	305–682 km; 549 km
Synodic rotation period	15.80 h (0.658 d)
Geometric albedo	0.09 (assumed)
Absolute magnitude (H)	4.7; 4.6

2010 FX₈₆, also written 2010 FX86, is a relatively bright trans-Neptunian object^[2] with an absolute magnitude of about 4.65.^[2]^[3]^[6]

It was first discovered on 17 March 2010, at Las Campanas Observatory in Chile, by S. S. Sheppard, A. Udalski and I. Soszynski. No earlier precovery images for it have been found. It is estimated to be about 520 kilometres (320 mi) in diameter,^[6] with a rotation period of approximately 15.80 hours,^[2] but as yet no detailed photometry has been taken to properly determine colour or albedo, or to better confirm its rotational lightcurve.

Notes

^ Using 4.6 mag, Bruton formula, and typical estimated albedo for minor planets of 0.25 to 0.05; mean is 493.5 km
^ estimated
^ "Result based on less than full coverage, so that the period may be wrong by 30 percent or so."

References

^ "MPEC 2010-G57 : 2010 FX86". Minorplanetcenter.org. Retrieved 13 June 2014.
^ ^a ^b ^c ^d ^e ^f ^g ^h Alan Chamberlin. "JPL Small-Body Database Browser". Ssd.jpl.nasa.gov. Retrieved 19 August 2019.
^ ^a ^b ^c ^d "IAU Minor Planet Center". Minorplanetcenter.net. 23 March 2018. Retrieved 19 August 2019.
^ JPL Horizons Observer Location: @sun (Perihelion occurs when deldot changes from negative to positive. Uncertainty in time of perihelion is 3-sigma.)
^ Dan Bruton. "Conversion of Absolute Magnitude to Diameter for Minor Planets". Stephen F. Austin State University, College of Sciences and Mathematics, Department of Physics, Engineering and Astronomy. Archived from the original on 23 July 2011. Retrieved 15 August 2019.
^ ^a ^b ^c ^d ^e Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Archived from the original on 31 May 2019. Retrieved 19 August 2019.