(19255) 1994 VK8

(19255) 1994 VK₈
Discovery
Discovered by	A. Fitzsimmons; D. O'Ceallaigh; I. P. Williams
Discovery site	Roque de los Muchachos Obs.
Discovery date	8 November 1994
Designations
MPC designation	(19255) 1994 VK8
Alternative designations	none
Minor planet category	cubewano; (cold)
Orbital characteristics
	Epoch 13 January 2016 (JD 2457400.5)
	Uncertainty parameter 4
Observation arc	7347 days (20.11 yr)
Aphelion	44.40611 AU (6.643060 Tm)
Perihelion	41.34116 AU (6.184550 Tm)
Semi-major axis	42.87364 AU (6.413805 Tm)
Eccentricity	0.035744
Orbital period (sidereal)	280.73 yr (102538 d)
Average orbital speed	4.56 km/s
Mean anomaly	267.925°
Mean motion	0° 0m 12.639s / day
Inclination	1.48856°
Longitude of ascending node	72.3924°
Argument of perihelion	112.111°
TJupiter	5.857
Physical characteristics
Dimensions	175 km
Mass	5.6×1018 kg
Mean density	2.0 g/cm3
Equatorial surface gravity	0.0489 m/s2
Equatorial escape velocity	0.0925 km/s
Synodic rotation period	9 h (0.38 d)
Geometric albedo	0.09 (assumed)
Temperature	~43 K
Spectral type	?
Absolute magnitude (H)	7.0

(19255) 1994 VK₈ is a trans-Neptunian object (TNO) of the "cold" cubewano class orbiting the Sun in the Kuiper belt of the outer Solar System. It was discovered on November 8, 1994, by Alan Fitzsimmons, Donal O'Ceallaigh, and Iwan P. Williams at Roque de los Muchachos Observatory on the island of La Palma, Spain.

(19255) 1994 VK₈ is the fourth cubewano to be given an official Minor Planet Center catalog number.^[5] The first three official cubewanos are 15760 Albion, (15807) 1994 GV9, and (16684) 1994 JQ1.

References

^ ^a ^b ^c ^d "JPL Small-Body Database Browser: 19255 (1994 VK8)" (2000-11-27 last obs). Retrieved 8 April 2016.
^ Marc W. Buie (1997-10-27). "Orbit Fit and Astrometric record for 19255". SwRI (Space Science Department). Retrieved 2008-09-29.
^ ^a ^b Wm. Robert Johnston (22 August 2008). "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 28 September 2008. Retrieved 2008-09-29.
^ Brown, Mike. "How many dwarf planets are there in the Solar System". Retrieved 2018-02-17.
^ "MPEC 2008-O05 : Distant Minor Planets (2008 AUG. 2.0 TT)". Minor Planet Center. 2008-07-17. Archived from the original on 7 December 2008. Retrieved 2008-09-29.

v t e Trans-Neptunian objects
TNO classes	Cubewanos Scattered-disc objects Detached objects Resonant objects Neptune trojans Plutinos Twotinos TNO moons
Dwarf planets (moons)	Orcus Vanth Pluto Charon Styx Nix Kerberos Hydra Haumea Namaka Hiʻiaka Ring Quaoar Weywot Rings Makemake MK2 Gonggong Xiangliu Eris Dysnomia Sedna
Sednoids	90377 Sedna 2012 VP113 541132 Leleākūhonua

Discovery^[1]
Discovered by	A. Fitzsimmons D. O'Ceallaigh I. P. Williams
Discovery site	Roque de los Muchachos Obs.
Discovery date	8 November 1994
Designations
MPC designation	(19255) 1994 VK₈
Alternative designations	none
Minor planet category	cubewano^[2]^[3] (cold)^[4]
Orbital characteristics^[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 4
Observation arc	7347 days (20.11 yr)
Aphelion	44.40611 AU (6.643060 Tm)
Perihelion	41.34116 AU (6.184550 Tm)
Semi-major axis	42.87364 AU (6.413805 Tm)
Eccentricity	0.035744
Orbital period (sidereal)	280.73 yr (102538 d)
Average orbital speed	4.56 km/s
Mean anomaly	267.925°
Mean motion	0° 0^m 12.639^s / day
Inclination	1.48856°
Longitude of ascending node	72.3924°
Argument of perihelion	112.111°
T_Jupiter	5.857
Physical characteristics
Dimensions	175 km^[3]
Mass	5.6×10¹⁸ kg
Mean density	2.0 g/cm³
Equatorial surface gravity	0.0489 m/s²
Equatorial escape velocity	0.0925 km/s
Synodic rotation period	9 h (0.38 d)^[1]
Geometric albedo	0.09 (assumed)
Temperature	~43 K
Spectral type	?
Absolute magnitude (H)	7.0^[1]