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(527603) 2007 VJ₃₀₅
Discovery
Discovered by	A. C. Becker; A. W. Puckett; J. Kubica
Discovery site	Apache Point Obs.
Discovery date	4 November 2007
Designations
MPC designation	(527603) 2007 VJ305
Alternative designations	2007 VJ305
Minor planet category	TNO · ESDO; p-DP · ETNO; distant
Orbital characteristics
	Epoch 27 April 2019 (JD 2458600.5)
	Uncertainty parameter 2
Observation arc	17.19 yr (6,278 d)
Aphelion	346.97 AU
Perihelion	35.147 AU
Semi-major axis	191.06 AU
Eccentricity	0.8160
Orbital period (sidereal)	2640.9 yr (964,601 d)
Mean anomaly	1.8326°
Mean motion	0° 0m 1.44s / day
Inclination	11.993°
Longitude of ascending node	24.377°
Argument of perihelion	338.10°
Neptune MOID	5.4 AU
Physical characteristics
Mean diameter	202 km (est.); 279 km (est.)
Geometric albedo	0.04 (assumed); 0.09 (assumed)
Spectral type	IR; B–I = 1.960; B–R = 1.440; R–I = 0.520; V–R = 0.520
Absolute magnitude (H)	6.9

(527603) 2007 VJ₃₀₅ (provisional designation 2007 VJ₃₀₅) is an extreme trans-Neptunian object from the extended scattered disc on a highly eccentric orbit in the outermost region of the Solar System. It measures approximately 250 kilometers (160 miles) in diameter and is "possibly" a dwarf planet. The rather reddish extended scattered disc object belongs to the group of extreme trans-Neptunian objects. It was discovered on 4 November 2007 by astronomers Andrew Becker, Andrew Puckett and Jeremy Kubica at the Apache Point Observatory in New Mexico, United States.^[1]^[2]

Orbit and classification

2007 VJ₃₀₅ orbits the Sun at a distance of 35.1–347 AU once every 2640 years and 11 months (964,601 days; semi-major axis of 191.1 AU). Its orbit has an exceptionally high eccentricity of 0.82 and an inclination of 12° with respect to the ecliptic.^[3] The body's observation arc begins with a precovery taken during the Sloan Digital Sky Survey at Apache Point in November 2000.^[1] It has a minimum orbital intersection distance with Neptune of 5.4 AU.^[1]

It belongs to a small group of detached objects with perihelion distances of 30 AU or more, and semi-major axes of 150 AU or more.^[7] These extreme trans-Neptunian objects (ETNOs) can not reach such orbits without some perturbing object, which lead to the speculation of Planet Nine.

Numbering and naming

2007 VJ₃₀₅ was numbered by the Minor Planet Center on 18 May 2019 (M.P.C. 114650).^[8] As of 2019, it has not been named.^[1]

Physical characteristics

2007 VJ₃₀₅'s color is rather reddish with an intermediary IR spectral type and a B–R color index of 1.44.^[4]^[6]

Diameter and albedo

According to the Johnston's archive and to American astronomer Michael Brown, 2007 VJ₃₀₅ measures 202 and 279 kilometers in diameter based on an assumed albedo of 0.09 and 0.04, respectively.^[4]^[5] On his website, Michael Brown lists this object as "possibly" a dwarf planet (200–400 km) which is the least certain class in his 5-class taxonomic system.^[5]

Rotation period and shape

As of 2019, no rotational lightcurve of has been obtained from photometric observations. The body's rotation period, pole and shape remain unknown.^[3]^[9]