Astronomy:(90568) 2004 GV9

(90568) 2004 GV₉

Hubble Space Telescope image of 2004 GV9, taken on March 2010
Discovery
Discovered by	NEAT
Discovery date	13 April 2004
Designations
MPC designation	2004 GV9
Minor planet category	Cubewano (MPC) Extended (DES)
Orbital characteristics
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc	22031 days (60.32 yr)
Earliest precovery date	21 December 1954
|{{{apsis}}}|helion}}	45.618 astronomical unit|AU (6.8244 Tm)
|{{{apsis}}}|helion}}	38.7281 AU (5.79364 Tm)
Semi-major axis	42.173 AU (6.3090 Tm)
Eccentricity	0.081681
Orbital period	273.88 yr (100034 d)
Mean anomaly	34.6030°
Mean motion	0° 0m 12.956s / day
Inclination	21.9718°
Longitude of ascending node	250.6142°
|{{{apsis}}}|helion}}	293.200°
Earth MOID	37.7917 AU (5.65356 Tm)
Jupiter MOID	33.6786 AU (5.03825 Tm)
Physical characteristics
Dimensions	680±34 km
Rotation period	5.86 h (0.244 d)
Sidereal rotation period	5.86 h
Geometric albedo	0.077+0.0084 −0.0077
Spectral type	BR B−V=0.95, V−R=0.52 B0−V0=0.843
Apparent magnitude	19.9
Absolute magnitude (H)	4.25±0.04 4.0

(90568) 2004 GV₉ (provisional designation 2004 GV₉) is a trans-Neptunian object that was discovered on April 13, 2004 by NEAT. It has been listed as a cubewano by the Minor Planet Center. It was discovered on 13 April 2004 by NEAT. It has been observed forty-seven times, with precovery images back to 1954. The object has an orbital period of 273.88 years. Its maximum possible distance from the Sun (aphelion) is 45.62 AU, and its closest (perihelion) is 38.7 AU, and currently 39.7 AU from the sun. It has an inclination of 21.9718, and eccentricity of 0.082.

M. E. Brown estimates that is very likely a dwarf planet. A diameter of 680±34 km has been determined from combined observations of the Herschel and Spitzer space telescopes. Tancredi notes that light-curve-amplitude analysis shows only small deviations, suggesting that (90568) 2004 GV₉ could be a spheroid with small albedo spots and hence a dwarf planet. However, its low albedo suggests it has never been resurfaced and thus is unlikely to have planetary geology.

External links

• (90568) 2004 GV9 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters