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Discovery[1]
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|---|---|
| Discovered by | NEAT |
| Discovery date | April 13, 2004 |
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Designations
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| MPC designation | (90568) 2004 GV9 |
| Alternate name(s) | none |
| Minor planet category |
Cubewano (MPC)[2] Extended (DES)[3] |
| Epoch January 30, 2005 (JD2453400.5) | |
| Aphelion | 45.7403 AU |
| Perihelion | 38.7336 AU |
| Semi-major axis | 42.2369 AU |
| Eccentricity | 0.0830 |
| Orbital period | 274.5028 y |
| Mean anomaly | 20.3717 ° |
| Inclination | 21.9702 ° |
| Longitude of ascending node | 250.6281 ° |
| Argument of perihelion | 292.9643 ° |
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Physical characteristics
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| Dimensions | 677±70 km[5] |
| Mass | 1.1–5.0×1020 kg[6] |
| Mean density | ? g/cm3 |
| Equatorial surface gravity | ? m/s2 |
| Escape velocity | ? km/s |
| Sidereal rotation period |
? d |
| Albedo | 0.08±0.02[5] |
| Temperature | ~? K |
| Spectral type | B-V=0.95, V-R=0.52[7] B0-V0=0.843[8] |
| Apparent magnitude | 19.9[9] |
| Absolute magnitude (H) | 3.9[4] |
(90568) 2004 GV9 (also written (90568) 2004 GV9) is a trans-Neptunian object. It was discovered on April 13, 2004 by NEAT.[1] It is currently listed as a cubewano by the Minor Planet Center.[2]
It is very likely a dwarf planet. The Spitzer Space Telescope has estimated it to have a diameter of 677±70 km.[5] Light-curve-amplitude analysis shows only small deviations, suggesting that 2004 GV9 is a spheroid with small albedo spots and hence a dwarf planet.[10]
It has been observed 47 times with precovery images back to 1954.[4]
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