Global Information7066 Nessus information
 Hubble Space Telescope image of Nessus taken in 2009 | |
| Discovery[1] | |
|---|---|
| Discovered by | Spacewatch (D. Rabinowitz uncredited)[2] |
| Discovery site | Kitt Peak National Obs. |
| Discovery date | 26 April 1993 |
| Designations | |
MPC designation | (7066) Nessus |
| Pronunciation | /ˈnɛsəs/[3] |
Named after | Νέσσος Nessos (Greek mythology)[1] |
Alternative designations | 1993 HA2 |
Minor planet category | centaur [4][5][6] · distant [1] |
| Adjectives | Nessian /ˈnɛsiən/[7] |
| Symbol |  (astrological) |
| Orbital characteristics[4] | |
| Epoch 27 April 2019 (JD 2458600.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 11.08 yr (4,048 d) |
| Aphelion | 37.423 AU |
| Perihelion | 11.854 AU |
Semi-major axis | 24.639 AU |
| Eccentricity | 0.5189 |
Orbital period (sidereal) | 122.30 yr (44,670 d) |
Mean anomaly | 80.046° |
Mean motion | 0° 0m 29.16s / day |
| Inclination | 15.663° |
Longitude of ascending node | 31.183° |
Argument of perihelion | 170.96° |
| Jupiter MOID | 6.400 AU |
| TJupiter | 3.793 |
| Physical characteristics | |
Mean diameter | 57±17 km[8] 60±16 km[5][9] |
Geometric albedo | 0.065[5][9] 0.086[8] |
Spectral type | RR (very red)[10] B–V = 1.090±0.010[10] V–R = 0.790±0.010[10] V–I = 1.470±0.030[10] B–R = 1.847[11] |
Apparent magnitude | 24.31[12] |
Absolute magnitude (H) | 9.55[13][14] 9.6[1][4] |
7066 Nessus /ˈnɛsəs/ is a very red centaur on an eccentric orbit, located beyond Saturn in the outer Solar System. It was discovered on 26 April 1993, by astronomers of the Spacewatch program at the Kitt Peak National Observatory in Tucson, Arizona.[1] The dark and reddish minor planet is likely elongated and measures approximately 60 kilometers (37 miles) in diameter.[5][13] It was named after Nessus from Greek mythology.[1]
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