5335 Damocles
(5335) Damocles /ˈdæməkliːz/, provisional designation 1991 DA, is a centaur and the namesake of the damocloids, a group of minor planets which may be inactive nuclei of the Halley-type and long-period comets. It was discovered on 18 February 1991, by Australian astronomer Robert McNaught at Siding Spring Observatory in Australia. It is named after Damocles, a figure of Greek mythology.
Discovery | |
---|---|
Discovered by | R. H. McNaught |
Discovery site | Siding Spring Obs. |
Discovery date | 18 February 1991 |
Designations | |
MPC designation | (5335) Damocles |
Pronunciation | /ˈdæməkliːz/ |
Named after | Damocles (Greek mythology) |
Alternative designations | 1991 DA |
Minor planet category | distant centaur · damocloid |
Adjectives | Damoclean (/dæməˈkliːən/) |
Symbol | (astrological) |
Orbital characteristics | |
Epoch 4 September 2017 (JD 2458000.5) | |
Uncertainty parameter 4 | |
Observation arc | 1.51 yr (551 days) |
Aphelion | 22.078 AU |
Perihelion | 1.5741 AU |
Semi-major axis | 11.826 AU |
Eccentricity | 0.8669 |
Orbital period (sidereal) | 40.67 Jyr (14,854 days) |
Mean anomaly | 236.35° |
Mean motion | 0° 1m 27.12s / day |
Inclination | 61.875° |
Longitude of ascending node | 314.14° |
191.26° | |
Mars MOID | 0.05787 AU |
TJupiter | 1.149 |
Physical characteristics | |
Dimensions | ~ 10 km |
26.56 | |
13.3 | |
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