Comet ISON
Comet ISON, formally known as C/2012 S1, was a sungrazing comet from the Oort cloud which was discovered on 21 September 2012 by Vitaly Nevsky (Віталь Неўскі, Vitebsk, Belarus) and Artyom Novichonok (Артём Новичонок, Kondopoga, Russia).
Comet ISON as captured by TRAPPIST on 15 November 2013 | |
| Discovery | |
|---|---|
| Discovered by | V. Nevsky A. Novichonok (at ISON-Kislovodsk D00) |
| Discovery date | 21 September 2012 |
| Orbital characteristics | |
| Epoch | 14 December 2013 (JD 2456640.5) |
| Observation arc | 2.15 years |
| Number of observations | 6682 |
| Orbit type | Oort cloud |
| Perihelion | 0.01244 AU (q) |
| Eccentricity | 1.000000086 (epoch 1950) 0.9999947 (near perihelion) 1.0002 (epoch 2050) |
| Orbital period | Ejection trajectory (epoch 2050) |
| Max. orbital speed | 337.3 km/s (755,000 mph) |
| Inclination | 62.4° |
| Last perihelion | 28 November 2013 |
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