C/2017 O1 (ASASSN)
< C
The comet's perihelion is just outside of the orbit of Mars on October 14, 2017. | |
| Discovery | |
|---|---|
| Discovered by | All Sky Automated Survey for SuperNovae |
| Discovery site | Cerro Tololo, Chile |
| Discovery date | 19 July 2017 |
| Designations | |
| ASASSN1 CK17O010 | |
| Orbital characteristics | |
| Epoch | 13 October 2017 (JD 2458039.5) |
| Observation arc | 601 days (1.65 years) |
| Number of observations | 2,877 |
| Aphelion | 837.04 AU |
| Perihelion | 1.4987 AU |
| Semi-major axis | 419.27 AU |
| Eccentricity | 0.99642 |
| Orbital period | ~8600 yr (inbound) ~8200 yr (outbound) |
| Inclination | 39.849° |
| 25.810° | |
| Argument of periapsis | 20.907° |
| Last perihelion | 14 October 2017 |
| TJupiter | 1.177 |
| Earth MOID | 0.5348 AU |
| Jupiter MOID | 2.2744 AU |
| Physical characteristics | |
Mean radius | 0.919±0.092 km |
Mean density | 450±70 kg/m3 |
| Comet total magnitude (M1) | 12.4 |
C/2017 O1 (ASASSN) is a comet discovered by the All Sky Automated Survey for SuperNovae (ASAS-SN). It was first detected on July 19, 2017, located in the southern constellation Cetus.