C/1993 Y1 (McNaught–Russell)
< C
| Discovery | |
|---|---|
| Discovered by | Robert H. McNaught Kenneth S. Russell |
| Discovery site | Siding Spring Observatory |
| Discovery date | 17 December 1993 |
| Designations | |
| C/1993 Y1 C/574 G1 | |
| 1994 XI 1993v | |
| Orbital characteristics | |
| Epoch | 28 April 1994 (JD 2449470.5) |
| Observation arc | 265 days |
| Number of observations | 377 |
| Aphelion | 270 AU (inbound) 240 AU (outbound) |
| Perihelion | 0.8676 AU |
| Eccentricity | 0.9932 |
| Orbital period | 1,600 years (inbound) 1,300 years (outbound) 1,430 ± 30 a |
| Inclination | 51.586° |
| 166.359° | |
| Argument of periapsis | 353.468° |
| Last perihelion | 31 March 1994 |
| Next perihelion | ~3300 |
| TJupiter | 0.755 |
| Earth MOID | 0.1212 AU |
| Jupiter MOID | 2.6212 AU |
| Physical characteristics | |
Mean radius | 0.75±0.02 km |
| Mass | 7.1×1011 kg |
Mean density | 480±60 kg/m3 |
| Comet total magnitude (M1) | 12.3 |
| Comet nuclear magnitude (M2) | 16.9 |
| 6.5 (1994 apparition) | |
Comet McNaught–Russell, formally designated as C/1993 Y1, is a long-period comet that reached a maximum magnitude of 6.5 (just below naked eye level) in early 1994. It was discovered by Robert H. McNaught and Kenneth S. Russell using the UK Schmidt Telescope in Australia. McNaught and Russell worked at Siding Spring Observatory and together discovered five comets between 1991 and 1995.