C/1957 P1 (Mrkos)
< C
Comet Mrkos photographed from the Palomar Observatory on 25 August 1957 | |
| Discovery | |
|---|---|
| Discovered by | Antonín Mrkos |
| Discovery site | Lomnický štít, Czechoslovakia |
| Discovery date | 29 July 1957 |
| Designations | |
| 1957 V, 1957e | |
| Orbital characteristics | |
| Epoch | 10 March 1958 (JD 2436272.5) |
| Observation arc | 312 days |
| Number of observations | 16 |
| Aphelion | ~980 AU (inbound) ~640 AU (outbound) |
| Perihelion | 0.355 AU |
| Semi-major axis | ~540 AU |
| Eccentricity | 0.99934 |
| Orbital period | ~10,900 years (inbound) ~5,750 years (outbound) |
| Inclination | 93.957° |
| 68.324° | |
| Argument of periapsis | 40.319° |
| Mean anomaly | 0.018° |
| Last perihelion | 1 August 1957 |
| TJupiter | –0.041 |
| Earth MOID | 0.521 AU |
| Jupiter MOID | 0.979 AU |
| Physical characteristics | |
Mean diameter | ~24.0 km (14.9 mi) |
| Comet total magnitude (M1) | 4.0 |
| Comet nuclear magnitude (M2) | 12.2 |
| 1.0 (1957 apparition) | |
Comet Mrkos, formally known as C/1957 P1 (old style 1957d), was a non-periodic comet discovered in 1957 by Antonín Mrkos. It was one of two bright comets that had their perihelion in 1957, the other being Comet Arend–Roland. Its peak magnitude was estimated to be around 1.0 and it has been characterised as a great comet.