40P/Väisälä
< 40P
Comet Väisälä 1 imaged from the Vega Observatory on March 18, 2004. | |
| Discovery | |
|---|---|
| Discovered by | Yrjö Väisälä |
| Discovery site | University of Turku, Finland |
| Discovery date | February 8, 1939 |
| Designations | |
| P/1939 CB P/1949 Y1 | |
| |
| Orbital characteristics | |
| Epoch | May 5, 2025 (JD 2460800.5) |
| Observation arc | 86.16 years |
| Earliest precovery date | January 18, 1939 |
| Number of observations | 1,243 |
| Aphelion | 8.079 AU |
| Perihelion | 1.824 AU |
| Semi-major axis | 4.951 AU |
| Eccentricity | 0.63169 |
| Orbital period | 11.018 years |
| Inclination | 11.539° |
| 128.90° | |
| Argument of periapsis | 52.029° |
| Mean anomaly | 342.92° |
| Last perihelion | November 15, 2014 |
| Next perihelion | November 12, 2025 |
| TJupiter | 2.535 |
| Earth MOID | 0.823 AU |
| Jupiter MOID | 0.077 AU |
| Physical characteristics | |
Mean diameter | 4.2 km (2.6 mi) |
| Comet total magnitude (M1) | 11.6 |
| Comet nuclear magnitude (M2) | 14.8 |
40P/Väisälä is a periodic comet that was discovered on February 8, 1939. Its orbit was determined on April 26, 1939. In 1994, the diameter of its nucleus was found to be 4.2 km (2.6 mi), similar in size to that of Comet Encke.