C/1921 H1 (Dubiago)
< C
| Discovery | |
|---|---|
| Discovered by | Alexander Dubyago |
| Discovery site | Kazan Observatory |
| Discovery date | 24 April 1921 |
| Designations | |
| 1921c 1921 I | |
| Orbital characteristics | |
| Epoch | 21 May 1921 (JD 2422830.5) |
| Observation arc | 40 days |
| Number of observations | 27 |
| Aphelion | 33.088 AU |
| Perihelion | 1.1161 AU |
| Semi-major axis | 17.102 AU |
| Eccentricity | 0.93474 |
| Orbital period | 70.73 years |
| Inclination | 22.345° |
| 67.127° | |
| Argument of periapsis | 97.481° |
| Last perihelion | 5 May 1921 (last observation) 9 August 1982 (calculated) |
| Next perihelion | 25 June 2041 |
| TJupiter | 1.496 |
| Earth MOID | 0.384 AU |
| Jupiter MOID | 0.817 AU |
| Physical characteristics | |
| 10.5 (1921 apparition) | |
Dubiago's Comet, formally known as C/1921 H1 by its modern nomenclature, is a faint Halley-type comet that completes an orbit around the Sun once every 61–79 years. It was predicted to return in 1982, but it was not observed. It will next return to the inner Solar System by 2041.