C/1921 H1 (Dubiago)
| Discovery[1] | |
|---|---|
| Discovered by | Alexander Dubyago |
| Discovery site | Kazan Observatory |
| Discovery date | 24 April 1921 |
| Designations | |
| 1921c[2] 1921 I | |
| Orbital characteristics[4] | |
| 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[3] (calculated) |
| Next perihelion | 25 June 2041[3] |
| TJupiter | 1.496 |
| Earth MOID | 0.384 AU |
| Jupiter MOID | 0.817 AU |
| Physical characteristics[5] | |
| 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.[5] It was predicted to return in 1982, but it was not observed. It will next return to the inner Solar System by 2041.[3]
Discovery and observations
The comet was first spotted from the Kazan Observatory on the evening of 24 April 1921.[5] Initially, the discovery of the comet was incorrectly credited to Dmitri Dubyago, but the attribution was later clarified to Alexander Dubyago a year later.[6][7]
References
- ^ G. Lecointe (20 May 1921). "Comète Dubiago (1921c)". Central Bureau for Astronomical Telegrams (in French). 20.
- ^ "Comet Names and Designations". International Comet Quarterly. Retrieved 25 December 2024.
- ^ a b c S. Yoshida (6 August 2006). "C/1921 H1 (Dubiago)". www.aerith.net. Retrieved 26 December 2024.
- ^ "C/1921 H1 (Dubiago) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 4 January 2024.
- ^ a b c G. W. Kronk (2003). "C/1921 H1 (Dubiago)". Cometography.com. Retrieved 20 September 2024.
- ^ "Report of the Comet Medal Committee". Publications of the Astronomical Society of the Pacific. 34 (197): 72. 1922. doi:10.1086/123250.
- ^ "Ninety-Eighth Award of the Donohue Comet Medal (A Correction)". Publications of the Astronomical Society of the Pacific. 34 (199): 163. 1922. doi:10.1086/123251.
External links
- C/1921 H1 at the JPL Small-Body Database
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