C/1989 Y2 (McKenzie–Russell)
| Discovery[1] | |
|---|---|
| Discovered by | Patricia McKenzie Kenneth S. Russell |
| Discovery site | Anglo-Australian Observatory |
| Discovery date | 21 December 1989 |
| Designations | |
| 1989f1[2] 1989 XVIII | |
| Orbital characteristics[3] | |
| Epoch | 30 December 1989 (JD 2447890.5) |
| Observation arc | 50 days |
| Earliest precovery date | 19 December 1989 |
| Number of observations | 45 |
| Perihelion | 1.976 AU |
| Eccentricity | 0.99999 |
| Inclination | 160.366° |
| 293.896° | |
| Argument of periapsis | 191.736° |
| Last perihelion | 7 November 1989 |
| TJupiter | –1.641 |
| Earth MOID | 0.9962 AU |
| Jupiter MOID | 1.4407 AU |
| Comet total magnitude (M1) | 10.0 |
Comet McKenzie–Russell, formally designated as C/1989 Y2, is a hyperbolic comet that was discovered by Australian astronomers, Patricia McKenzie and Kenneth S. Russell on December 1989.
Discovery and observations
[edit]Robert H. McNaught reported the discovery of a new comet that Patricia McKenzie found on photographic plates that Kenneth S. Russell took on 21 December 1989.[1] Prediscovery images from Japan were taken in 19 December 1989 but went unnoticed until the next year.[4] Orbital calculations of the comet revealed it was already on its outbound flight as it had reached perihelion a month before discovery, and as a result it continued to fade away in the following days.[5] It was last observed on 24 January 1990.[6]
References
[edit]- ^ a b B. G. Marsden (26 December 1989). "Comet McKenzie–Russell (1989f1)". Central Bureau for Astronomical Telegrams. 4930.
- ^ "Comet Names and Designations". International Comet Quarterly. Retrieved 16 December 2024.
- ^ "C/1989 Y2 (McKenzie–Russell) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 16 December 2024.
- ^ B. G. Marsden (4 January 1990). "Comet McKenzie–Russell (1989f1)". Central Bureau for Astronomical Telegrams. 4938. Bibcode:1990IAUC.4938....2S.
- ^ J. Svoren (1998). "Comet astrometry made at the Skalnate Pleso Observatory in the year 1990". Contributions of the Astronomical Observatory Skalnate Pleso Supplement. 28 (1): 73–81. Bibcode:1998CoSkS..28...73S.
- ^ "Observation list for C/1989 Y2". COBS – Comet OBServation database. Retrieved 16 December 2024.
External links
[edit]- C/1989 Y2 at the JPL Small-Body Database
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