Astronomy:Comet McNaught–Russell
| Discovery | |
|---|---|
| Discovered by | Robert H. McNaught Kenneth S. Russell |
| Discovery date | December 17, 1993 [1] |
| Alternative designations | 1994 XI 1993v |
| Orbital characteristics A | |
| Number of observations | 377 |
| Aphelion | 270 AU (inbound) 240 AU (outbound)[2] |
| Perihelion | 0.8676 AU |
| Eccentricity | 0.9932 |
| Orbital period | 1600 years (inbound) 1300 years (outbound)[2] 1430 ± 30 a |
| Inclination | 51.59° |
| Last perihelion | March 31, 1994 |
Comet C/1993 Y1 (McNaught–Russell) is a long (time) period comet that reached a maximum magnitude of 6.5 (just below naked eye level) in early 1994. It was discovered by Robert H. McNaught and Kenneth S. Russell using the U.K. Schmidt Telescope in Australia. McNaught and Russell worked at Siding Spring Observatory and together discovered five comets between 1991 and 1995.
Orbit
Its orbital period was found to be very high – initially estimated at over 1400 years.
Historical records
It was noted by Francois Colas (Paris observatory) [3] and Ichiro Hasegawa [4] that the path of the comet coincided with a comet C/574 G1 recorded in AD 574 over a period from April 4 to May 23 by observers in China. This would give the comet a period of 1430 ± 30 years and so making it the longest period comet to be seen on two separate returns. Since the comet was not observed to approach any planets, its orbit should remain largely unchanged on its next return. This would place its next approach to the inner Solar System around 3300.
References
- ↑ IAUC 5910
- ↑ 2.0 2.1 Horizons output. "Barycentric Osculating Orbital Elements for Comet McNaught-Russell (C/1993 Y1)". https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%271993+Y1%27&TABLE_TYPE=%27ELEMENTS%27&START_TIME=%271800-01-01%27&STOP_TIME=%272200-01-01%27&STEP_SIZE=%27400%20years%27&CENTER=%27@0%27&OUT_UNITS=%27AU-D%27. Retrieved 2023-08-25. (Solution using the Solar System's barycenter (Sun+Jupiter). Select Ephemeris Type:Elements and Center:@0)
- ↑ Guinness Book of Astronomy, (1995), Guinness Publishing, London
- ↑ IAUC 5943
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