Comet West facts for kids
| Discovery | |
|---|---|
| Discovered by | Richard Martin West |
| Discovery date | August 10, 1975 |
| Designations | |
| C/1975 V1, 1976 VI, 1975n | |
| Orbital characteristics | |
| Epoch | 2442840,5 |
| Aphelion | 13560 AU |
| Perihelion | 0.58 AU |
| Semi-major axis | 6.780,20 AU |
| Eccentricity | 0,99997 |
| Orbital period | 558306,4201 a |
| Inclination | 43,0664° |
| Last perihelion | February 25, 1976 |
| Next perihelion | 560.282 |
Comet West was a spectacular comet, also considered to qualify for great comet status.
It was discovered through pictures by Richard M. West, of the European Southern Observatory, on August 10, 1975. During peak brightness, observers reported that it was bright enough to study during full daylight.
Despite its spectacular appearance, Comet West went largely unreported in the popular media. This was partly due to the relatively disappointing display of Comet Kohoutek in 1973, which had been widely predicted to become extremely prominent: scientists were wary of making predictions that might raise public expectations.
With a nearly parabolic trajectory, estimates for the orbital period of this comet have varied from 254,000 to 558,000 years, and even as high as 6.5 million years.
Break up
During the comet's run into the closer part of the solar system for the first time in 500,000 years, the nucleus of Comet West was seen to split into four pieces as it passed within 30 million km. of the sun.
The first report of the split came around 7 March 1976 12:30UT, when reports were received that the comet had broken into two pieces. These two pieces remained the only pieces until Steven O'Meara, using the 9-inch Harvard Refractor, reported that two additional pieces had formed on the morning of 18 March.
The breakup was one of very few comet breakups seen from historical times by the 1970s. Recently, comets Shoemaker-Levy 9, Schwassmann-Wachmann-3 (73/P), C/1999 S4 LINEAR, and 57/P du Toit-Neujmin-Delporte, have been seen to disintegrate. When seen, many were stunned, but none more so than the discoverer, Richard Martin West. The comet broke into pieces when some distance from the sun. It exploded into four pieces, and those were scattered. Later, two pieces were spotted, and studied intently by astronomers.
Images for kids
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Animation of C／1975 V1 orbit around Sun C/1975 V1 · Sun · Mercury · Venus · Earth · Mars
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Sky path for Comet West, with 7 day motion. The retrograde loops are caused by parallax from Earth's annual motion around the Sun. The most movement occurs when the comet is closest to Earth.
See also
In Spanish: Cometa West para niños
