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What is comet Kohoutek?

Updated: 8/11/2023
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Comet Kohoutek, formally designated C/1973 E1, 1973 XII, and 1973f, was first sighted on 7 March 1973 by Czech astronomer Luboš Kohoutek. It attained perihelion on 28 December that same year.

Comet Kohoutek is a long-period comet; its previous apparition was about 150,000 years ago, and its next apparition will be in about 75,000 years.[1] At its apparition in 1973 it had a hyperbolic trajectory (e > 1) due to gravitational perturbations from giant planets. Due to its path, scientists theorized that Kohoutek was an Oort-cloud object. As such, it was believed likely that this was the comet's first visit to the inner Solar System, which would result in a spectacular display of outgassing. Infrared and visual telescopic study have led many scientists to conclude, in retrospect, that Kohoutek is actually a Kuiper-belt object, which would account for its apparent rocky makeup and lack of outgassing.[2]

Before its close approach, Kohoutek was hyped by the media as the "comet of the century". However, Kohoutek's display was considered a let-down[citation needed]. Although it failed to brighten to levels expected, it was still a naked-eye object. Its greatest visual magnitude was -3, when it was at perihelion, 0.14 AU from the Sun. Its orbital inclination is 14.3°. Its best viewing was in the night sky after perihelion, when it had dimmed to fourth magnitude. The comet also sported a tail up to 25° long, along with an anti-tail.

C/1973 E1 should not be confused with the periodic comet 75D/Kohoutek, which can also be called "Comet Kohoutek" (as could the comets C/1969 O1 and C/1973 D1, also discovered by Luboš Kohoutek as sole discoverer).

This comet was observed by the crew of Skylab 4 and Soyuz 13, thus becoming the first comet to be observed by a manned spacecraft.

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When is the comet kohoutek going to be seen?

The period of naked eye visibility for comet Kohoutek spanned the end of Nov. 1973 until late Jan. 1974. {That means if you knew where and when to look, you could see Kohoutek without a telescope.} Its orbit was found to be hyperbolic, meaning Kohoutek is on an escape course from the solar system, never to be sen again.


What is Kohoutek?

Comet Kohoutek, formally designated C/1973 E1, 1973 XII, and 1973f, was first sighted on 7 March 1973 by Czech astronomer Luboš Kohoutek. It attained perihelion on 28 December that same year.Comet Kohoutek is a long-period comet; its previous apparition was about 150,000 years ago, and its next apparition will be in about 75,000 years.[1] At its apparition in 1973 it had a hyperbolic trajectory (e > 1) due to gravitational perturbations from giant planets. Due to its path, scientists theorized that Kohoutek was an Oort-cloud object. As such, it was believed likely that this was the comet's first visit to the inner Solar System, which would result in a spectacular display of outgassing. Infrared and visual telescopic study have led many scientists to conclude, in retrospect, that Kohoutek is actually a Kuiper-belt object, which would account for its apparent rocky makeup and lack of outgassing.[2]Before its close approach, Kohoutek was hyped by the media as the "comet of the century". However, Kohoutek's display was considered a let-down[citation needed]. Although it failed to brighten to levels expected, it was still a naked-eye object. Its greatest visual magnitude was -3, when it was at perihelion, 0.14 AU from the Sun. Its orbital inclination is 14.3°. Its best viewing was in the night sky after perihelion, when it had dimmed to fourth magnitude. The comet also sported a tail up to 25° long, along with an anti-tail.C/1973 E1 should not be confused with the periodic comet 75D/Kohoutek, which can also be called "Comet Kohoutek" (as could the comets C/1969 O1 and C/1973 D1, also discovered by Luboš Kohoutek as sole discoverer).This comet was observed by the crew of Skylab 4 and Soyuz 13, thus becoming the first comet to be observed by a manned spacecraft.


When is Haily's comet passing over?

It will be back again in 2061. The 1986 flyby was a bit of a disappointment. Comet Kohoutek in 1973 was much better, but it won't be back for another 75,000 years.


When did Ctirad Kohoutek die?

Ctirad Kohoutek died in 2011.


When was Ctirad Kohoutek born?

Ctirad Kohoutek was born in 1929.


When was Luboš Kohoutek born?

Luboš Kohoutek was born in 1935.


What object in 2013 will people be looking at the skies for?

One object that's currently getting a LOT of attention is the newly discovered Comet ISON, which will make a VERY close pass near the Sun in October, 2013. If Comet ISON survives the encounter - a VERY big "IF"! - then it will probably pass not too far from the Earth and become one of the most impressive comets of the last 300 years. No guarantees, of course, since this is probably Comet ISON's first pass near the Sun; we have no idea what quantity of volatile chemicals and frozen gasses may be in the comet. If it turns out to be mostly rocky, then this could be a bigger flop than Comet Kohoutek.