75D/Kohoutek is a short-period comet discovered in February 1975, by Luboš Kohoutek. Even on the discovery plate the comet was only apparent magnitude 14. Assuming the comet has not disintegrated the 2020-2021 perihelion passage is only expected to peak around apparent magnitude 20.
|Discovered by||Luboš Kohoutek, Hamburg-Bergedorf Observatory|
|Discovery date||February 1975|
|Orbital characteristics [ A]|
|Epoch||2014-07-02 (JD 2456840.5)|
|Semi-major axis||3.5 AU|
|Orbital period||~7 years|
|Last perihelion||July 2014(?)|
(last seen 1988)
|Next perihelion||Lost (March 2021?)|
Not to be confused with the much better-known C/1973 E1 (Kohoutek), 75D is a repeat visitor to the inner Solar System, with a period of about seven years. It was placed on the discovery orbit when it passed 0.143 AU (21,400,000 km; 13,300,000 mi) from Jupiter on 28 July 1972. Apparitions have been dim, with the brightest being in 1988 at about apparent magnitude 13. It was not seen in 1994, 2000, 2007, nor on its last predicted return in 2014. The comet has been estimated to be 4.6 kilometres (2.9 mi) in diameter.
This comet was last observed by Mauna Kea on 19 May 1988. The Minor Planet Center has given the comet a "D/" designation as the comet is believed to be lost. The comet is calculated to come to opposition in October 2020 in the constellation of Pisces.
- "75D/Kohoutek Orbit". Minor Planet Center. Retrieved 2014-10-30.
- Kronk, Gary W. "75P/Kohoutek". Cometography. Archived from the original on 2009-08-25. Retrieved 2014-10-30.
- "JPL Small-Body Database Browser: 75D/Kohoutek". Jet Propulsion Laboratory.
- "Cometary Designation System". Minor Planet Center. Retrieved 2015-06-17.