 | |
| Discovery | |
|---|---|
| Discovered by | James E. Gunn |
| Discovery date | October 17, 1970 |
| Designations | |
| 1969 II; 1976 III; 1982 X; 1989 XI; | |
| Orbital characteristics | |
| Epoch | March 6, 2006 |
| Aphelion | 4.737 AU |
| Perihelion | 2.444 AU |
| Semi-major axis | 3.59 AU |
| Eccentricity | 0.3194 |
| Orbital period | 6.803 a |
| Inclination | 10.3867° |
| Last perihelion | October 16, 2017[1] March 2, 2010 May 11, 2003 |
| Next perihelion | 2025-Jun-16[2] |
65P/Gunn is a periodic comet in the Solar System which has a current orbital period of 6.79 years. The comet is a short-period comet, orbiting the Sun every 6.79 years inside the main asteroid belt between the orbits of the planets Mars and Jupiter.[3]
It was discovered on 11 October 1970 by Professor James E. Gunn of Princeton University using the 122-cm Schmidt telescope at the Palomar Observatory. It had a low brightness of magnitude 16 plus which improves to 12 under favourable conditions. In 1972 Elizabeth Roemer managed to observe 65P/Gunn close to aphelion.[4]
On 4 February 1970 the comet passed 0.015 AU (2,200,000 km; 1,400,000 mi) from Ceres.[5]
In 1980 was noticed that a 19th magnitude comet found in plates obtained by Palomar Observatory on 8 August 1954[6] was a previous apparition of 65/Gunn. The link was confirmed by Brian G. Marsden.[7]
See also
[edit]References
[edit]- ^ Syuichi Nakano (2010-06-19). "65P/Gunn (NK 1941)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
- ^ MPC
- ^ "WISE Catches Comet 65P/Gunn". Jet Propulsion Laboratory. Retrieved 26 November 2014.
- ^ Marsden, B.G (December 1973). "Comets in 1972". Quarterly Journal of the Royal Astronomical Society. 14: 390–391. Bibcode:1973QJRAS..14..389M. Retrieved 2 September 2020.
- ^ "JPL Close-Approach Data: 65P/Gunn" (2012-1-25 last obs). Retrieved 2012-02-23.
- ^ Green, Daniel (17 November 1980). "IAUC 3540: AG Dra; COMET ON PSS; (1865); 1980h". www.cbat.eps.harvard.edu. International Astronomical Union Circular. Retrieved 20 April 2023.
- ^ Marsden, Brian (31 March 1981). "IAUC 3588: P/GUNN; 1981 CW". International Astronomical Union Circular. Retrieved 20 April 2023.
External links
[edit]- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 65P at Kronk's Cometography
- 65P/Gunn – Seiichi Yoshida @ aerith.net
- 65P at Las Cumbres Observatory (26 Jun 2010 11:16, 150 seconds)
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction