 | |
| Discovery | |
|---|---|
| Discovered by | Henry L. Giclas |
| Discovery date | September 8, 1978 |
| Designations | |
| 1931 R1; 1978 R2; 1978 XXII; 1978k; 1985 M1; 1985 XV; 1985g; 1992 XXV | |
| Orbital characteristics | |
| Epoch | March 6, 2006 |
| Aphelion | 5.443 AU |
| Perihelion | 1.852 AU |
| Semi-major axis | 3.647 AU |
| Eccentricity | 0.4923 |
| Orbital period | 6.965 a |
| Inclination | 7.2810° |
| Last perihelion | June 3, 2020[1] July 23, 2013[2] August 7, 2006 |
| Next perihelion | 2027-Feb-12[3] |
84P/Giclas is a periodic comet in the Solar System. The comet nucleus is estimated to be 1.8 kilometers in diameter.[4] In 1995 precovery images from three nights in September 1931 by Clyde W. Tombaugh were located.[5]
During the 2020 apparition it was not more than 60 degrees from the Sun until September 2020.
On 11 June 2033 the comet will pass 0.0387 AU (5,790,000 km; 3,600,000 mi) from the asteroid 4 Vesta.[6]
The nucleus of the comet has a radius of 0.90 ± 0.05 kilometers, assuming a geometric albedo of 0.04.[7]
References[edit]
- ^ "84P/Giclas Orbit". Minor Planet Center. Retrieved 2014-06-16.
- ^ Syuichi Nakano (2010-04-09). "84P/Giclas (NK 1911)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
- ^ "Horizons Batch for 84P/Giclas (90000868) on 2027-Feb-12" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2022-06-19. (JPL#49 Soln.date: 2021-Mar-29)
- ^ "JPL Small-Body Database Browser: 84P/Giclas" (2021-03-18 last obs). Jet Propulsion Laboratory. Retrieved 2012-02-18.
- ^ Bouma, R. J. (1 May 1995). "Comet 84P/Giclas". International Astronomical Union Circular (6168): 4. ISSN 0081-0304.
- ^ "JPL Close-Approach Data: 84P/Giclas (Archived)" (2007-03-12 last obs). Archived from the original on 2012-12-13. Retrieved 2012-02-22.
{{cite web}}: CS1 maint: bot: original URL status unknown (link) - ^ Lamy, P. L.; Toth, I.; Weaver, H. A.; A'Hearn, M. F.; Jorda, L. (December 2009). "Properties of the nuclei and comae of 13 ecliptic comets from Hubble Space Telescope snapshot observations". Astronomy & Astrophysics. 508 (2): 1045–1056. Bibcode:2009A&A...508.1045L. doi:10.1051/0004-6361/200811462. S2CID 125249770.
External links[edit]
- 84P/Giclas – Seiichi Yoshida @ aerith.net
- 84P at Kronk's Cometography
- 84P/Giclas at the JPL Small-Body Database
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