| Discovery | |
|---|---|
| Discovered by | Grigory Neujmin |
| Discovery date | August 2, 1929 |
| Designations | |
| 1929 III; 1; 1993 XVI | |
| Orbital characteristics | |
| Epoch | March 6, 2006 |
| Aphelion | 7.701 AU |
| Perihelion | 2.014 AU |
| Semi-major axis | 4.858 AU |
| Eccentricity | 0.5854 |
| Orbital period | 10.71 a |
| Inclination | 3.9854° |
| Last perihelion | April 8, 2015[1] July 15, 2004[1][2] |
| Next perihelion | January 14, 2026[1] |
42P/Neujmin, also known as Neujmin 3, is a periodic comet 2 km in diameter.
This comet and 53P/Van Biesbroeck are fragments of a parent comet that split in March 1845.[3][4][5]
The comet did not come within 1 AU of a planet in the 20th century, but will pass 0.04 AU from asteroid 4 Vesta on July 17, 2036.[6]
The comet nucleus is estimated to be 2.2 kilometers in diameter.[7]
References
[edit]- ^ a b c Seiichi Yoshida (2005-03-05). "42P/Neujmin 3". Seiichi Yoshida's Comet Catalog. Retrieved 2010-03-01.
- ^ Syuichi Nakano (2003-12-09). "42P/Neujmin 3 (NK 1018)". OAA Computing and Minor Planet Sections. Retrieved 2010-03-01.
- ^ "IAUC 3940: Sats OF SATURN; PERIODIC COMETS NEUJMIN 3 AND VAN BIESBROECK; Corrs". IAU Circular. 1984-04-25.
- ^ Comets II. Lunar and Planetary Institute, University of Arizona. p. 236, 237, 314.
- ^ Are Comets 42P/Neujmin 3 and 53P/Van Biesbroeck Parts of one Comet? Archived 2008-07-06 at the Wayback Machine
- ^ "JPL Close-Approach Data: 42P/Neujmin 3" (2004-11-07 last obs). Archived from the original on 2012-12-13. Retrieved 2012-12-13.
- ^ "JPL Small-Body Database Browser: 42P/Neujmin 3" (2004-11-07 last obs). Jet Propulsion Laboratory. Retrieved 2010-02-28.
External links
[edit]- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 42P at Kronk's Cometography
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