74P/Smirnova–Chernykh
| Discovery | |
|---|---|
| Discovered by | Tamara Mikhailovna Smirnova Nikolai Stepanovich Chernykh |
| Discovery date | March 4, 1975 |
| Designations | |
| 1967 XV; 1975 VII; 1984 V; 1992 XXI | |
| Orbital characteristics | |
| Epoch | November 21, 2025 |
| Aphelion | 5.39 AU |
| Perihelion | 4.836 AU |
| Semi-major axis | 5.11 AU |
| Eccentricity | 0.0543 |
| Orbital period | 11.56 yr |
| Inclination | 6.015° |
| Last perihelion | January 26, 2018[1] July 30, 2009[2][3] |
| Next perihelion | March 2, 2026[4] 2034-Jun-14[5] |
| Perihelion distance at different epochs[6] | |||||||
| Epoch | Perihelion (AU) | ||||||
|---|---|---|---|---|---|---|---|
| 1929 | 5.68 | ||||||
| 1967 | 3.55 | ||||||
| 2026 | 4.84 | ||||||
| 2034 | 3.84 | ||||||
74P/Smirnova–Chernykh is a periodic comet in the Solar System. It fits the definition of an Encke-type comet with (TJupiter > 3; a < aJupiter),[7] and is a Quasi-Hilda comet.[8] It was discovered in late March 1975 by Tamara Mikhajlovna Smirnova while examining exposures from the Crimean Astrophysical Observatory.[9] In the discovery images the comet had an apparent magnitude of ~15.[9] In the year of discovery, the comet came to perihelion on August 6, 1975.[9]
The comet had been photographed during 1967, but was identified as an asteroid and assigned the designation 1967 EU.[2]
The comet is estimated at 4.46 km in diameter.[7]
A close approach to Jupiter in 2021 lifted perihelion from 3.54 AU to 4.84 AU.
See also
References
- ^ Syuichi Nakano (2007-07-09). "74P/Smirnova-Chernykh (NK 1485)". OAA Computing and Minor Planet Sections. Retrieved 2010-02-24.
- ^ a b Seiichi Yoshida (2005-08-28). "74P/Smirnova-Chernykh". Seiichi Yoshida's Comet Catalog. Retrieved 2010-01-25.
- ^ MPC
- ^ "Horizons Batch for 74P/Smirnova-Chernykh (90000821) on 2026-Mar-02" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2025-09-29. (JPL#K264/21, Soln.date: 2025-Oct-01)
- ^ "Horizons Batch for 74P/Smirnova-Chernykh (90000821) on 2034-Jun-14" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Archived from the original on 2025-09-29. Retrieved 2025-09-29. (JPL#K264/20, Soln.date: 2025-Sep-22)
- ^ Kinoshita, Kazuo (2018-11-13). "74P/Smirnova-Chernykh past, present and future orbital elements". Comet Orbit. Retrieved 2025-10-05.
- ^ a b "JPL Small-Body Database Browser: 74P/Smirnova-Chernykh". Jet Propulsion Laboratory. Retrieved 2010-01-25.
2025-09-29 last obs
- ^ Toth, I. (March 2006). "The quasi-Hilda subgroup of ecliptic comets - an update". Astronomy and Astrophysics. 448 (3): 1191–1196. Bibcode:2006A&A...448.1191T. doi:10.1051/0004-6361:20053492.
- ^ a b c Kronk, Gary W. "74P/Smirnova-Chernykh". Retrieved 2010-01-25. (Cometography Home Page)
External links
- 74P/Smirnova–Chernykh at the JPL Small-Body Database
- 74P at Kazuo Kinoshita's Comets
- Images of 74P/Smirnova–Chernykh from the 2009 passage