28P/Neujmin, also known as Neujmin 1, is a large periodic comet in the Solar System. With a perihelion distance (closest approach to the Sun) of 1.5
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Discovery | |
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Discovered by | Grigory Nikolaevich Neujmin |
Discovery date | September 3, 1913 |
Designations | |
1913 III; 1931 I; 1948 XIII; 1966 VI; 1984 XIX | |
Orbital characteristics | |
Epoch | March 6, 2006 |
Aphelion | 12.27 |
Perihelion | 1.551 |
Semi-major axis | 6.911 |
Eccentricity | 0.7755 |
Orbital period | 18.17 yr 18y 4m 12d (perihelion to perihelion) |
Inclination | 14.2514° |
Last perihelion | March 11, 2021[1][2] December 27, 2002[1][2] |
Next perihelion | 2039-Jul-23[3][4] |
Earth MOID | 0.55 |
Physical characteristics | |
Dimensions | 21.4 km[5] |
12.75 ± 0.03 hours[6] |
The comet nucleus is estimated to be 21.4 kilometers in diameter with a low albedo of 0.025.[5] Since 28P has such a large nucleus, it became brighter than the 20th magnitude in early 2019, roughly 2 years before coming to perihelion. When it came to opposition in May 2020, when it was still 3.5
References
edit- ^ a b Seiichi Yoshida (2004-09-07). "28P/Neujmin 1". Seiichi Yoshida's Comet Catalog. Retrieved 2010-02-26.
- ^ a b Syuichi Nakano (2001-05-01). "28P/Neujmin 1 (NK 798)". OAA Computing and Minor Planet Sections. Retrieved 2010-02-26.
- ^ "28P/Neujmin Orbit". Minor Planet Center. Retrieved 2021-09-12.
- ^ "Horizons Batch for 28P/Neujmin 1 (90000386) on 2039-Jul-23" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2023-05-02. (JPL#74/Soln.date: 2023-Mar-29)
- ^ a b c d "JPL Small-Body Database Browser: 28P/Neujmin 1" (last observation: 2023-03-21). Jet Propulsion Laboratory. Retrieved 2010-02-25.
- ^ Delahodde, C. E.; Meech, K. J.; Hainaut, O. R.; Dotto, E. (September 2001). "Detailed phase function of comet 28P/Neujmin 1". Astronomy & Astrophysics. 376 (2): 672–685. Bibcode:2001A&A...376..672D. doi:10.1051/0004-6361:20011028.
External links
edit- Orbital simulation from JPL (Java) / Horizons Ephemeris
- 28P at Kronk's Cometography
- 28P/Neujmin 1 – Seiichi Yoshida @ aerith.net