(15810) 1994 JR1
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(15810) 1994 JR1
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Discovery
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| Discovered by | M. J. Irwin, A. Zytkow |
| Discovery date | May 12, 1994 |
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Designations
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| MPC designation | (15810) 1994 JR1 |
| Minor planet category |
Plutino[1][2] |
| Aphelion | 44.507 AU |
| Perihelion | 34.756 AU |
| Semi-major axis | 39.631 AU |
| Eccentricity | 0.123 |
| Mean anomaly | 15.6° |
| Inclination | 3.8° |
| Longitude of ascending node | 144.7° |
| Argument of perihelion | 102.8° |
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Physical characteristics
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| Dimensions | 127 km[4] |
| Albedo | 0.09 (assumed) |
| Absolute magnitude (H) | 7.7[3] |
(15810) 1994 JR1, also written as 1994 JR1, is a plutino, with 2:3 resonance with Neptune, similar to the dwarf planet Pluto. It has a perihelion (closest approach to the Sun) at 34.756 AU and an aphelion (farthest distance from the Sun) at 44.507[4], so it is in a relatively eccentric orbit. It is about 127 km in diameter.[4] It was discovered on May 12, 1994 by M. J. Irwin and A. Zytkow.[3]
(15810) 1994 JR1 is currently one of Pluto's closest neighbors. In 2017, it will be only 2.7 AU from Pluto.[5] It is currently the best known target for a flyby by the New Horizons spacecraft after its Pluto flyby in 2015, but it is hoped that still better targets will be found by then.[6]
References
- ^ Marc W. Buie (2006-10-14). "Orbit Fit and Astrometric record for 15810". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/15810.html. Retrieved 2008-10-02.
- ^ Brian G. Marsden (2008-07-17). "MPEC 2008-O05 : Distant Minor Planets (2008 Aug. 2.0 TT)". IAU Minor Planet Center. Harvard-Smithsonian Center for Astrophysics. Archived from the original on 07 December 2008. http://web.archive.org/web/20081207213636/http://cfa-www.harvard.edu/iau/mpec/K08/K08O05.html. Retrieved 2008-10-02.
- ^ a b c "JPL Small-Body Database Browser: 15810 (1994 JR1)". 2000-06-25 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=15810. Retrieved 2008-10-02.
- ^ a b c "List of Known Trans-Neptunian Objects". Johnston's Archive. Archived from the original on 18 February 2007. http://web.archive.org/web/20070218170146/http://www.johnstonsarchive.net/astro/tnoslist.html. Retrieved 2007-01-25.
- ^ "50000 Quaoar distance (AU) from Pluto". http://home.surewest.net/kheider/astro/50000.txt. Retrieved 2007-12-18.
- ^ Ted Stryk / Emily Lakdawalla (Jan. 24, 2011). "Ted Stryk: Report from the 2011 New Horizons Science Team Meeting". The Planetary Society Blog. http://www.planetary.org/blog/article/00002890/. Retrieved 2011-01-25.
External links
- Orbital simulation from JPL (Java) / Ephemeris
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