Astronomy:2010 BK118
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Short description: Centaur on a retrograde cometary orbit
| Discovery[1][2] | |
|---|---|
| Discovered by | WISE LINEAR (704) |
| Discovery date |
|
| Designations | |
| 2010 BK118 | |
| Minor planet category | Centaur (DES)[3] |
| Orbital characteristics[4] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 1319 days (3.61 yr) |
| |{{{apsis}}}|helion}} |
|
| |{{{apsis}}}|helion}} | 6.1000 AU (912.55 Gm) (q) |
| |
| Eccentricity | 0.98741 (e) |
| Orbital period |
|
| Mean anomaly | 0.12498° (M) |
| Mean motion | 0.000092409°/day (n) |
| Inclination | 143.913° (i) |
| Longitude of ascending node | 176.01° (Ω) |
| 179.06° (ω) | |
| Earth MOID | 5.09422 AU (762.084 Gm) |
| Jupiter MOID | 1.13298 AU (169.491 Gm) |
| Physical characteristics | |
| Dimensions |
|
| Apparent magnitude | 21[6] |
| Absolute magnitude (H) | 10.2[4] |
2010 BK118 (also written 2010 BK118) is a centaur roughly 20–60 km in diameter. It is on a retrograde cometary orbit. It has a barycentric semi-major axis (average distance from the Sun) of ~400 AU.[lower-alpha 1]
2010 BK118 came to perihelion in April 2012 at a distance of 6.1 AU from the Sun (outside the orbit of Jupiter).[4] It has a Jupiter-MOID of 1.1 AU.[4] As of 2016[update], it is 11 AU from the Sun.[6]
It will not be 50 AU from the Sun until 2043. After leaving the planetary region of the Solar System, 2010 BK118 will have a barycentric aphelion of 791 AU with an orbital period of 8000 years.
| Orbital evolution | |||||||
| Epoch | Barycentric Aphelion (Q) (AU) |
Orbital period yr | |||||
|---|---|---|---|---|---|---|---|
| 1950 | 746 | 7300 | |||||
| 2050 | 792 | 8000 | |||||
Notes
- ↑ 1.0 1.1 1.2 Given the orbital eccentricity of this object, different epochs can generate quite different heliocentric unperturbed two-body best-fit solutions to the semi-major axis and orbital period. For objects at such high eccentricity, the Sun's barycentric coordinates are more stable than heliocentric coordinates. Using JPL Horizons, the barycentric semi-major axis is approximately 399 AU.[7]
References
- ↑ 1.0 1.1 Carl Hergenrother. "Recent Discoveries – Sept 17-24, 2010". The Transient Sky. https://transientsky.wordpress.com/tag/2010-bk118/. Retrieved 2016-02-04.
- ↑ "MPEC 2010-S36 : 2010 BK118". IAU Minor Planet Center. 2010-09-22. http://www.minorplanetcenter.org/mpec/K10/K10S36.html. Retrieved 2016-02-04. (K10BB8K)
- ↑ Marc W. Buie. "Orbit Fit and Astrometric record for 10BK118". SwRI (Space Science Department). http://www.boulder.swri.edu/~buie/kbo/astrom/10BK118.html. Retrieved 2016-02-04.
- ↑ 4.0 4.1 4.2 4.3 "JPL Small-Body Database Browser: (2010 BK118)". Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010BK118. Retrieved 25 March 2016.
- ↑ "Absolute Magnitude (H)". NASA/JPL. http://neo.jpl.nasa.gov/glossary/h.html. Retrieved 2016-02-04.
- ↑ 6.0 6.1 "AstDyS 2010BK118 Ephemerides". Department of Mathematics, University of Pisa, Italy. https://newton.spacedys.com/astdys/index.php?pc=1.1.3.0&n=2010BK118. Retrieved 2016-02-04.
- ↑ Horizons output. "Barycentric Osculating Orbital Elements for 2010 BK118". http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=2010BK118. Retrieved 2016-02-04. (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0)
External links
- 2010 BK118 at AstDyS-2, Asteroids—Dynamic Site
- 2010 BK118 at the JPL Small-Body Database
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