2010 BK118
| Discovery[1][2] | |
|---|---|
| Discovered by |
WISE LINEAR (704) |
| Discovery date |
January 2010 (WISE) 19 September 2010 (LINEAR) |
| Designations | |
| MPC designation | 2010 BK118 |
| Centaur[3] | |
| Orbital characteristics[4] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 1319 days (3.61 yr) |
| Aphelion |
792 AU (barycentric 2050)[lower-alpha 1] 963 AU (Q) |
| Perihelion | 6.1000 AU (912.55 Gm) (q) |
|
399 AU (barycentric 2050)[lower-alpha 1] 484.5 AU (a) | |
| Eccentricity | 0.98741 (e) |
|
8000 yr (barycentric) 10665 yr (heliocentric) | |
| 0.12498° (M) | |
| 0.000092409°/day (n) | |
| Inclination | 143.913° (i) |
| 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 |
20–50 km[5] 60 km (if albedo=0.04)[1] |
| 21[6] | |
| 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, 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 2 3 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 2 Carl Hergenrother. "Recent Discoveries – Sept 17-24, 2010". The Transient Sky. Retrieved 2016-02-04.
- ↑ "MPEC 2010-S36 : 2010 BK118". IAU Minor Planet Center. 2010-09-22. Retrieved 2016-02-04. (K10BB8K)
- ↑ Marc W. Buie. "Orbit Fit and Astrometric record for 10BK118". SwRI (Space Science Department). Retrieved 2016-02-04.
- 1 2 3 4 "JPL Small-Body Database Browser: (2010 BK118)" (last observation: 2013-09-10; arc: 3.61 yr). Jet Propulsion Laboratory. Retrieved 25 March 2016.
- ↑ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2016-02-04.
- 1 2 "AstDyS 2010BK118 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2016-02-04.
- ↑ Horizons output. "Barycentric Osculating Orbital Elements for 2010 BK118". Retrieved 2016-02-04. (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0)
External links
- Orbital simulation from JPL (Java) / Ephemeris
- 2010 BK118 at the JPL Small-Body Database
This article is issued from Wikipedia - version of the 7/26/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.