2010 BK118

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 (DES)[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. 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. 1 2 Carl Hergenrother. "Recent Discoveries – Sept 17-24, 2010". The Transient Sky. Retrieved 2016-02-04.
    2. ↑ "MPEC 2010-S36 : 2010 BK118". IAU Minor Planet Center. 2010-09-22. Retrieved 2016-02-04. (K10BB8K)
    3. ↑ Marc W. Buie. "Orbit Fit and Astrometric record for 10BK118". SwRI (Space Science Department). Retrieved 2016-02-04.
    4. 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.
    5. ↑ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2016-02-04.
    6. 1 2 "AstDyS 2010BK118 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2016-02-04.
    7. ↑ 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)
    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.