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.[a]

2010 BK118
Discovery[1][2]
Discovered byWISE
LINEAR (704)
Discovery date
  • January 2010 (WISE)
  • 19 September 2010 (LINEAR)
Designations
2010 BK118
Centaur (DES)[3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 1
Observation arc1319 days (3.61 yr)
Aphelion
  • 792 AU (barycentric 2050)[a]
  • 963 AU (Q)
Perihelion6.1000 AU (912.55 Gm) (q)
  • 399 AU (barycentric 2050)[a]
  • 484.5 AU (a)
Eccentricity0.98741 (e)
  • 8000 yr (barycentric)
  • 10665 yr (heliocentric)
0.12498° (M)
0.000092409°/day (n)
Inclination143.913° (i)
176.01° (Ω)
179.06° (ω)
Earth MOID5.09422 AU (762.084 Gm)
Jupiter MOID1.13298 AU (169.491 Gm)
Physical characteristics
Dimensions
21[6]
10.2[4]

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

NotesEdit

  1. ^ a b c 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]

ReferencesEdit

  1. ^ a b Carl Hergenrother. "Recent Discoveries – Sept 17-24, 2010". The Transient Sky. Retrieved 4 February 2016.
  2. ^ "MPEC 2010-S36 : 2010 BK118". IAU Minor Planet Center. 22 September 2010. Retrieved 4 February 2016. (K10BB8K)
  3. ^ Marc W. Buie. "Orbit Fit and Astrometric record for 10BK118". SwRI (Space Science Department). Retrieved 4 February 2016.
  4. ^ a b c d "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. Archived from the original on 2 March 2001. Retrieved 4 February 2016.
  6. ^ a b "AstDyS 2010BK118 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 4 February 2016.
  7. ^ Horizons output. "Barycentric Osculating Orbital Elements for 2010 BK118". Retrieved 4 February 2016. (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0)

External linksEdit