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11284 Belenus (1990 BA)
Classification: Amor [NEO]          SPK-ID: 2011284
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3374225081363498 4.0471e-08  
a 1.740060116435549 3.1636e-09 AU
q 1.152924667639837 6.9638e-08 AU
i 1.992929113653641 4.2376e-06 deg
node 311.7959757076869 0.00010167 deg
peri 171.0010527516405 0.00010258 deg
M 298.7374896422593 9.2961e-06 deg
tp 2457143.171456272749
2.178e-05 JED
period 838.3875221283674
n .4293957036551405 1.171e-09 deg/d
Q 2.327195565231261 4.2311e-09 AU
  Orbit Determination Parameters
   # obs. used (total)      520  
   data-arc span      23415 days (64.11 yr)  
   first obs. used      1950-12-09  
   last obs. used      2015-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51616  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:31:43  

Additional Information
 Earth MOID = .168833 AU 
 T_jup = 4.078 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.1 mag n/a MPO263451  
rotation period rot_per 5.43 h n/a LCDB (Rev. 2015-Feb); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hicks, M.; Brewer, M.; Carcione, A.; Ebelhar, S.; Borlase, R. (2013) Astronomer's Telegram 4969.]

11284 Belenus           Discovered 1990 Jan. 21 by A. Maury at Caussols.
Belenus, husband of Belisana, is the Gaulish god of light, with responsibilities also to sheep and cattle.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2015-Mar-27 13:12 UT
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