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213991 (2004 BK42)
Classification: Main-belt Asteroid          SPK-ID: 2213991
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2002207244944438 7.1575e-08  
a 2.770409345723656 1.7508e-08 au
q 2.215715979376687 1.9416e-07 au
i 5.039681556526045 6.1139e-06 deg
node 303.3378186005886 6.9214e-05 deg
peri 230.8910748519247 7.0047e-05 deg
M 211.458726460251 1.2999e-05 deg
tp 2459895.458681550998
(2022-Nov-11.95868155)
6.4308e-05 TDB
period 1684.280196314669
4.61
1.5966e-05
4.371e-08
d
yr
n .2137411582631601 2.0261e-09 deg/d
Q 3.325102712070624 2.1013e-08 au
  Orbit Determination Parameters
   # obs. used (total)      366  
   data-arc span      6656 days (18.22 yr)  
   first obs. used      2002-10-16  
   last obs. used      2021-01-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .63962  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:44:55  

Additional Information
 Earth MOID = 1.22478 au 
 Jupiter MOID = 1.68073 au 
 T_jup = 3.302 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.93   n/a MPCxxxxx  
rotation period rot_per 4.61 h n/a LCDB (Rev. 2020-October); 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:
[Chang, C.-K.; Ip, W.-H.; Cheng, Y.-C.; Ngeow, C.-C.; et al. (2014) Astrophys. J. 788, A17.]

213991 (2004 BK42)          Discovered 2004-Jan-21 by LINEAR at Socorro
Reference: 20090509/Numbers.arcLast Updated: 2009-05-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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