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13521 (1991 BK)
Classification: Main-belt Asteroid          SPK-ID: 2013521
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2793284243753646 2.8658e-08  
a 2.630093485063814 1.1073e-08 au
q 1.895433615921027 7.5071e-08 au
i 5.733482550657414 3.5455e-06 deg
node 67.04920624214863 4.4661e-05 deg
peri 48.06058598890279 4.5704e-05 deg
M 319.340328407791 1.2105e-05 deg
tp 2459176.461060543396
(2020-Nov-22.96106054)
5.3177e-05 TDB
period 1557.956061006668
4.27
9.8386e-06
2.694e-08
d
yr
n .2310719852826834 1.4592e-09 deg/d
Q 3.3647533542066 1.4166e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1492  
   data-arc span      16972 days (46.47 yr)  
   first obs. used      1974-02-17  
   last obs. used      2020-08-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50307  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:44:16  

Additional Information
 Earth MOID = .91746 au 
 Jupiter MOID = 1.78172 au 
 T_jup = 3.337 
[ 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 13.6   n/a MPO416857  

13521 (1991 BK)          Discovered 1991-Jan-19 by Hioki, T., Hayakawa, S. at Okutama
Reference: 20000222/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 BK = 1974 DV1 = 1994 UU2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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