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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2794229520557059 1.4457e-08  
a 2.630576613916158 7.2881e-09 au
q 1.895533130847002 3.7778e-08 au
i 5.733105867292608 5.6451e-07 deg
node 67.04807143276132 8.6609e-06 deg
peri 48.03543106523671 8.1258e-06 deg
M 5.567710026810748 3.6405e-06 deg
tp 2459176.398228374185
(2020-Nov-22.89822837)		 1.5727e-05 TDB
period 1558.38535834517
4.27		 6.4764e-06
1.773e-08		 d
yr
n .2310083305597015 9.6003e-10 deg/d
Q 3.365620096985314 9.3246e-09 au
   Orbit Determination Parameters
   # obs. used (total)      1897  
   data-arc span      17183 days (47.04 yr)  
   first obs. used      1974-02-17  
   last obs. used      2021-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46606  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:59:51  

Additional Information
 Earth MOID = .917446 au 
 Jupiter MOID = 1.78079 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

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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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