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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2793284265329534 2.8682e-08  
a 2.630093486818934 1.1132e-08 au
q 1.895433611511232 7.5105e-08 au
i 5.733482588904169 3.5461e-06 deg
node 67.04920492229614 4.4716e-05 deg
peri 48.06058887230783 4.5771e-05 deg
M 319.3403261947846 1.2194e-05 deg
tp 2459176.461070296660
(2020-Nov-22.96107030)
5.3573e-05 TDB
period 1557.956062566156
4.27
9.8909e-06
2.708e-08
d
yr
n .2310719850513841 1.467e-09 deg/d
Q 3.364753362126636 1.4241e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1474  
   data-arc span      16776 days (45.93 yr)  
   first obs. used      1974-02-17  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50511  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:40:01  

Additional Information
 Earth MOID = .91746 au 
 Jupiter MOID = 1.78172 au 
 T_jup = 3.337 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457039.5 (2015-Jan-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2778366574442674 2.8875e-08  
q 1.900705937888524 7.5603e-08 au
tp 2457618.784734797417
(2016-Aug-18.28473480)
4.7314e-05 TDB
node 67.08166752495869 4.4743e-05 deg
peri 48.16628707243808 4.5806e-05 deg
i 5.730394113578037 3.5443e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1474  
   data-arc span      16776 days (45.93 yr)  
   first obs. used      1974-02-17  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50511  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:40:01  

Additional Information
 Jupiter MOID = 1.78172 au 
 T_jup = 3.337 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.337941297166152E-16 -2.170801612671161E-15 3.403895623670368E-13 -3.918871231655142E-15 9.671129723290916E-14 7.828575207892773E-16
q -2.170801612671161E-15 5.715768377027608E-15 -6.692221463684602E-13 9.709808510621843E-15 -2.127567517034437E-13 -1.953171737571044E-15
tp 3.403895623670368E-13 -6.692221463684602E-13 2.238599222893842E-9 -1.551853300977112E-11 4.907336565446459E-10 1.610833998809074E-12
node -3.918871231655142E-15 9.709808510621843E-15 -1.551853300977112E-11 2.001933573612562E-9 -1.995235460587511E-9 -5.449871962426692E-11
peri 9.671129723290916E-14 -2.127567517034437E-13 4.907336565446459E-10 -1.995235460587511E-9 2.098230123097673E-9 5.457354917215873E-11
i 7.828575207892773E-16 -1.953171737571044E-15 1.610833998809074E-12 -5.449871962426692E-11 5.457354917215873E-11 1.256186038504832E-11

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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