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(2015 BK4)
Classification: Apollo [NEO]          SPK-ID: 3704157
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4807491953468096 0.00042597  
a 1.66790755714249 0.0012136 au
q .8660623411333752 8.0325e-05 au
i .7498808676264112 0.00074461 deg
node 258.2877344503181 0.010661 deg
peri 278.4870219798865 0.0081076 deg
M 156.0483317474775 0.95815 deg
tp 2458659.453952342660
(2019-Jun-24.95395234)
1.7218 TDB
period 786.78557970952
2.15
0.85872
0.002351
d
yr
n .4575579538874002 0.00049939 deg/d
Q 2.469752773151606 0.001797 au
  Orbit Determination Parameters
   # obs. used (total)      51  
   data-arc span      10 days  
   first obs. used      2015-01-13  
   last obs. used      2015-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .3591  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:36:15  

Additional Information
 Earth MOID = .00573299 au 
 Jupiter MOID = 2.49583 au 
 T_jup = 4.113 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457039.5 (2015-Jan-17.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4820836286333354 0.00042703  
q .8667122312374016 8.0337e-05 au
tp 2457085.495847733627
(2015-Mar-03.99584773)
0.0064546 TDB
node 260.499933070462 0.0050652 deg
peri 276.0970279576205 0.0024699 deg
i .7770456227657601 0.00068776 deg
  Orbit Determination Parameters
   # obs. used (total)      51  
   data-arc span      10 days  
   first obs. used      2015-01-13  
   last obs. used      2015-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .3591  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-06 08:36:15  

Additional Information
 Jupiter MOID = 2.49583 au 
 T_jup = 4.113 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.823588595028034E-7 -3.430505948369728E-8 -2.756170509583525E-6 2.103202495347042E-6 -9.043512188158568E-7 2.935387475923931E-7
q -3.430505948369728E-8 6.453984509778679E-9 5.18430609383965E-7 -3.950906756998805E-7 1.694594176932656E-7 -5.52087327131383E-8
tp -2.756170509583525E-6 5.18430609383965E-7 4.166240125667642E-5 -3.183814368149812E-5 1.372922162692225E-5 -4.437544665751584E-6
node 2.103202495347042E-6 -3.950906756998805E-7 -3.183814368149812E-5 2.565579793579212E-5 -1.192748366409456E-5 3.412052431406704E-6
peri -9.043512188158568E-7 1.694594176932656E-7 1.372922162692225E-5 -1.192748366409456E-5 6.100214035708245E-6 -1.484261040443599E-6
i 2.935387475923931E-7 -5.52087327131383E-8 -4.437544665751584E-6 3.412052431406704E-6 -1.484261040443599E-6 4.730139994941014E-7

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 24.9   n/a MPO324255  

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