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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4808214222862048 0.0004288  
a 1.667862175616697 0.0012084 au
q .8659183121593126 8.7796e-05 au
i .7498998901538114 0.00074527 deg
node 258.2857195059375 0.01044 deg
peri 278.4800299325051 0.0078927 deg
M 247.5872500600213 1.0578 deg
tp 2459446.169780442278
(2021-Aug-19.66978044)		 2.5787 TDB
period 786.7534688586662
2.15		 0.85504
0.002341		 d
yr
n .4575766288291651 0.00049729 deg/d
Q 2.469806039074081 0.0017895 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 = .00570499 au 
 Jupiter MOID = 2.49481 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 = 2.49481 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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