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

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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 
[ show covariance matrix ]

[ 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  

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)		 Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1963-May-12 17:56 2_03:01 Earth 0.00869424837008226 0.00696888650201406 0.0201613975434496 10.7320481295015 10.7034540152493 2438162.247034965 3060.56348932566 684658.66476367 71.1105140649603 -53.3358861813425 14945.4852184755 T 8 CATAB v2.0e-lin.ifort 2017-Nov-29 23:28:24 2018-Dec-11 16:30
1963-May-13 04:21 1_19:59 Moon 0.0080011516126116 0.00691171261788043 0.019939433112975 11.2642091780668 11.2638455372918 2438162.681549985 2638.62173286257 731755.827075921 72.2102914382514 -59.7706948691366 14319.9174012125 T 8 CATAB v2.0e-lin.ifort 2017-Nov-29 23:28:24 2018-Dec-11 16:30
1980-Nov-02 22:25 9_15:59 Mars 0.0425454365804147 0.0410134017179219 0.241067373484277 14.6067367152009 14.606276027254 2444546.434104266 13919.3330263989 11281807.7597007 45.3963826439101 -74.5824369870817 133615.494138568 T 8 CATAB v2.0e-lin.ifort 2017-Nov-29 23:28:24 2018-Dec-11 16:30
2015-Jan-25 01:25 < 00:01 Earth 0.0136868798482862 0.0136535535000095 0.013720205686038 11.1038666394076 11.0863206877232 2457047.559280610 0.09560438771969 1656.59326460506 6.7949211121974 -0.122770631010336 819.427704492327 T 8 CATAB v2.0e-lin.ifort 2017-Nov-29 23:28:24 2018-Dec-11 16:30
2017-Jun-13 06:59 1_13:29 Earth 0.457868311435278 0.415466312770904 0.500285462268878 24.3324460885812 24.3322069288075 2457917.791113593 2248.71151538792 2118868.91017518 50.5355036106535 3.54845020347144 76624.9749817171 T 8 CATAB v2.0e-lin.ifort 2017-Nov-29 23:28:24 2018-Dec-11 16:30
2027-Dec-27 20:19 8_22:30 Earth 0.468336816924799 0.204271943263467 0.732833905267298 25.0064847066242 25.0062571951065 2461767.346250037 12870.3023476525 13197711.6295335 15.4627778288505 -2.55647744414888 190129.174623958 T 8 CATAB v2.0e-lin.ifort 2017-Nov-29 23:28:24 2018-Dec-11 16:30
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