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100715 (1998 BK21)
Classification: Main-belt Asteroid          SPK-ID: 2100715
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09868884404487702 3.8971e-08  
a 2.807826566769374 1.3645e-08 au
q 2.530725408616409 1.083e-07 au
i .4140686390858971 4.2671e-06 deg
node 15.19891996115295 0.00055652 deg
peri 358.9548746461215 0.00055693 deg
M 46.36294159785198 2.0771e-05 deg
tp 2458979.179151091977
(2020-May-09.67915109)		 9.9263e-05 TDB
period 1718.517049629563
4.71		 1.2527e-05
3.43e-08		 d
yr
n .2094829376744329 1.527e-09 deg/d
Q 3.084927724922339 1.4991e-08 au
   Orbit Determination Parameters
   # obs. used (total)      552  
   data-arc span      8395 days (22.98 yr)  
   first obs. used      1998-01-22  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:25:59  

Additional Information
 Earth MOID = 1.52984 au 
 Jupiter MOID = 2.38057 au 
 T_jup = 3.315 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457424.5 (2016-Feb-06.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1010733063419118 3.945e-08  
q 2.523297822164671 1.0996e-07 au
tp 2457253.727879889819
(2015-Aug-19.22787989)		 9.6891e-05 TDB
node 15.55486196052775 0.0005497 deg
peri 357.3036198692639 0.0005501 deg
i .4184761968377728 4.2758e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      552  
   data-arc span      8395 days (22.98 yr)  
   first obs. used      1998-01-22  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54945  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:25:59  

Additional Information
 Jupiter MOID = 2.38057 au 
 T_jup = 3.315 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.556334365595985E-15 -4.311589208408431E-15 6.534772995885455E-14 1.315204790873491E-14 -3.661877424892419E-14 -1.207378368821867E-16
q -4.311589208408431E-15 1.209070560361428E-14 -3.828593761272673E-13 -4.468695856765557E-14 6.896593656567368E-14 3.770203207847913E-16
tp 6.534772995885455E-14 -3.828593761272673E-13 9.387917046451447E-9 -4.479961279637792E-12 2.043648703291257E-9 -1.340592131715681E-13
node 1.315204790873491E-14 -4.468695856765557E-14 -4.479961279637792E-12 3.021737815860912E-7 -3.021655805164681E-7 1.307013244902626E-10
peri -3.661877424892419E-14 6.896593656567368E-14 2.043648703291257E-9 -3.021655805164681E-7 3.026101869767794E-7 -1.30727589148026E-10
i -1.207378368821867E-16 3.770203207847913E-16 -1.340592131715681E-13 1.307013244902626E-10 -1.30727589148026E-10 1.828249357452748E-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 15.9   n/a MPO417508  
diameter diameter 3.988 km 0.254 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.040   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

100715 (1998 BK21)          Discovered 1998-Jan-22 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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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
1967-Jun-05 18:14 00:02 Hygie 0.0246762443108047 0.0246669356572071 0.0246855542333732 3.0627729604666 3.0627724492457 2439647.259521164 2.48562163566999 541.292385011042 67.5653015708999 31.5417089103179 29075.423140079 T 19 CATAB v2.0f-lin.ifort 2021-Feb-24 08:26:01 2021-Feb-24 08:26
2028-Jul-18 05:15 < 00:01 Hygie 0.0327308254609071 0.0327274276956217 0.0327342235848854 3.02430307550231 3.02430268518287 2461970.718840179 0.973984215165279 251.647814200025 69.1770789905637 50.465282134453 55801.1024753286 T 19 CATAB v2.0f-lin.ifort 2021-Feb-24 08:26:01 2021-Feb-24 08:26

Alternate Designations
 1998 BK21 = 2001 UU114 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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