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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 
[ show covariance matrix ]

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

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