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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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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09880079816729512 3.8787e-08  
a 2.808392166746787 1.3614e-08 au
q 2.530920779105426 1.077e-07 au
i .4140837766393808 4.2109e-06 deg
node 15.20758344814212 0.00055534 deg
peri 359.040141392652 0.00055575 deg
M 87.31448152565632 2.0674e-05 deg
tp 2458979.564538018573
(2020-May-10.06453802)
9.892e-05 TDB
period 1719.036334988824
4.71
1.25e-05
3.422e-08
d
yr
n .2094196572071529 1.5228e-09 deg/d
Q 3.085863554388149 1.4959e-08 au
  Orbit Determination Parameters
   # obs. used (total)      556  
   data-arc span      8411 days (23.03 yr)  
   first obs. used      1998-01-22  
   last obs. used      2021-02-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55169  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:33:26  

Additional Information
 Earth MOID = 1.53073 au 
 Jupiter MOID = 2.3805 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 16.03   n/a MPCxxxxx  
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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