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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09852639313484442 4.4162e-08  
a 2.807190968042168 1.5625e-08 au
q 2.530608567120261 1.2637e-07 au
i .4140599005608269 5.11e-06 deg
node 15.200150654369 0.00061067 deg
peri 358.8746653371048 0.00061109 deg
M 4.533609584224561 2.3196e-05 deg
tp 2458978.865444300208
(2020-May-09.36544430)
0.00011067 TDB
period 1717.933559834131
4.70
1.4343e-05
3.927e-08
d
yr
n .209554087781345 1.7496e-09 deg/d
Q 3.083773368964075 1.7164e-08 au
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      8314 days (22.76 yr)  
   first obs. used      1998-01-22  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56259  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:39  

Additional Information
 Earth MOID = 1.53116 au 
 Jupiter MOID = 2.38063 au 
 T_jup = 3.315 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457015.5 (2014-Dec-24.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1013453502159133 4.4724e-08  
q 2.523238899858717 1.2847e-07 au
tp 2457253.978799880330
(2015-Aug-19.47879988)
0.00010431 TDB
node 15.55627863701321 0.00060365 deg
peri 357.3684256270045 0.00060405 deg
i .4186298840269098 5.1159e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      477  
   data-arc span      8314 days (22.76 yr)  
   first obs. used      1998-01-22  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56259  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:04:39  

Additional Information
 Jupiter MOID = 2.38063 au 
 T_jup = 3.315 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.00026238398171E-15 -5.711759912207037E-15 -7.624561432253795E-13 3.861475714910127E-15 -1.763819761210865E-13 -7.630677380131438E-17
q -5.711759912207037E-15 1.650548023008501E-14 2.220944708640679E-12 -1.872698393469392E-14 5.119625822273127E-13 2.811769362408655E-16
tp -7.624561432253795E-13 2.220944708640679E-12 1.087967760748841E-8 -1.651088185388277E-11 2.322240080003216E-9 1.262367173317527E-13
node 3.861475714910127E-15 -1.872698393469392E-14 -1.651088185388277E-11 3.643886237867441E-7 -3.643813978419902E-7 -5.64620249267097E-10
peri -1.763819761210865E-13 5.119625822273127E-13 2.322240080003216E-9 -3.643813978419902E-7 3.648745009877182E-7 5.646282815906219E-10
i -7.630677380131438E-17 2.811769362408655E-16 1.262367173317527E-13 -5.64620249267097E-10 5.646282815906219E-10 2.617276837834076E-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

[ 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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