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78828 (2003 QB21)
Classification: Main-belt Asteroid          SPK-ID: 2078828
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2212897566512371 3.2743e-08  
a 3.10016049773852 2.252e-08 au
q 2.414126735614185 1.0154e-07 au
i 15.86720730941948 6.0227e-06 deg
node 11.97427576282264 1.3798e-05 deg
peri 254.4091632993272 1.9843e-05 deg
M 84.42616965456828 1.5666e-05 deg
tp 2458532.927156506033
(2019-Feb-18.42715651)
8.5176e-05 TDB
period 1993.768334469503
5.46
2.1724e-05
5.948e-08
d
yr
n .1805626028742141 1.9674e-09 deg/d
Q 3.786194259862854 2.7503e-08 au
  Orbit Determination Parameters
   # obs. used (total)      829  
   data-arc span      8924 days (24.43 yr)  
   first obs. used      1996-05-22  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51787  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:25:23  

Additional Information
 Earth MOID = 1.45762 au 
 Jupiter MOID = 1.61527 au 
 T_jup = 3.127 
[ 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 14.3   n/a MPO309743  

78828 (2003 QB21)          Discovered 2003-Aug-22 by NEAT at Palomar
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 2003 QB21 = 1996 KT2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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