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JPL Small-Body Database Browser
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154157 (2002 GW21)
Classification: Main-belt Asteroid          SPK-ID: 2154157
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2460774675690921 1.066e-07  
a 3.106767004312899 3.3264e-08 au
q 2.342261647564366 3.4325e-07 au
i 21.3559403705546 1.1401e-05 deg
node 223.197907203984 2.1846e-05 deg
peri 342.7989618936661 2.9095e-05 deg
M 116.5802730377953 1.9723e-05 deg
tp 2458352.784902176551
(2018-Aug-22.28490218)
0.00010385 TDB
period 2000.144871344104
5.48
3.2123e-05
8.795e-08
d
yr
n .179986962523409 2.8907e-09 deg/d
Q 3.871272361061431 4.145e-08 au
  Orbit Determination Parameters
   # obs. used (total)      226  
   data-arc span      9835 days (26.93 yr)  
   first obs. used      1991-05-15  
   last obs. used      2018-04-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54913  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 08:07:55  

Additional Information
 Earth MOID = 1.34344 au 
 Jupiter MOID = 1.15681 au 
 T_jup = 3.070 
[ 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 15.1   n/a MPO436779  

154157 (2002 GW21)          Discovered 2002-Apr-14 by LINEAR at Socorro
Reference: 20070402/Numbers.arcLast Updated: 2007-04-04

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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