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JPL Small-Body Database Browser
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136839 (1997 WT22)
Classification: Amor [NEO]          SPK-ID: 2136839
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 89 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .305809729399089 3.6992e-08  
a 1.485561623980637 2.0986e-09 au
q 1.031262425745447 5.4287e-08 au
i 8.159451108506504 6.1838e-06 deg
node 71.95187476962464 2.4199e-05 deg
peri 74.76309346292564 2.6042e-05 deg
M 102.9302285011494 8.8961e-06 deg
tp 2458811.407253072696
(2019-Nov-23.90725307)
1.6245e-05 TDB
period 661.354685451506
1.81
1.4014e-06
3.837e-09
d
yr
n .5443372639814722 1.1534e-09 deg/d
Q 1.939860822215826 2.7403e-09 au
  Orbit Determination Parameters
   # obs. used (total)      467  
   data-arc span      10802 days (29.57 yr)  
   first obs. used      1988-12-13  
   last obs. used      2018-07-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52268  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-21 06:10:39  

Additional Information
 Earth MOID = .130534 au 
 Jupiter MOID = 3.09286 au 
 T_jup = 4.510 
[ 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 18.7   n/a MPO436675  

136839 (1997 WT22)          Discovered 1997-Nov-29 by LINEAR at Socorro
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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