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JPL Small-Body Database Browser
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172265 (2002 TW21)
Classification: Main-belt Asteroid          SPK-ID: 2172265
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02258846835383743 6.6695e-08  
a 2.698013714437409 2.5739e-08 au
q 2.63706971703062 1.8617e-07 au
i 6.523564726942304 7.0254e-06 deg
node 33.50929908244659 4.9624e-05 deg
peri 351.4321144657147 0.00013811 deg
M 344.0723363656146 0.00013207 deg
tp 2459072.116687731563
(2020-Aug-10.61668773)
0.0005941 TDB
period 1618.693624826637
4.43
2.3164e-05
6.342e-08
d
yr
n .222401567831316 3.1826e-09 deg/d
Q 2.758957711844197 2.6321e-08 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      5735 days (15.70 yr)  
   first obs. used      2002-10-02  
   last obs. used      2018-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54478  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 12:35:33  

Additional Information
 Earth MOID = 1.64045 au 
 Jupiter MOID = 2.31719 au 
 T_jup = 3.359 
[ 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 15.5   n/a MPO439989  

172265 (2002 TW21)          Discovered 2002-Oct-02 by LINEAR at Socorro
Reference: 20071224/Numbers.arcLast Updated: 2007-12-22

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