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JPL Small-Body Database Browser
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56342 (1999 XW238)
Classification: Main-belt Asteroid          SPK-ID: 2056342
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1464904820198234 4.1743e-08  
a 2.257685398514186 1.1552e-08 au
q 1.926955976236726 9.1679e-08 au
i 8.171282038239204 6.2701e-06 deg
node 54.65541047495621 3.0325e-05 deg
peri 229.3138985890195 3.7094e-05 deg
M 26.57982764739677 2.0809e-05 deg
tp 2458509.016404930919
(2019-Jan-25.51640493)
7.1521e-05 TDB
period 1239.063498144795
3.39
9.5096e-06
2.604e-08
d
yr
n .2905420105902682 2.2299e-09 deg/d
Q 2.588414820791647 1.3244e-08 au
  Orbit Determination Parameters
   # obs. used (total)      490  
   data-arc span      7894 days (21.61 yr)  
   first obs. used      1998-04-18  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61577  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 04:51:25  

Additional Information
 Earth MOID = .921483 au 
 Jupiter MOID = 2.54893 au 
 T_jup = 3.595 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO270410  

56342 (1999 XW238)          Discovered 1999-Dec-05 by Spacewatch at Kitt Peak
Reference: 20030318/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1999 XW238 = 2002 TQ173 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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