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100238 (1994 PY31)
Classification: Main-belt Asteroid          SPK-ID: 2100238
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1607383237926948 2.8069e-08  
a 2.368687409921282 9.5528e-09 au
q 1.987948566061676 6.7406e-08 au
i 4.831110502337634 4.9518e-06 deg
node 202.3933339204575 3.8717e-05 deg
peri 90.99539054881038 4.2078e-05 deg
M 110.8134862246788 1.6856e-05 deg
tp 2458790.626187188067
(2019-Nov-03.12618719)		 6.1726e-05 TDB
period 1331.557896419964
3.65		 8.0552e-06
2.205e-08		 d
yr
n .270360005350048 1.6355e-09 deg/d
Q 2.749426253780888 1.1088e-08 au
   Orbit Determination Parameters
   # obs. used (total)      684  
   data-arc span      13698 days (37.50 yr)  
   first obs. used      1983-07-16  
   last obs. used      2021-01-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53043  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:24:47  

Additional Information
 Earth MOID = .977243 au 
 Jupiter MOID = 2.43933 au 
 T_jup = 3.524 
[ 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 16.11   n/a E2021B55  

100238 (1994 PY31)          Discovered 1994-Aug-12 by Elst, E. W. at La Silla
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1994 PY31 = 2002 XJ57 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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