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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1608235817644003 3.802e-08  
a 2.368409671485607 1.2003e-08 au
q 1.987513545031845 9.4916e-08 au
i 4.831470694986127 5.5099e-06 deg
node 202.3942943024368 4.5063e-05 deg
peri 90.94946996040834 4.9065e-05 deg
M 56.77292295391533 1.7666e-05 deg
tp 2458790.546838171752
(2019-Nov-03.04683817)		 6.5345e-05 TDB
period 1331.32370724549
3.64		 1.0121e-05
2.771e-08		 d
yr
n .2704075635705762 2.0556e-09 deg/d
Q 2.749305797939369 1.3933e-08 au
   Orbit Determination Parameters
   # obs. used (total)      558  
   data-arc span      13161 days (36.03 yr)  
   first obs. used      1983-07-16  
   last obs. used      2019-07-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56757  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 01:02:49  

Additional Information
 Earth MOID = .978742 au 
 Jupiter MOID = 2.4401 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 16.1   n/a MPO436466  

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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