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20250 (1998 EP11)
Classification: Main-belt Asteroid          SPK-ID: 2020250
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1785734872247232 4.8686e-08  
a 2.479726418280398 1.1651e-08 au
q 2.036913024404795 1.2663e-07 au
i 13.34631239627918 3.6123e-06 deg
node 7.119160518243818 1.7311e-05 deg
peri 220.5513653859169 2.5807e-05 deg
M 257.426116568791 2.642e-05 deg
tp 2459606.885662676043
(2022-Jan-27.38566268)
0.00010696 TDB
period 1426.277661228364
3.90
1.0052e-05
2.752e-08
d
yr
n .2524052712779323 1.7789e-09 deg/d
Q 2.922539812156002 1.3732e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1661  
   data-arc span      8894 days (24.35 yr)  
   first obs. used      1996-11-07  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47318  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:07  

Additional Information
 Earth MOID = 1.04674 au 
 Jupiter MOID = 2.11202 au 
 T_jup = 3.420 
[ 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 14.5   n/a MPO395197  
diameter diameter 2.989 km 0.079 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.239   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

20250 (1998 EP11)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 EP11 = 1996 VB31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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