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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1790716768958999 5.4913e-08  
a 2.478692251004258 1.4877e-08 au
q 2.034828673108053 1.3824e-07 au
i 13.34957868207126 6.0977e-06 deg
node 7.133705273243065 1.8363e-05 deg
peri 220.5153893695735 2.6963e-05 deg
M 105.9689320991128 2.7437e-05 deg
tp 2458180.926164918185
(2018-Mar-03.42616492)
0.00010566 TDB
period 1425.385512880126
3.90
1.2832e-05
3.513e-08
d
yr
n .2525632516585537 2.2738e-09 deg/d
Q 2.922555828900464 1.7541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1279  
   data-arc span      8420 days (23.05 yr)  
   first obs. used      1996-11-07  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51865  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 00:42:36  

Additional Information
 Earth MOID = 1.04583 au 
 Jupiter MOID = 2.11402 au 
 T_jup = 3.421 
[ 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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