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20247 (1998 EB9)
Classification: Main-belt Asteroid          SPK-ID: 2020247
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 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075538018866852 2.8002e-08  
a 2.451654977279513 1.1441e-08 au
q 2.187970163558687 6.7858e-08 au
i 7.545034075936745 3.4321e-06 deg
node 100.1804550334343 2.7371e-05 deg
peri 197.1840215088538 3.4152e-05 deg
M 203.8263593509305 2.234e-05 deg
tp 2459808.764804622156
(2022-Aug-17.26480462)
8.88e-05 TDB
period 1402.127329259265
3.84
9.8149e-06
2.687e-08
d
yr
n .2567527160248604 1.7973e-09 deg/d
Q 2.71533979100034 1.2672e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1194  
   data-arc span      16252 days (44.50 yr)  
   first obs. used      1976-09-15  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52841  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:16:05  

Additional Information
 Earth MOID = 1.17123 au 
 Jupiter MOID = 2.44901 au 
 T_jup = 3.475 
[ 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 15.27   n/a E2021B10  
diameter diameter 2.593 km 0.491 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.316   0.143 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20247 (1998 EB9)          Discovered 1998-Mar-02 by Beijing Schmidt CCD Asteroid Program at Xinglong
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 EB9 = 1991 JV4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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