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19948 (1981 EP40)
Classification: Main-belt Asteroid          SPK-ID: 2019948
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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2160399786381146 3.4115e-08  
a 2.288357664490183 5.2962e-09 au
q 1.793980923537358 7.6686e-08 au
i 7.10199744604467 3.2943e-06 deg
node 192.6259050075369 2.08e-05 deg
peri 130.3004401339657 2.1884e-05 deg
M 45.62336774165168 5.8797e-06 deg
tp 2459040.260669039086
(2020-Jul-09.76066904)
2.0557e-05 TDB
period 1264.399407614634
3.46
4.3895e-06
1.202e-08
d
yr
n .284720158702986 9.8843e-10 deg/d
Q 2.782734405443009 6.4404e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1889  
   data-arc span      14583 days (39.93 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-01-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4687  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 02:45:31  

Additional Information
 Earth MOID = .790146 au 
 Jupiter MOID = 2.58618 au 
 T_jup = 3.559 
[ 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 15.1   n/a MPO337426  

19948 (1981 EP40)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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