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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2162584998738133 3.5944e-08  
a 2.288955875607685 7.6348e-09 au
q 1.793949711671416 8.2352e-08 au
i 7.10125429913248 3.3975e-06 deg
node 192.6309522272372 2.9354e-05 deg
peri 130.3002531467687 3.0115e-05 deg
M 348.679259568006 7.7843e-06 deg
tp 2459040.276529668490
(2020-Jul-09.77652967)
2.7461e-05 TDB
period 1264.895239554051
3.46
6.3286e-06
1.733e-08
d
yr
n .2846085499751906 1.424e-09 deg/d
Q 2.783962039543954 9.2859e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1440  
   data-arc span      14417 days (39.47 yr)  
   first obs. used      1981-02-12  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49954  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 01:31:45  

Additional Information
 Earth MOID = .792015 au 
 Jupiter MOID = 2.58516 au 
 T_jup = 3.558 
[ 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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