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19115 (1981 EM39)
Classification: Main-belt Asteroid          SPK-ID: 2019115
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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09072948100673763 3.5448e-08  
a 2.291160282419909 8.1141e-09 au
q 2.0832844990927 7.8616e-08 au
i 5.278172883640346 4.7155e-06 deg
node 358.5294281919711 3.7634e-05 deg
peri 227.8336646945747 4.5749e-05 deg
M 66.49817226429127 2.6145e-05 deg
tp 2458766.514555057792
(2019-Oct-10.01455506)
9.1905e-05 TDB
period 1266.72293855553
3.47
6.7291e-06
1.842e-08
d
yr
n .284197900774194 1.5097e-09 deg/d
Q 2.499036065747118 8.8503e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1177  
   data-arc span      14523 days (39.76 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50908  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:09:55  

Additional Information
 Earth MOID = 1.07858 au 
 Jupiter MOID = 2.48708 au 
 T_jup = 3.587 
[ 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 15.5   n/a MPO384918  
diameter diameter 2.164 km 0.462 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.314   0.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19115 (1981 EM39)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20001211/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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