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120782 (1998 EM12)
Classification: Main-belt Asteroid          SPK-ID: 2120782
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08252717199800437 4.0705e-08  
a 2.668963215765185 1.5813e-08 au
q 2.448701229401385 1.0327e-07 au
i 21.85378929299549 7.032e-06 deg
node 3.466124251843 1.0392e-05 deg
peri 103.7378215367705 4.3992e-05 deg
M 132.5736705705497 4.1689e-05 deg
tp 2458614.001252079930
(2019-May-10.50125208)
0.00018426 TDB
period 1592.620528213151
4.36
1.4154e-05
3.875e-08
d
yr
n .226042546622141 2.0088e-09 deg/d
Q 2.889225202128986 1.7118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      762  
   data-arc span      8137 days (22.28 yr)  
   first obs. used      1998-03-01  
   last obs. used      2020-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53543  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:07  

Additional Information
 Earth MOID = 1.54419 au 
 Jupiter MOID = 2.22809 au 
 T_jup = 3.274 
[ 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 14.68   n/a E2021B55  

120782 (1998 EM12)          Discovered 1998-Mar-01 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 EM12 = 2000 QA138 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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