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120784 (1998 EY20)
Classification: Main-belt Asteroid          SPK-ID: 2120784
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2295339044633754 3.9923e-08  
a 2.618129380551843 1.3005e-08 au
q 2.0171799214435 1.0296e-07 au
i 6.368394787776758 4.7675e-06 deg
node 154.2433005338961 3.1317e-05 deg
peri 44.36289101554934 3.2624e-05 deg
M 67.84606243737986 9.2913e-06 deg
tp 2458708.886765279784
(2019-Aug-13.38676528)
3.8876e-05 TDB
period 1547.337615888501
4.24
1.1529e-05
3.156e-08
d
yr
n .2326576929969374 1.7336e-09 deg/d
Q 3.219078839660185 1.599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      676  
   data-arc span      10116 days (27.70 yr)  
   first obs. used      1992-11-17  
   last obs. used      2020-07-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59032  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 10:11:00  

Additional Information
 Earth MOID = 1.02151 au 
 Jupiter MOID = 1.74894 au 
 T_jup = 3.360 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7   n/a MPO432708  

120784 (1998 EY20)          Discovered 1998-Mar-03 by Elst, E. W. at La Silla
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 EY20 = 2002 AE87 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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