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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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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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2301406520007796 3.7038e-08  
a 2.616824765771347 1.2786e-08 au
q 2.014587008004942 9.4685e-08 au
i 6.373482858797513 4.6322e-06 deg
node 154.2260079701539 2.8673e-05 deg
peri 44.25621125382867 3.0097e-05 deg
M 114.4658998191082 9.4144e-06 deg
tp 2458708.874937409291
(2019-Aug-13.37493741)
3.8624e-05 TDB
period 1546.18120167095
4.23
1.1332e-05
3.103e-08
d
yr
n .2328317014920049 1.7064e-09 deg/d
Q 3.219062523537753 1.5728e-08 au
  Orbit Determination Parameters
   # obs. used (total)      733  
   data-arc span      10196 days (27.92 yr)  
   first obs. used      1992-11-17  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58229  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:07  

Additional Information
 Earth MOID = 1.01824 au 
 Jupiter MOID = 1.7478 au 
 T_jup = 3.360 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457539.5 (2016-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2291784734474855 3.7088e-08  
q 2.017184809466663 9.4662e-08 au
tp 2457161.329873364809
(2015-May-18.82987336)
3.4847e-05 TDB
node 154.2930227859796 2.8716e-05 deg
peri 44.08240945934151 3.0146e-05 deg
i 6.367350970629609 4.6285e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      733  
   data-arc span      10196 days (27.92 yr)  
   first obs. used      1992-11-17  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58229  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 17:08:07  

Additional Information
 Jupiter MOID = 1.7478 au 
 T_jup = 3.360 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.375551828597388E-15 -3.49361065867198E-15 -3.952616930873975E-13 -2.072849696704474E-15 -1.084145010572363E-13 -2.637844847362622E-16
q -3.49361065867198E-15 8.960920549502893E-15 1.104609191930375E-12 4.417719843504686E-15 3.051950799721979E-13 5.545588930642835E-16
tp -3.952616930873975E-13 1.104609191930375E-12 1.214322227965438E-9 -2.758370838866839E-12 3.26648112304782E-10 -4.767096626877253E-13
node -2.072849696704474E-15 4.417719843504686E-15 -2.758370838866839E-12 8.245990884497745E-10 -8.197727662219033E-10 -7.902033614192469E-13
peri -1.084145010572363E-13 3.051950799721979E-13 3.26648112304782E-10 -8.197727662219033E-10 9.087579383611653E-10 6.583763759604235E-13
i -2.637844847362622E-16 5.545588930642835E-16 -4.767096626877253E-13 -7.902033614192469E-13 6.583763759604235E-13 2.142313564157226E-11

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 15.77   n/a E2021B55  

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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