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22520 (1998 EL2)
Classification: Main-belt Asteroid          SPK-ID: 2022520
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1894849152925643 3.4772e-08  
a 2.281623020284418 6.7241e-09 au
q 1.84928987555626 7.9551e-08 au
i 2.707849160952919 4.322e-06 deg
node 156.9846795121371 8.3736e-05 deg
peri 156.8808484898424 8.4484e-05 deg
M 120.3169476646734 1.1979e-05 deg
tp 2458779.784447494076
(2019-Oct-23.28444749)
4.1307e-05 TDB
period 1258.82181888664
3.45
5.5647e-06
1.524e-08
d
yr
n .2859816970112583 1.2642e-09 deg/d
Q 2.713956165012576 7.9982e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1419  
   data-arc span      10903 days (29.85 yr)  
   first obs. used      1991-04-08  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55507  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:07:14  

Additional Information
 Earth MOID = .833796 au 
 Jupiter MOID = 2.56516 au 
 T_jup = 3.579 
[ 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 15.2   n/a MPO395220  
diameter diameter 2.636 km 0.700 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  
geometric albedo albedo 0.211   0.155 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

22520 (1998 EL2)          Discovered 1998-Mar-02 by ODAS at Caussols
Reference: 20010309/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 EL2 = 1999 XO109 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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