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58111 (1981 ER2)
Classification: Main-belt Asteroid          SPK-ID: 2058111
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2181450833848522 3.514e-08  
a 3.118308720603146 1.8341e-08 au
q 2.438065004727461 1.0716e-07 au
i 21.30372705816541 4.4705e-06 deg
node 190.8663187686014 1.339e-05 deg
peri 334.3576746462603 1.7474e-05 deg
M 107.2242086705203 1.179e-05 deg
tp 2458601.443975941535
(2019-Apr-27.94397594)
6.4452e-05 TDB
period 2011.301098278378
5.51
1.7745e-05
4.858e-08
d
yr
n .1789886160297683 1.5792e-09 deg/d
Q 3.798552436478831 2.2342e-08 au
  Orbit Determination Parameters
   # obs. used (total)      572  
   data-arc span      14445 days (39.55 yr)  
   first obs. used      1981-02-02  
   last obs. used      2020-08-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .61302  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 11:28:04  

Additional Information
 Earth MOID = 1.45714 au 
 Jupiter MOID = 1.24537 au 
 T_jup = 3.076 
[ 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 14.92   n/a E2021B10  

58111 (1981 ER2)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20030614/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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