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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2181277036588146 5.7128e-08  
a 3.114225246711121 2.2286e-08 au
q 2.434926444969719 1.8331e-07 au
i 21.30880689034436 6.8123e-06 deg
node 190.9638717477372 1.4047e-05 deg
peri 333.9099840445149 1.9674e-05 deg
M .03944804707405068 1.2999e-05 deg
tp 2458600.280038604849
(2019-Apr-26.78003860)
7.2484e-05 TDB
period 2007.351646727148
5.50
2.1547e-05
5.899e-08
d
yr
n .179340774989253 1.9251e-09 deg/d
Q 3.793524048452523 2.7147e-08 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      13967 days (38.24 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .63753  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 03:33:08  

Additional Information
 Earth MOID = 1.45539 au 
 Jupiter MOID = 1.25515 au 
 T_jup = 3.078 
[ 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 14.9   n/a MPO390107  

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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