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332970 (2011 ER81)
Classification: Outer Main-belt Asteroid          SPK-ID: 2332970
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03625771673199991 6.8906e-08  
a 3.233213407207156 4.5306e-08 au
q 3.115984471354534 2.2802e-07 au
i 10.40957177512011 9.7474e-06 deg
node 350.5943031687157 3.659e-05 deg
peri 104.8420373476329 0.00013275 deg
M 278.8895323769784 0.00012859 deg
tp 2459478.936591685697
(2021-Sep-21.43659169)
0.00076168 TDB
period 2123.48884249269
5.81
4.4634e-05
1.222e-07
d
yr
n .1695323247271732 3.5634e-09 deg/d
Q 3.350442343059777 4.6949e-08 au
  Orbit Determination Parameters
   # obs. used (total)      123  
   data-arc span      8437 days (23.10 yr)  
   first obs. used      1996-09-20  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57608  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-08 09:47:42  

Additional Information
 Earth MOID = 2.15384 au 
 Jupiter MOID = 1.71019 au 
 T_jup = 3.159 
[ 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 16.1   n/a MPO494759  

332970 (2011 ER81)          Discovered 2002-Oct-10 by Sloan Digital Sky Survey at Apache Point
Reference: 20120703/Numbers.arcLast Updated: 2012-07-09

[ show close-approach data ]
Alternate Designations
 2011 ER81 = 2002 TZ355 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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