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541288 (2011 ET81)
Classification: Main-belt Asteroid          SPK-ID: 2541288
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 .1168864672923883 5.3181e-08  
a 3.017858980240286 3.2108e-08 au
q 2.665112105253389 1.6801e-07 au
i 3.167861864752217 6.3482e-06 deg
node 51.81937398311732 0.0001233 deg
peri 53.53917744568601 0.00012955 deg
M 7.118657708569279 3.4973e-05 deg
tp 2459162.634608620208
(2020-Nov-09.13460862)
0.00018612 TDB
period 1914.903266147452
5.24
3.0559e-05
8.367e-08
d
yr
n .1879990526750081 3.0002e-09 deg/d
Q 3.370605855227182 3.586e-08 au
  Orbit Determination Parameters
   # obs. used (total)      130  
   data-arc span      6352 days (17.39 yr)  
   first obs. used      2003-09-21  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .59016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 20:22:45  

Additional Information
 Earth MOID = 1.68335 au 
 Jupiter MOID = 1.75731 au 
 T_jup = 3.235 
[ 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 16.90   n/a MPCxxxxx  

541288 (2011 ET81)          Discovered 2005-Dec-02 by Wasserman, L. H., Millis, R. L. at Kitt Peak
Reference: Last Updated: 2019-12-13

[ show close-approach data ]
Alternate Designations
 2011 ET81 = 2009 WW121 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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