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JPL Small-Body Database Browser
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379549 (2011 AT21)
Classification: Main-belt Asteroid          SPK-ID: 2379549
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .122486236983802 5.211e-08  
a 2.278190744788311 1.8983e-08 au
q 1.999143733327865 1.1812e-07 au
i 3.667984124173053 5.5974e-06 deg
node 94.78169227049257 0.00010691 deg
peri 2.343531345253683 0.00011081 deg
M 165.017481957018 3.0326e-05 deg
tp 2458024.780410956846
(2017-Sep-28.28041096)
0.00010312 TDB
period 1255.982394092767
3.44
1.5698e-05
4.298e-08
d
yr
n .2866282216161467 3.5826e-09 deg/d
Q 2.557237756248756 2.1309e-08 au
  Orbit Determination Parameters
   # obs. used (total)      162  
   data-arc span      5187 days (14.20 yr)  
   first obs. used      2003-12-14  
   last obs. used      2018-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61169  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Mar-06 02:01:36  

Additional Information
 Earth MOID = 1.01608 au 
 Jupiter MOID = 2.57964 au 
 T_jup = 3.595 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.7   n/a MPO437555  

379549 (2011 AT21)          Discovered 2008-Mar-10 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2013-11-20

Alternate Designations
 2011 AT21 = 2008 EU156 = 2008 GD120 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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