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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1231365043330916 5.2251e-08  
a 2.276659222437025 1.8827e-08 au
q 1.996319364228435 1.1849e-07 au
i 3.66823996536469 5.5998e-06 deg
node 94.78101736820075 0.00010693 deg
peri 2.5673857730652 0.00011077 deg
M 279.4963493529983 3.0728e-05 deg
tp 2459281.081184617450
(2021-Mar-07.58118462)
0.0001087 TDB
period 1254.716098592777
3.44
1.5564e-05
4.261e-08
d
yr
n .2869174950443028 3.5591e-09 deg/d
Q 2.556999080645615 2.1146e-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 = 1.01317 au 
 Jupiter MOID = 2.57814 au 
 T_jup = 3.596 
[ 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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