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227803 (2007 AD21)
Classification: Main-belt Asteroid          SPK-ID: 2227803
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06770158263371755 3.7354e-08  
a 2.315710174280588 1.2526e-08 au
q 2.158932930560791 8.9436e-08 au
i 5.513157874264797 5.384e-06 deg
node 304.6511729020934 4.0564e-05 deg
peri 261.9075276757454 5.993e-05 deg
M 276.0760486673125 4.5943e-05 deg
tp 2459500.560034594007
(2021-Oct-13.06003459)
0.00016495 TDB
period 1287.136874974205
3.52
1.0444e-05
2.859e-08
d
yr
n .2796905340834203 2.2694e-09 deg/d
Q 2.472487418000386 1.3374e-08 au
  Orbit Determination Parameters
   # obs. used (total)      468  
   data-arc span      7686 days (21.04 yr)  
   first obs. used      2000-02-04  
   last obs. used      2021-02-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52853  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 00:41:13  

Additional Information
 Earth MOID = 1.16181 au 
 Jupiter MOID = 2.51612 au 
 T_jup = 3.572 
[ 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 16.5   n/a MPO440187  

227803 (2007 AD21)          Discovered 2007-Jan-10 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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