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101566 (1999 AO21)
Classification: Main-belt Asteroid          SPK-ID: 2101566
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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1856168552968958 3.9045e-08  
a 2.654375236114994 1.2978e-08 au
q 2.161678452009374 1.0418e-07 au
i 6.575122606103899 4.1502e-06 deg
node 158.16144468 4.0038e-05 deg
peri 35.92029882497785 4.1608e-05 deg
M 332.2145327350291 1.1917e-05 deg
tp 2459322.414989674598
(2021-Apr-17.91498967)
5.2628e-05 TDB
period 1579.581004138326
4.32
1.1585e-05
3.172e-08
d
yr
n .2279085397056816 1.6715e-09 deg/d
Q 3.147072020220615 1.5387e-08 au
  Orbit Determination Parameters
   # obs. used (total)      719  
   data-arc span      10398 days (28.47 yr)  
   first obs. used      1992-09-25  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57027  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:37:24  

Additional Information
 Earth MOID = 1.16489 au 
 Jupiter MOID = 1.81432 au 
 T_jup = 3.355 
[ 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 15.49   n/a E2021B55  

101566 (1999 AO21)          Discovered 1999-Jan-14 by Korlevic, K. at Visnjan
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1999 AO21 = 2004 LM11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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