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392016 (2009 AK21)
Classification: Main-belt Asteroid          SPK-ID: 2392016
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1307644470589903 5.761e-08  
a 2.742596204755694 5.2917e-08 au
q 2.383962128534731 1.5451e-07 au
i 6.180856114461862 6.3943e-06 deg
node 81.89397838955027 7.3607e-05 deg
peri 358.8251219285732 8.6875e-05 deg
M 203.0680688972047 5.4111e-05 deg
tp 2459723.686068154045
(2022-May-24.18606815)
0.00026619 TDB
period 1658.980315261149
4.54
4.8013e-05
1.315e-07
d
yr
n .2170007664878956 6.2803e-09 deg/d
Q 3.101230280976659 5.9836e-08 au
  Orbit Determination Parameters
   # obs. used (total)      111  
   data-arc span      3815 days (10.44 yr)  
   first obs. used      2008-12-22  
   last obs. used      2019-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:41:52  

Additional Information
 Earth MOID = 1.39975 au 
 Jupiter MOID = 2.1265 au 
 T_jup = 3.328 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457681.5 (2016-Oct-20.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .132946281217064 5.7931e-08  
q 2.37476679150463 1.5609e-07 au
tp 2458064.482845195639
(2017-Nov-06.98284520)
0.00022444 TDB
node 81.90099338667981 7.3592e-05 deg
peri 358.4389491946854 8.644e-05 deg
i 6.184655832046045 6.4045e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      111  
   data-arc span      3815 days (10.44 yr)  
   first obs. used      2008-12-22  
   last obs. used      2019-06-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57165  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 04:41:52  

Additional Information
 Jupiter MOID = 2.1265 au 
 T_jup = 3.328 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.355961353620287E-15 -8.666301432456567E-15 -1.197042148678395E-12 1.791784345404868E-14 -3.304934201962432E-13 1.789947599277465E-15
q -8.666301432456567E-15 2.436497892875991E-14 1.087380839968049E-11 -9.578442111687479E-14 2.379531599357145E-12 -1.093264117063372E-15
tp -1.197042148678395E-12 1.087380839968049E-11 5.037373633380984E-8 -3.044353610343944E-10 1.026638949543457E-8 1.837522715344609E-11
node 1.791784345404868E-14 -9.578442111687479E-14 -3.044353610343944E-10 5.415814096156218E-9 -5.444553088431417E-9 -1.62444298951639E-10
peri -3.304934201962432E-13 2.379531599357145E-12 1.026638949543457E-8 -5.444553088431417E-9 7.471899066686024E-9 1.650717094138462E-10
i 1.789947599277465E-15 -1.093264117063372E-15 1.837522715344609E-11 -1.62444298951639E-10 1.650717094138462E-10 4.101710614805573E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.8   n/a MPO476847  

392016 (2009 AK21)          Discovered 2008-Dec-22 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-04-17
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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