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442804 (2013 AJ28)
Classification: Main-belt Asteroid          SPK-ID: 2442804
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0390288648833105 1.131e-07  
a 2.773455348369254 5.6113e-08 au
q 2.665210534317855 3.1391e-07 au
i 6.811928341324014 1.2076e-05 deg
node 143.673863602769 6.7898e-05 deg
peri 220.1492643216981 0.00013163 deg
M 341.7438534383907 0.00011786 deg
tp 2459086.053308109532
(2020-Aug-24.55330811)
0.00055356 TDB
period 1687.058701872988
4.62
5.1199e-05
1.402e-07
d
yr
n .2133891367267332 6.476e-09 deg/d
Q 2.881700162420652 5.8303e-08 au
  Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      4691 days (12.84 yr)  
   first obs. used      2005-06-08  
   last obs. used      2018-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47258  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 06:32:53  

Additional Information
 Earth MOID = 1.66458 au 
 Jupiter MOID = 2.3005 au 
 T_jup = 3.325 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457203.5 (2015-Jun-30.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04164833585038959 1.1355e-07  
q 2.658892223910357 3.1624e-07 au
tp 2457396.870673885102
(2016-Jan-09.37067389)
0.00049449 TDB
node 143.8131110021781 6.799e-05 deg
peri 219.8277263244373 0.00012497 deg
i 6.807078272909504 1.2072e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      100  
   data-arc span      4691 days (12.84 yr)  
   first obs. used      2005-06-08  
   last obs. used      2018-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47258  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 06:32:53  

Additional Information
 Jupiter MOID = 2.3005 au 
 T_jup = 3.325 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.289260645098388E-14 -3.539361809301345E-14 -1.654901121183263E-11 -3.971670794450873E-14 -3.372122182536302E-12 -7.008878392870101E-15
q -3.539361809301345E-14 1.000093712869902E-13 5.661078346094775E-11 1.128287615615107E-13 1.1573002075324E-11 2.163387078315166E-14
tp -1.654901121183263E-11 5.661078346094775E-11 2.445234050508828E-7 1.575328125532859E-11 5.190352553423231E-8 -1.440396409774752E-12
node -3.971670794450873E-14 1.128287615615107E-13 1.575328125532859E-11 4.62268934666016E-9 -4.586128633240552E-9 2.711856325789832E-10
peri -3.372122182536302E-12 1.1573002075324E-11 5.190352553423231E-8 -4.586128633240552E-9 1.561729668451155E-8 -2.697596195071789E-10
i -7.008878392870101E-15 2.163387078315166E-14 -1.440396409774752E-12 2.711856325789832E-10 -2.697596195071789E-10 1.457283976773755E-10

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.6   n/a MPO437722  

442804 (2013 AJ28)          Discovered 2005-Jun-08 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02

Alternate Designations
 2013 AJ28 = 2005 LO31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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