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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03994146237405052 1.1374e-07  
a 2.77644476040916 5.6415e-08 au
q 2.665549496477648 3.1661e-07 au
i 6.805542688716439 1.2065e-05 deg
node 143.7203669509574 6.7991e-05 deg
peri 218.8829596219165 0.00012824 deg
M 257.7309341230889 0.00011269 deg
tp 2459080.535958971843
(2020-Aug-19.03595897)
0.00053594 TDB
period 1689.787070489699
4.63
5.1503e-05
1.41e-07
d
yr
n .2130445937757544 6.4934e-09 deg/d
Q 2.887340024340673 5.8669e-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 = 1.66355 au 
 Jupiter MOID = 2.30125 au 
 T_jup = 3.324 
[ 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 = 2.30125 au 
 T_jup = 3.324 
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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