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28231 (1999 AL5)
Classification: Main-belt Asteroid          SPK-ID: 2028231
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03339281112458174 1.0146e-07  
a 2.584603452047774 2.866e-08 au
q 2.498296277141601 2.5732e-07 au
i 21.92531759448666 1.2023e-05 deg
node 327.8419963328693 2.2061e-05 deg
peri 162.2343230702704 0.00014933 deg
M 27.31701110555377 0.00014745 deg
tp 2457285.335139627848
(2015-Sep-19.83513963)
0.00062164 JED
period 1517.711786760807
4.16
2.5244e-05
6.911e-08
d
yr
n .2371991857349504 3.9453e-09 deg/d
Q 2.670910626953948 2.9617e-08 au
  Orbit Determination Parameters
   # obs. used (total)      482  
   data-arc span      7594 days (20.79 yr)  
   first obs. used      1995-03-04  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54375  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 14:06:07  

Additional Information
 Earth MOID = 1.51376 au 
 Jupiter MOID = 2.35795 au 
 T_jup = 3.320 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO358893  

28231 (1999 AL5)          Discovered 1999-Jan-10 by Shimizu, Y., Urata, T. at Nachi-Katsuura
Reference: 20010902/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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