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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03264283720946541 1.7278e-07  
a 2.58313629520706 4.7323e-08 AU
q 2.498815397632754 4.1813e-07 AU
i 21.92792995097587 1.6054e-05 deg
node 327.8414592437657 2.4625e-05 deg
peri 162.581420426911 0.00019069 deg
M 244.5597885984465 0.00019655 deg
tp 2457286.766131532202
(2015-Sep-21.26613153)
0.00083404 JED
period 1516.419670635123
4.15
4.1671e-05
1.141e-07
d
yr
n .2374012992387661 6.5238e-09 deg/d
Q 2.667457192781365 4.8868e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      419  
   data-arc span      6767 days (18.53 yr)  
   first obs. used      1995-03-04  
   last obs. used      2013-09-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56286  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Sep-24 03:06:35  

Additional Information
 Earth MOID = 1.51414 AU 
 T_jup = 3.321 
[ 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 13.7 mag n/a MPO267809  

28231 (1999 AL5)          Discovered 1999-Jan-10 by Shimizu, Y., Urata, T. at Nachi-Katsuura (905)
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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