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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0327268452947533 1.4528e-07  
a 2.582919726545491 4.0504e-08 AU
q 2.498388912246071 3.5273e-07 AU
i 21.92813551893886 1.4403e-05 deg
node 327.8420496149831 2.2976e-05 deg
peri 162.7249824543379 0.00017244 deg
M 291.9078564510083 0.00017624 deg
tp 2457287.286890962902
(2015-Sep-21.78689096)
0.00074475 JED
period 1516.228971002537
4.15
3.5665e-05
9.765e-08
d
yr
n .2374311577505121 5.5849e-09 deg/d
Q 2.667450540844912 4.183e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      7052 days (19.31 yr)  
   first obs. used      1995-03-04  
   last obs. used      2014-06-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5597  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:58:35  

Additional Information
 Earth MOID = 1.51398 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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