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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03272684586330746 1.398e-07  
a 2.582919726733324 3.9078e-08 AU
q 2.498388910959226 3.4058e-07 AU
i 21.92813600009175 1.4205e-05 deg
node 327.842049810125 2.2946e-05 deg
peri 162.7249823369827 0.00016976 deg
M 291.9078563069984 0.00017287 deg
tp 2457287.286891600718
(2015-Sep-21.78689160)
0.00073026 JED
period 1516.228971167929
4.15
3.4409e-05
9.421e-08
d
yr
n .2374311577246128 5.3883e-09 deg/d
Q 2.667450542507421 4.0357e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      424  
   data-arc span      7169 days (19.63 yr)  
   first obs. used      1995-03-04  
   last obs. used      2014-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .558  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:52:40  

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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