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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0327269285956894 1.0203e-07  
a 2.582919748471045 2.9415e-08 AU
q 2.498388718294437 2.5829e-07 AU
i 21.92813040041223 1.2044e-05 deg
node 327.8420462397971 2.241e-05 deg
peri 162.7250544220493 0.0001527 deg
M 291.9077779355723 0.00015129 deg
tp 2457287.287225301728
(2015-Sep-21.78722530)
0.00063734 JED
period 1516.228990308688
4.15
2.59e-05
7.091e-08
d
yr
n .2374311547273 4.0558e-09 deg/d
Q 2.667450778647653 3.0377e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      446  
   data-arc span      7262 days (19.88 yr)  
   first obs. used      1995-03-04  
   last obs. used      2015-01-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55458  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 14:17:37  

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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