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16539 (1991 PY12)
Classification: Main-belt Asteroid          SPK-ID: 2016539
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1778089741237245 7.143e-08  
a 2.689103382416799 3.4221e-08 AU
q 2.21095666867663 1.9432e-07 AU
i 12.2891478312818 1.4725e-05 deg
node 328.0134889349107 4.1738e-05 deg
peri 104.6809931156698 6.3227e-05 deg
M 248.0984030791015 4.4567e-05 deg
tp 2456901.160649972517
(2014-Aug-31.66064997)		 0.00020137 JED
period 1610.681517954685
4.41		 3.0745e-05
8.418e-08		 d
yr
n .2235078729016174 4.2664e-09 deg/d
Q 3.167250096156968 4.0305e-08 AU
   Orbit Determination Parameters
   # obs. used (total)      627  
   data-arc span      9335 days (25.56 yr)  
   first obs. used      1987-09-25  
   last obs. used      2013-04-16  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .54604  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 14:03:26  

Additional Information
 Earth MOID = 1.2624 AU 
 T_jup = 3.317 
[ 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 13.2 mag n/a PDS3 (MPO 2863)  

16539 (1991 PY12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675)
Reference: 20000913/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 PY12 = 1987 SP16 = 1993 BM2 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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