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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1780646926545831 5.8345e-08  
a 2.689096868489602 2.0336e-08 AU
q 2.210263661083599 1.5897e-07 AU
i 12.2910258558915 1.0623e-05 deg
node 328.0107592631462 2.8206e-05 deg
peri 104.8065702326042 4.8415e-05 deg
M 22.12288852356357 3.2468e-05 deg
tp 2456901.520005010929
(2014-Sep-01.02000501)
0.00014556 JED
period 1610.675665526775
4.41
1.827e-05
5.002e-08
d
yr
n .2235086850227301 2.5353e-09 deg/d
Q 3.167930075895604 2.3957e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      855  
   data-arc span      10039 days (27.49 yr)  
   first obs. used      1987-09-25  
   last obs. used      2015-03-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49468  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:55:48  

Additional Information
 Earth MOID = 1.26203 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 13.4 mag n/a MPO267771  

16539 (1991 PY12)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
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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