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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1780646877801929 6.0609e-08  
a 2.689096871835273 2.293e-08 AU
q 2.210263676941232 1.6751e-07 AU
i 12.2910257897113 1.2005e-05 deg
node 328.0107609876798 3.1898e-05 deg
peri 104.8065719530182 5.1513e-05 deg
M 22.12288378194829 3.5387e-05 deg
tp 2456901.520026040665
(2014-Sep-01.02002604)
0.00015837 JED
period 1610.675668532686
4.41
2.0602e-05
5.641e-08
d
yr
n .2235086846056086 2.8588e-09 deg/d
Q 3.167930066729314 2.7013e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      686  
   data-arc span      9957 days (27.26 yr)  
   first obs. used      1987-09-25  
   last obs. used      2014-12-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5356  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:31:53  

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 (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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