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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1780646802253683 6.467e-08  
a 2.689096877658844 2.7719e-08 AU
q 2.210263702043486 1.829e-07 AU
i 12.2910329242801 1.3867e-05 deg
node 328.0107734955893 3.4336e-05 deg
peri 104.8065675430087 5.5427e-05 deg
M 22.12287368014126 4.2118e-05 deg
tp 2456901.520070915621
(2014-Sep-01.02007092)
0.00018802 JED
period 1610.675673764862
4.41
2.4904e-05
6.818e-08
d
yr
n .2235086838795552 3.4559e-09 deg/d
Q 3.167930053274202 3.2655e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      671  
   data-arc span      9892 days (27.08 yr)  
   first obs. used      1987-09-25  
   last obs. used      2014-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53933  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:27:12  

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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