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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1778037461560386 6.5622e-08  
a 2.688259089576964 2.9797e-08 AU
q 2.210276552812158 1.8682e-07 AU
i 12.29075636876889 1.4506e-05 deg
node 328.0134171974831 3.4791e-05 deg
peri 104.7841021571579 5.702e-05 deg
M 337.4247229458579 4.4752e-05 deg
tp 2456901.456828582739
(2014-Aug-31.95682858)
0.00020074 JED
period 1609.923023430521
4.41
2.6767e-05
7.328e-08
d
yr
n .2236131757609691 3.7178e-09 deg/d
Q 3.166241626341771 3.5095e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      659  
   data-arc span      9567 days (26.19 yr)  
   first obs. used      1987-09-25  
   last obs. used      2013-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53033  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 21:35:49  

Additional Information
 Earth MOID = 1.26161 AU 
 T_jup = 3.318 
[ 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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