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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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1780646907486252 5.8719e-08  
a 2.689096869708476 2.0696e-08 AU
q 2.210263667210741 1.6034e-07 AU
i 12.29102685367329 1.0782e-05 deg
node 328.0107643076045 2.9139e-05 deg
peri 104.8065667728283 4.9114e-05 deg
M 22.12288655982105 3.2787e-05 deg
tp 2456901.520013729612
(2014-Sep-01.02001373)
0.00014696 JED
period 1610.67566662187
4.41
1.8595e-05
5.091e-08
d
yr
n .2235086848707669 2.5803e-09 deg/d
Q 3.167930072206212 2.4382e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      720  
   data-arc span      9987 days (27.34 yr)  
   first obs. used      1987-09-25  
   last obs. used      2015-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52381  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:46:28  

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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