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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1788109090244656 5.7511e-08  
a 2.688550545970679 2.0549e-08 au
q 2.207808378887439 1.5662e-07 au
i 12.28972304074029 1.0619e-05 deg
node 328.0038220778434 2.7718e-05 deg
peri 104.6316019141607 4.788e-05 deg
M 111.6298611662176 3.2053e-05 deg
tp 2456901.209135977409
(2014-Aug-31.70913598)
0.00014482 JED
period 1610.184848124926
4.41
1.8461e-05
5.054e-08
d
yr
n .223576815058981 2.5633e-09 deg/d
Q 3.169292713053919 2.4224e-08 au
  Orbit Determination Parameters
   # obs. used (total)      887  
   data-arc span      10105 days (27.67 yr)  
   first obs. used      1987-09-25  
   last obs. used      2015-05-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50079  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:26:40  

Additional Information
 Earth MOID = 1.25937 au 
 Jupiter MOID = 2.18832 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 13.5 mag n/a MPO337399  
rotation period rot_per 4.8 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Behrend, R. (2015) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

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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