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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1790234655623686 5.4374e-08  
a 2.687714081842354 1.8563e-08 au
q 2.206550192470156 1.4563e-07 au
i 12.28910099385286 9.0694e-06 deg
node 327.9957562808759 2.6722e-05 deg
peri 104.5504756369734 3.929e-05 deg
M 156.4554577892375 2.4923e-05 deg
tp 2456901.042640814033
(2014-Aug-31.54264081)
0.00011159 JED
period 1609.433463459974
4.41
1.6673e-05
4.565e-08
d
yr
n .2236811947640687 2.3173e-09 deg/d
Q 3.168877971214552 2.1886e-08 au
  Orbit Determination Parameters
   # obs. used (total)      913  
   data-arc span      10431 days (28.56 yr)  
   first obs. used      1987-09-25  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51014  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:25:20  

Additional Information
 Earth MOID = 1.25721 au 
 Jupiter MOID = 2.18819 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 13.5 mag n/a MPO337399  
rotation period rot_per 4.8 h n/a LCDB (Rev. 2016-February); 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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