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17487 (1991 SY)
Classification: Main-belt Asteroid          SPK-ID: 2017487
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 .1262762565492825 7.0951e-08  
a 2.683497262164413 2.3981e-08 AU
q 2.344635273438043 1.8811e-07 AU
i 13.64672733482136 8.4312e-06 deg
node 28.82571792846317 2.3325e-05 deg
peri 207.2048467537223 3.4822e-05 deg
M 198.052789940797 2.6386e-05 deg
tp 2457722.805848781560
(2016-Nov-30.30584878)
0.00011873 JED
period 1605.64733079565
4.40
2.1523e-05
5.893e-08
d
yr
n .2242086372862517 3.0054e-09 deg/d
Q 3.022359250890784 2.7009e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      795  
   data-arc span      12351 days (33.82 yr)  
   first obs. used      1981-03-29  
   last obs. used      2015-01-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50591  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:48:59  

Additional Information
 Earth MOID = 1.34407 AU 
 T_jup = 3.324 
[ 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 13.3 mag n/a MPO319304  

17487 (1991 SY)          Discovered 1991-Sep-30 by McNaught, R. H. at Siding Spring
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 SY = 1981 FF1 = 1990 HR4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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