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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 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1262762525395592 7.7119e-08  
a 2.683497260793648 2.6965e-08 AU
q 2.344635283000454 2.0083e-07 AU
i 13.64673039329019 9.3413e-06 deg
node 28.82571238461419 2.4694e-05 deg
peri 207.2048540030328 3.9988e-05 deg
M 198.0527885550382 2.9629e-05 deg
tp 2457722.805854408782
(2016-Nov-30.30585441)
0.00013091 JED
period 1605.647329565371
4.40
2.4202e-05
6.626e-08
d
yr
n .2242086374580448 3.3795e-09 deg/d
Q 3.022359238586841 3.0371e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      762  
   data-arc span      12273 days (33.60 yr)  
   first obs. used      1981-03-29  
   last obs. used      2014-11-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50999  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Nov-10 13:29:23  

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 13.2 mag n/a MPO266048  

17487 (1991 SY)          Discovered 1991-Sep-30 by McNaught, R. H. at Siding Spring (413)
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

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