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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1255126751986703 5.9834e-08  
a 2.685126649519043 2.0163e-08 au
q 2.348109220490666 1.6502e-07 au
i 13.65115338347622 7.1215e-06 deg
node 28.7787211232361 2.1771e-05 deg
peri 206.8527501642705 3.3234e-05 deg
M 332.8447162281446 2.6094e-05 deg
tp 2457721.726462988815
(2016-Nov-29.22646299)
0.00011668 JED
period 1607.109947464621
4.40
1.8102e-05
4.956e-08
d
yr
n .224004586971748 2.5231e-09 deg/d
Q 3.022144078547421 2.2694e-08 au
  Orbit Determination Parameters
   # obs. used (total)      963  
   data-arc span      12800 days (35.04 yr)  
   first obs. used      1981-03-29  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49413  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:27:41  

Additional Information
 Earth MOID = 1.34563 au 
 Jupiter MOID = 1.98376 au 
 T_jup = 3.323 
[ 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

[ 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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