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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1258851239098552 7.0379e-08  
a 2.685480367311077 2.3532e-08 au
q 2.347418338514638 1.8738e-07 au
i 13.64677566346365 8.3136e-06 deg
node 28.79332347575775 2.3252e-05 deg
peri 206.9058902040085 3.4591e-05 deg
M 288.0233476804679 2.6387e-05 deg
tp 2457721.881254872290
(2016-Nov-29.38125487)
0.00011847 JED
period 1607.427520251981
4.40
2.1128e-05
5.785e-08
d
yr
n .2239603313146998 2.9437e-09 deg/d
Q 3.023542396107515 2.6494e-08 au
  Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      12673 days (34.70 yr)  
   first obs. used      1981-03-29  
   last obs. used      2015-12-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51188  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:37:00  

Additional Information
 Earth MOID = 1.34448 au 
 Jupiter MOID = 1.98195 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

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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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