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17487 (1991 SY)
Classification: Main-belt Asteroid          SPK-ID: 2017487
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1247783089780575 2.5976e-08  
a 2.684227820898859 1.2283e-08 au
q 2.349294412495243 7.3578e-08 au
i 13.65001003743838 7.0835e-07 deg
node 28.75871926765663 3.7082e-06 deg
peri 207.3052871551782 6.6972e-06 deg
M 330.8644378465425 8.17e-06 deg
tp 2459330.501507391353
(2021-Apr-26.00150739)
3.6811e-05 TDB
period 1606.303060651032
4.40
1.1026e-05
3.019e-08
d
yr
n .2241171101635657 1.5383e-09 deg/d
Q 3.019161229302474 1.3816e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1947  
   data-arc span      14603 days (39.98 yr)  
   first obs. used      1981-03-29  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .4487  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:33:36  

Additional Information
 Earth MOID = 1.34599 au 
 Jupiter MOID = 1.98733 au 
 T_jup = 3.323 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.49   n/a E2021B10  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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