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17421 (1988 SW1)
Classification: Jupiter Trojan          SPK-ID: 2017421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0999004059324894 5.6904e-08  
a 5.139169619038999 1.0287e-07 au
q 4.625764487941087 3.4325e-07 au
i 16.9291027318943 6.2289e-06 deg
node 32.15372515039795 1.5157e-05 deg
peri 217.5025959764557 3.5094e-05 deg
M 340.6870207428995 2.8641e-05 deg
tp 2459228.788811943229
(2021-Jan-14.28881194)
0.00033606 TDB
period 4255.375165348828
11.65
0.00012776
3.498e-07
d
yr
n .08459888635235985 2.54e-09 deg/d
Q 5.652574750136913 1.1314e-07 au
  Orbit Determination Parameters
   # obs. used (total)      987  
   data-arc span      11598 days (31.75 yr)  
   first obs. used      1988-09-15  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54369  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 18:09:47  

Additional Information
 Earth MOID = 3.63041 au 
 Jupiter MOID = .519186 au 
 T_jup = 2.904 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 11.8   n/a MPO279698  
diameter diameter 23.785 km 0.679 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.072   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

17421 (1988 SW1)          Discovered 1988-Sep-16 by Bus, S. J. at Cerro Tololo
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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