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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0996258341311884 6.0328e-08  
a 5.139264106182578 1.1962e-07 au
q 4.627260632783663 3.7696e-07 au
i 16.92847105935166 6.6741e-06 deg
node 32.15449195270937 2.2587e-05 deg
peri 217.2623357789145 4.6463e-05 deg
M 307.033320886978 4.2739e-05 deg
tp 2459226.609185905583
(2021-Jan-12.10918591)
0.00050838 TDB
period 4255.492522856602
11.65
0.00014858
4.068e-07
d
yr
n .08459655329351662 2.9537e-09 deg/d
Q 5.651267579581494 1.3154e-07 au
  Orbit Determination Parameters
   # obs. used (total)      743  
   data-arc span      11193 days (30.64 yr)  
   first obs. used      1988-09-15  
   last obs. used      2019-05-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57495  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 02:30:53  

Additional Information
 Earth MOID = 3.63162 au 
 Jupiter MOID = .519296 au 
 T_jup = 2.905 
[ 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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