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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09997910774544891 5.6562e-08  
a 5.139324405484528 1.0213e-07 au
q 4.625499337009775 3.4105e-07 au
i 16.92886590461419 6.1407e-06 deg
node 32.1530966814503 1.4669e-05 deg
peri 217.6509689368238 3.4692e-05 deg
M 357.4872655969016 2.811e-05 deg
tp 2459230.203085155382
(2021-Jan-15.70308516)
0.00033196 TDB
period 4255.567418009672
11.65
0.00012685
3.473e-07
d
yr
n .08459506445050563 2.5216e-09 deg/d
Q 5.653149473959281 1.1234e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1043  
   data-arc span      11664 days (31.93 yr)  
   first obs. used      1988-09-15  
   last obs. used      2020-08-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53732  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:02:51  

Additional Information
 Earth MOID = 3.62884 au 
 Jupiter MOID = .519578 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 11.84   n/a E2021B10  
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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