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39795 (1997 SF28)
Classification: Jupiter Trojan          SPK-ID: 2039795
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09678985698941413 6.2789e-08  
a 5.162908546867789 1.2375e-07 au
q 4.663191366967032 4.0868e-07 au
i 6.735038336697386 7.8769e-06 deg
node 344.8606008541876 3.97e-05 deg
peri 79.9174045046061 5.6687e-05 deg
M 339.6689633470783 4.0377e-05 deg
tp 2459638.489820704184
(2022-Feb-27.98982070)
0.00048258 TDB
period 4284.89392551397
11.73
0.00015406
4.218e-07
d
yr
n .08401608213832697 3.0207e-09 deg/d
Q 5.662625726768546 1.3573e-07 au
  Orbit Determination Parameters
   # obs. used (total)      472  
   data-arc span      8474 days (23.20 yr)  
   first obs. used      1997-09-30  
   last obs. used      2020-12-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5403  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 08:45:06  

Additional Information
 Earth MOID = 3.68467 au 
 Jupiter MOID = .0930456 au 
 T_jup = 2.977 
[ 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 12.54   n/a E2021B10  
diameter diameter 18.342 km 0.742 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
geometric albedo albedo 0.052   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

39795 (1997 SF28)          Discovered 1997-Sep-30 by Spacewatch at Kitt Peak
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 SF28 = 1999 AF5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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