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JPL Small-Body Database Browser
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39797 (1997 TK18)
Classification: Jupiter Trojan          SPK-ID: 2039797
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08118332965636105 7.246e-08  
a 5.171131612661361 1.2777e-07 au
q 4.751321930254243 3.6276e-07 au
i 14.98062926883277 7.4962e-06 deg
node 27.22613931303493 2.3365e-05 deg
peri 125.8717665426792 4.861e-05 deg
M 164.0020977808286 4.3475e-05 deg
tp 2456643.802382011271
(2013-Dec-17.30238201)
0.00048504 TDB
period 4295.134952586479
11.76
0.00015919
4.358e-07
d
yr
n .08381575991767436 3.1064e-09 deg/d
Q 5.590941295068478 1.3814e-07 au
  Orbit Determination Parameters
   # obs. used (total)      410  
   data-arc span      10420 days (28.53 yr)  
   first obs. used      1991-03-15  
   last obs. used      2019-09-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59556  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 05:49:08  

Additional Information
 Earth MOID = 3.7856 au 
 Jupiter MOID = .444318 au 
 T_jup = 2.926 
[ 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 12.2   n/a MPO452720  
rotation period rot_per 7.661 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

39797 (1997 TK18)          Discovered 1997-Oct-03 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1997 TK18 = 1999 XB208 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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