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39797 (1997 TK18)
Classification: Jupiter Trojan          SPK-ID: 2039797
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08200210180951284 9.3553e-08  
a 5.170260898515844 1.5778e-07 au
q 4.746288637934004 4.8364e-07 au
i 14.98334803887614 1.1687e-05 deg
node 27.2494416833658 2.9744e-05 deg
peri 126.0999955855882 8.6799e-05 deg
M 79.81217020029054 7.444e-05 deg
tp 2456648.507045566832
(2013-Dec-22.00704557)
0.00088926 JED
period 4294.050177258468
11.76
0.00019656
5.382e-07
d
yr
n .08383693369643891 3.8377e-09 deg/d
Q 5.594233159097684 1.7072e-07 au
  Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      9160 days (25.08 yr)  
   first obs. used      1991-03-15  
   last obs. used      2016-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55243  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 14:15:13  

Additional Information
 Earth MOID = 3.77897 au 
 Jupiter MOID = .447538 au 
 T_jup = 2.926 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.3 mag n/a MPO337580  
rotation period rot_per 7.6607 h n/a LCDB (Rev. 2016-February); 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. (2016) 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 | Physical Parameters | Discovery Circumstances ]
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