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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08220018961414215 9.9684e-08  
a 5.170130826623596 1.5991e-07 au
q 4.745145092345215 5.2389e-07 au
i 14.98443913604602 1.2014e-05 deg
node 27.25165943099876 3.1051e-05 deg
peri 126.0321835321617 9.152e-05 deg
M 63.08581369881917 7.8155e-05 deg
tp 2456648.046036203025
(2013-Dec-21.54603620)
0.00093502 JED
period 4293.888135613943
11.76
0.00019922
5.454e-07
d
yr
n .08384009751304967 3.8898e-09 deg/d
Q 5.595116560901977 1.7306e-07 au
  Orbit Determination Parameters
   # obs. used (total)      356  
   data-arc span      8835 days (24.19 yr)  
   first obs. used      1991-03-15  
   last obs. used      2015-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55484  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:24:03  

Additional Information
 Earth MOID = 3.77894 au 
 Jupiter MOID = .447966 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. 2015-December); 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 | Physical Parameters | Discovery Circumstances ]
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