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120906 (1998 SL39)
Classification: Main-belt Asteroid          SPK-ID: 2120906
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1080363622939878 5.5324e-08  
a 3.05660288602136 2.6497e-08 au
q 2.726378629238308 1.7122e-07 au
i 1.388792654915019 6.5249e-06 deg
node 168.6083667409802 0.00018425 deg
peri 339.8716638956874 0.00018569 deg
M 232.1837574964797 2.5482e-05 deg
tp 2459693.511594241234
(2022-Apr-24.01159424)
0.00014295 TDB
period 1951.897263135184
5.34
2.5381e-05
6.949e-08
d
yr
n .1844359366649038 2.3983e-09 deg/d
Q 3.386827142804412 2.936e-08 au
  Orbit Determination Parameters
   # obs. used (total)      420  
   data-arc span      7663 days (20.98 yr)  
   first obs. used      1998-09-13  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53889  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:18:53  

Additional Information
 Earth MOID = 1.73781 au 
 Jupiter MOID = 1.61345 au 
 T_jup = 3.226 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO453679  

120906 (1998 SL39)          Discovered 1998-Sep-23 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 SL39 = 2004 TU54 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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