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120725 (1997 SL18)
Classification: Main-belt Asteroid          SPK-ID: 2120725
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1707075480016112 4.0553e-08  
a 2.3450848317814 1.0889e-08 au
q 1.944761150292227 9.6271e-08 au
i 5.985355026891246 6.4284e-06 deg
node 348.5551287204941 4.2802e-05 deg
peri 92.82320426846317 4.7837e-05 deg
M 97.82249883162183 1.8572e-05 deg
tp 2458844.071424396860
(2019-Dec-26.57142440)		 6.7568e-05 TDB
period 1311.705269745693
3.59		 9.1359e-06
2.501e-08		 d
yr
n .2744518973151606 1.9115e-09 deg/d
Q 2.745408513270574 1.2748e-08 au
   Orbit Determination Parameters
   # obs. used (total)      485  
   data-arc span      8225 days (22.52 yr)  
   first obs. used      1997-08-11  
   last obs. used      2020-02-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5319  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:55:15  

Additional Information
 Earth MOID = .971032 au 
 Jupiter MOID = 2.49957 au 
 T_jup = 3.535 
[ 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 16.68   n/a E2021B55  

120725 (1997 SL18)          Discovered 1997-Sep-28 by Spacewatch at Kitt Peak
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1997 SL18 = 2001 TE39 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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