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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1706932404850907 4.0571e-08  
a 2.345436262357979 1.0876e-08 au
q 1.945086146384856 9.6312e-08 au
i 5.98493497102915 6.4379e-06 deg
node 348.5553300511218 4.2809e-05 deg
peri 92.87706885085848 4.7848e-05 deg
M 42.88853382764499 1.8575e-05 deg
tp 2458844.195104982855
(2019-Dec-26.69510498)
6.7659e-05 TDB
period 1312.000135800909
3.59
9.1261e-06
2.499e-08
d
yr
n .2743902155011886 1.9086e-09 deg/d
Q 2.745786378331102 1.2733e-08 au
  Orbit Determination Parameters
   # obs. used (total)      481  
   data-arc span      8200 days (22.45 yr)  
   first obs. used      1997-08-11  
   last obs. used      2020-01-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53371  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:22:19  

Additional Information
 Earth MOID = .971731 au 
 Jupiter MOID = 2.49894 au 
 T_jup = 3.534 
[ 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 16.6   n/a MPO502802  

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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