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129709 (1998 SW157)
Classification: Main-belt Asteroid          SPK-ID: 2129709
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1310475275789879 4.5253e-08  
a 2.918855732423565 2.0016e-08 au
q 2.536346905329701 1.294e-07 au
i 3.609208065316786 4.2489e-06 deg
node 248.3228221112596 9.1352e-05 deg
peri 168.9860424828123 9.4647e-05 deg
M 85.49079844555786 2.3919e-05 deg
tp 2458567.952063636560
(2019-Mar-25.45206364)
0.00012061 TDB
period 1821.450494347672
4.99
1.8736e-05
5.13e-08
d
yr
n .1976446799499369 2.033e-09 deg/d
Q 3.301364559517429 2.2639e-08 au
  Orbit Determination Parameters
   # obs. used (total)      526  
   data-arc span      7878 days (21.57 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59395  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 21:46:35  

Additional Information
 Earth MOID = 1.54856 au 
 Jupiter MOID = 2.02658 au 
 T_jup = 3.265 
[ 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 15.6   n/a MPO453775  

129709 (1998 SW157)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

Alternate Designations
 1998 SW157 = 2000 CJ18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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