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46978 (1998 SD145)
Classification: Main-belt Asteroid          SPK-ID: 2046978
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 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1280161276083259 3.7052e-08  
a 2.660823517603988 1.2169e-08 au
q 2.320195194631161 9.5386e-08 au
i 4.237647268157544 4.7009e-06 deg
node 50.43362042574829 4.8284e-05 deg
peri 289.6275361613622 5.1406e-05 deg
M 75.45585625699358 1.8574e-05 deg
tp 2458868.213281068562
(2020-Jan-19.71328107)
8.0962e-05 TDB
period 1585.340419541398
4.34
1.0875e-05
2.977e-08
d
yr
n .2270805661437305 1.5578e-09 deg/d
Q 3.001451840576814 1.3727e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1015  
   data-arc span      8181 days (22.40 yr)  
   first obs. used      1998-09-18  
   last obs. used      2021-02-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49321  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 09:54:26  

Additional Information
 Earth MOID = 1.31411 au 
 Jupiter MOID = 2.37826 au 
 T_jup = 3.370 
[ 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 14.84   n/a MPCxxxxx  

46978 (1998 SD145)          Discovered 1998-Sep-20 by Elst, E. W. at La Silla
Reference: 20020921/Numbers.arcLast Updated: 2004-04-19
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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