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120891 (1998 SD1)
Classification: Main-belt Asteroid          SPK-ID: 2120891
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 .1485977482122326 4.2052e-08  
a 2.285628358357412 1.0248e-08 au
q 1.945989131055479 9.6624e-08 au
i 5.808833092333445 5.4974e-06 deg
node 188.2188898618089 4.5459e-05 deg
peri 216.7462767786095 4.9049e-05 deg
M 78.98509602385668 1.9109e-05 deg
tp 2458723.583075065311
(2019-Aug-28.08307507)
6.6301e-05 TDB
period 1262.138023436441
3.46
8.4881e-06
2.324e-08
d
yr
n .2852302944014182 1.9182e-09 deg/d
Q 2.625267585659345 1.177e-08 au
  Orbit Determination Parameters
   # obs. used (total)      458  
   data-arc span      10343 days (28.32 yr)  
   first obs. used      1991-10-06  
   last obs. used      2020-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54115  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 06:24:16  

Additional Information
 Earth MOID = .958102 au 
 Jupiter MOID = 2.76464 au 
 T_jup = 3.581 
[ 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 16.9   n/a MPO493690  

120891 (1998 SD1)          Discovered 1998-Sep-16 by ODAS at Caussols
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23

Alternate Designations
 1998 SD1 = 2000 FT8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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