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101172 (1998 SF4)
Classification: Main-belt Asteroid          SPK-ID: 2101172
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1509926570168971 4.656e-08  
a 2.625077514669113 1.3085e-08 au
q 2.228710085853911 1.2488e-07 au
i 4.221753143267875 5.7133e-06 deg
node 2.98355141115692 4.5781e-05 deg
peri 329.6933032584453 4.9839e-05 deg
M 63.31901623132219 1.5923e-05 deg
tp 2458727.260625263530
(2019-Aug-31.76062526)
6.9244e-05 TDB
period 1553.501313819686
4.25
1.1615e-05
3.18e-08
d
yr
n .2317345964226104 1.7326e-09 deg/d
Q 3.021444943484315 1.5061e-08 au
  Orbit Determination Parameters
   # obs. used (total)      521  
   data-arc span      8082 days (22.13 yr)  
   first obs. used      1998-08-27  
   last obs. used      2020-10-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5824  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:02:01  

Additional Information
 Earth MOID = 1.21976 au 
 Jupiter MOID = 2.33819 au 
 T_jup = 3.383 
[ 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 16.0   n/a MPO493568  

101172 (1998 SF4)          Discovered 1998-Sep-19 by Comba, P. G. at Prescott
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

Alternate Designations
 1998 SF4 = 2002 PB99 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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