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74225 (1998 SR9)
Classification: Main-belt Asteroid          SPK-ID: 2074225
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075639650949239 4.8272e-08  
a 2.752752241895139 1.6834e-08 au
q 2.456655295832957 1.3751e-07 au
i 4.304650400804108 4.2258e-06 deg
node 93.54545741283955 8.2171e-05 deg
peri 239.6271590074851 8.5651e-05 deg
M 300.1859818312955 2.519e-05 deg
tp 2459277.672150822259
(2021-Mar-04.17215082)
0.0001172 TDB
period 1668.203831659995
4.57
1.5302e-05
4.189e-08
d
yr
n .2158009669848147 1.9795e-09 deg/d
Q 3.048849187957321 1.8645e-08 au
  Orbit Determination Parameters
   # obs. used (total)      467  
   data-arc span      9857 days (26.99 yr)  
   first obs. used      1992-04-28  
   last obs. used      2019-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66107  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:36:52  

Additional Information
 Earth MOID = 1.44961 au 
 Jupiter MOID = 2.27072 au 
 T_jup = 3.332 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO432295  

74225 (1998 SR9)          Discovered 1998-Sep-17 by BAO Schmidt CCD Asteroid Program at Xinglong
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 SR9 = 2000 AG213 = 2000 AP255 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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