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74243 (1998 SR55)
Classification: Main-belt Asteroid          SPK-ID: 2074243
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09421373033650025 4.0224e-08  
a 2.70834047950321 1.5067e-08 au
q 2.453177619907867 1.1183e-07 au
i 2.532817915523727 4.8039e-06 deg
node 29.74450108080688 9.1278e-05 deg
peri 296.9609968268333 9.4515e-05 deg
M 340.2070367547308 2.6492e-05 deg
tp 2459090.007955148027
(2020-Aug-28.50795515)
0.0001201 TDB
period 1627.995942496957
4.46
1.3585e-05
3.719e-08
d
yr
n .2211307722596937 1.8452e-09 deg/d
Q 2.963503339098553 1.6486e-08 au
  Orbit Determination Parameters
   # obs. used (total)      875  
   data-arc span      7598 days (20.80 yr)  
   first obs. used      1998-09-14  
   last obs. used      2019-07-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58807  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 17:13:04  

Additional Information
 Earth MOID = 1.44283 au 
 Jupiter MOID = 2.31135 au 
 T_jup = 3.356 
[ 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 15.1   n/a MPO436302  

74243 (1998 SR55)          Discovered 1998-Sep-16 by LONEOS at Anderson Mesa
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 SR55 = 2000 AE27 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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