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42491 (1991 TF)
Classification: Main-belt Asteroid          SPK-ID: 2042491
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .262430243029871 7.5223e-08  
a 2.646188909806497 2.4959e-08 au
q 1.951748911103028 1.973e-07 au
i 14.63414526894392 8.8907e-06 deg
node 173.3223997771136 2.9692e-05 deg
peri 199.47484890706 3.3938e-05 deg
M 273.8331046298555 2.1958e-05 deg
tp 2457976.828958870714
(2017-Aug-11.32895887)
9.9864e-05 JED
period 1572.279291385473
4.30
2.2245e-05
6.09e-08
d
yr
n .2289669538818211 3.2395e-09 deg/d
Q 3.340628908509965 3.1509e-08 au
  Orbit Determination Parameters
   # obs. used (total)      398  
   data-arc span      23245 days (63.64 yr)  
   first obs. used      1952-08-24  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58089  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 14:20:18  

Additional Information
 Earth MOID = .955276 au 
 Jupiter MOID = 2.12528 au 
 T_jup = 3.298 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8 mag n/a MPO337599  

42491 (1991 TF)          Discovered 1991-Oct-01 by McNaught, R. H. at Siding Spring
Reference: 20020624/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1991 TF = 2002 EM147 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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