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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2608964133585348 8.4253e-08  
a 2.649382441857954 2.6658e-08 AU
q 1.958168065162137 2.1909e-07 AU
i 14.61626762934244 9.8598e-06 deg
node 173.3413368184706 3.9408e-05 deg
peri 199.5975496767352 4.4531e-05 deg
M 90.61625596646866 2.2135e-05 deg
tp 2456404.022066515934
(2013-Apr-21.52206652)
9.3837e-05 JED
period 1575.126389100427
4.31
2.3773e-05
6.509e-08
d
yr
n .2285530878608415 3.4495e-09 deg/d
Q 3.340596818553772 3.3613e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      313  
   data-arc span      22413 days (61.36 yr)  
   first obs. used      1952-08-24  
   last obs. used      2014-01-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56545  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:49:08  

Additional Information
 Earth MOID = .961572 AU 
 T_jup = 3.297 
[ 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 14.6 mag n/a MPO235017  

42491 (1991 TF)          Discovered 1991-Oct-01 by McNaught, R. H. at Siding Spring (413)
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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