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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2614992443765304 8.424e-08  
a 2.647966011978383 2.6714e-08 AU
q 1.955524900711302 2.19e-07 AU
i 14.62781626213969 9.8661e-06 deg
node 173.3196031979721 3.9371e-05 deg
peri 199.5308230236494 4.4464e-05 deg
M 136.4029271466249 2.2462e-05 deg
tp 2456404.167847463107
(2013-Apr-21.66784746)
9.3513e-05 JED
period 1573.863401644701
4.31
2.3817e-05
6.521e-08
d
yr
n .2287364962065939 3.4614e-09 deg/d
Q 3.340407123245465 3.37e-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 = .960279 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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