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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2623149788335804 8.4014e-08  
a 2.646222210956608 2.616e-08 au
q 1.952078487700576 2.1836e-07 au
i 14.63416851148045 9.757e-06 deg
node 173.323074036943 3.0206e-05 deg
peri 199.4804573896179 3.4449e-05 deg
M 228.0193812472486 2.1686e-05 deg
tp 2457976.928641347759
(2017-Aug-11.42864135)
0.00010097 JED
period 1572.308971167536
4.30
2.3316e-05
6.384e-08
d
yr
n .2289626317737523 3.3953e-09 deg/d
Q 3.340365934212641 3.3023e-08 au
  Orbit Determination Parameters
   # obs. used (total)      383  
   data-arc span      22912 days (62.73 yr)  
   first obs. used      1952-08-24  
   last obs. used      2015-05-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5802  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 17:29:40  

Additional Information
 Earth MOID = .954989 au 
 Jupiter MOID = 2.12596 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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