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JPL Small-Body Database Browser
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74864 (1999 TF91)
Classification: Main-belt Asteroid          SPK-ID: 2074864
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2287576746237024 4.2058e-08  
a 2.340642920049602 1.3264e-08 au
q 1.805202888534623 9.6216e-08 au
i 8.721433068192701 6.3463e-06 deg
node 21.17726480268612 3.3155e-05 deg
peri 260.483065953793 3.8788e-05 deg
M 227.4387323398701 2.5241e-05 deg
tp 2459082.131985692705
(2020-Aug-20.63198569)		 9.4734e-05 TDB
period 1307.980211036584
3.58		 1.1119e-05
3.044e-08		 d
yr
n .2752335218548125 2.3396e-09 deg/d
Q 2.876082951564582 1.6299e-08 au
   Orbit Determination Parameters
   # obs. used (total)      468  
   data-arc span      9592 days (26.26 yr)  
   first obs. used      1992-10-26  
   last obs. used      2019-01-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58165  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 11:07:29  

Additional Information
 Earth MOID = .813844 au 
 Jupiter MOID = 2.33634 au 
 T_jup = 3.514 
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[ 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 16.1   n/a MPO366107  

74864 (1999 TF91)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1999 TF91 = 2002 HW4 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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