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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456811.5 (2014-Jun-03.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2297803054987175 4.2209e-08  
q 1.802214273779365 9.6641e-08 au
tp 2456465.433849259422
(2013-Jun-21.93384926)
7.8863e-05 TDB
node 21.24562921274449 3.3188e-05 deg
peri 260.3059946179808 3.8749e-05 deg
i 8.719454988490067 6.3436e-06 deg
  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
 Jupiter MOID = 2.33634 au 
 T_jup = 3.514 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.781613497622733E-15 -4.058148851693533E-15 1.093685721710819E-12 -6.402122390269262E-16 2.864948083782196E-13 3.000463051599734E-15
q -4.058148851693533E-15 9.33939311478837E-15 -2.069967975956585E-12 1.19818583495826E-15 -5.461649025935946E-13 -6.236138972761818E-15
tp 1.093685721710819E-12 -2.069967975956585E-12 6.219297425243858E-9 -3.369247990111667E-12 1.601338967829485E-9 4.736775518250437E-12
node -6.402122390269262E-16 1.19818583495826E-15 -3.369247990111667E-12 1.101447598993902E-9 -1.08851456909762E-9 -6.169742418926728E-11
peri 2.864948083782196E-13 -5.461649025935946E-13 1.601338967829485E-9 -1.08851456909762E-9 1.501450620092996E-9 6.214449552980189E-11
i 3.000463051599734E-15 -6.236138972761818E-15 4.736775518250437E-12 -6.169742418926728E-11 6.214449552980189E-11 4.024132443149663E-11

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

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