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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2289944053860387 3.7257e-08  
a 2.340665320369505 7.8956e-09 au
q 1.804666057123768 8.8375e-08 au
i 8.721676105283246 5.101e-06 deg
node 21.17138089230284 2.7671e-05 deg
peri 260.51059628001 3.0005e-05 deg
M 337.5354503491292 1.0594e-05 deg
tp 2459082.121133879865
(2020-Aug-20.62113388)
3.8521e-05 TDB
period 1307.998987445195
3.58
6.6183e-06
1.812e-08
d
yr
n .2752295708601104 1.3926e-09 deg/d
Q 2.876664583615242 9.7037e-09 au
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      10126 days (27.72 yr)  
   first obs. used      1992-10-26  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55155  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:42:03  

Additional Information
 Earth MOID = .813841 au 
 Jupiter MOID = 2.33705 au 
 T_jup = 3.514 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457175.5 (2015-Jun-02.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2292999096918802 3.7303e-08  
q 1.803955657100302 8.8512e-08 au
tp 2457773.066446586237
(2017-Jan-19.56644659)
3.8425e-05 TDB
node 21.22805136551075 2.7698e-05 deg
peri 260.3230776117719 3.0008e-05 deg
i 8.718466647534543 5.0983e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      581  
   data-arc span      10126 days (27.72 yr)  
   first obs. used      1992-10-26  
   last obs. used      2020-07-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55155  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:42:03  

Additional Information
 Jupiter MOID = 2.33705 au 
 T_jup = 3.514 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.391516106984583E-15 -3.29412249701107E-15 -2.312474685888677E-13 2.282996281418147E-14 -5.558610169522379E-14 -3.396797012807217E-15
q -3.29412249701107E-15 7.834312534339665E-15 5.249508178491858E-13 -5.391920570151714E-14 1.20894204171741E-13 8.260763697712337E-15
tp -2.312474685888677E-13 5.249508178491858E-13 1.476447702204919E-9 -1.798699815390307E-11 4.566178441112481E-10 5.175028188982187E-12
node 2.282996281418147E-14 -5.391920570151714E-14 -1.798699815390307E-11 7.67161806518912E-10 -7.624396090888026E-10 4.379104154457356E-12
peri -5.558610169522379E-14 1.20894204171741E-13 4.566178441112481E-10 -7.624396090888026E-10 9.00493276846772E-10 -2.98570244122223E-12
i -3.396797012807217E-15 8.260763697712337E-15 5.175028188982187E-12 4.379104154457356E-12 -2.98570244122223E-12 2.599231528598516E-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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