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74865 (1999 TG91)
Classification: Main-belt Asteroid          SPK-ID: 2074865
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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1359887070700684 3.2867e-08  
a 2.304528021062552 9.5612e-09 au
q 1.991138235071512 7.294e-08 au
i 3.80996361595857 4.4183e-06 deg
node 143.7679519808447 6.4625e-05 deg
peri 119.1402822018615 6.9199e-05 deg
M 111.7010449853813 2.6662e-05 deg
tp 2458804.015556606127
(2019-Nov-16.51555661)
9.4578e-05 TDB
period 1277.82510575863
3.50
7.9523e-06
2.177e-08
d
yr
n .2817286954041118 1.7533e-09 deg/d
Q 2.617917807053592 1.0861e-08 au
  Orbit Determination Parameters
   # obs. used (total)      946  
   data-arc span      8761 days (23.99 yr)  
   first obs. used      1997-01-10  
   last obs. used      2021-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55217  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:59:20  

Additional Information
 Earth MOID = .97713 au 
 Jupiter MOID = 2.4467 au 
 T_jup = 3.574 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457617.5 (2016-Aug-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1354592316137908 3.2864e-08  
q 1.992786097327297 7.2896e-08 au
tp 2457526.115309726712
(2016-May-17.61530973)
9.5308e-05 TDB
node 143.7958648883869 6.4661e-05 deg
peri 119.2757260809127 6.9271e-05 deg
i 3.80864161986377 4.417e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      946  
   data-arc span      8761 days (23.99 yr)  
   first obs. used      1997-01-10  
   last obs. used      2021-01-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55217  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 06:59:20  

Additional Information
 Jupiter MOID = 2.4467 au 
 T_jup = 3.574 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.080017924273716E-15 -2.382427583923161E-15 -7.012924296142128E-13 6.359249332565224E-15 -2.011232234284823E-13 1.320952574901078E-15
q -2.382427583923161E-15 5.313767850393565E-15 1.547887888643661E-12 -1.40563834882933E-14 4.445048545306743E-13 -2.858357217271327E-15
tp -7.012924296142128E-13 1.547887888643661E-12 9.083558642721498E-9 -1.775410214497374E-12 2.388421160362484E-9 -2.018754883231408E-12
node 6.359249332565224E-15 -1.40563834882933E-14 -1.775410214497374E-12 4.180997699614292E-9 -4.172034390396692E-9 1.210265054499475E-10
peri -2.011232234284823E-13 4.445048545306743E-13 2.388421160362484E-9 -4.172034390396692E-9 4.798430060285007E-9 -1.213085037066238E-10
i 1.320952574901078E-15 -2.858357217271327E-15 -2.018754883231408E-12 1.210265054499475E-10 -1.213085037066238E-10 1.95095655511527E-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 15.99   n/a E2021B10  

74865 (1999 TG91)          Discovered 1999-Oct-02 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1905-Oct-18 20:19 00:20 Psych 0.0340168321933781 0.0340153081579998 0.0340183562510153 2.1520143959999 2.15201423072224 2417137.346747785 20.0233957136097 135.270862526505 69.9301473739912 -75.4655676732527 70851.2190694899 T 20 CATAB v2.0f-lin.ifort 2021-Feb-24 06:59:22 2021-Feb-24 06:59
1997-May-05 08:19 < 00:01 David 0.0363862702906181 0.0363837269092293 0.0363888136725603 5.3363946361784 5.33639455837518 2450573.846440473 0.884996002381826 126.983143042483 35.2667344855885 -3.47321067498905 43774.5520010233 T 20 CATAB v2.0f-lin.ifort 2021-Feb-24 06:59:22 2021-Feb-24 06:59
2097-Apr-22 22:09 < 00:01 Hebe 0.0281726435830779 0.0281659217470965 0.0281793763402709 7.0239294081691 7.02392937675318 2487086.422820714 0.981026191453132 945.382483947821 48.7051989476187 -69.4215065248903 81007.4666039326 T 20 CATAB v2.0f-lin.ifort 2021-Feb-24 06:59:22 2021-Feb-24 06:59

Alternate Designations
 1999 TG91 = 1998 FY120 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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