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74158 (1998 QU97)
Classification: Main-belt Asteroid          SPK-ID: 2074158
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2223615158743289 5.0353e-08  
a 2.388759528423051 1.2971e-08 au
q 1.857591338623655 1.1851e-07 au
i 22.67635322841851 8.0223e-06 deg
node 324.8130770494092 1.2823e-05 deg
peri 298.8689928853807 2.2208e-05 deg
M 27.32723478555029 1.9732e-05 deg
tp 2458898.135289432167
(2020-Feb-18.63528943)
7.3669e-05 TDB
period 1348.519017515288
3.69
1.0984e-05
3.007e-08
d
yr
n .2669595276923254 2.1743e-09 deg/d
Q 2.919927718222448 1.5855e-08 au
  Orbit Determination Parameters
   # obs. used (total)      690  
   data-arc span      8580 days (23.49 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56486  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:10:59  

Additional Information
 Earth MOID = .929328 au 
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456974.5 (2014-Nov-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2225682113500952 5.0464e-08  
q 1.857041241272621 1.187e-07 au
tp 2457548.812402727217
(2016-Jun-09.31240273)
7.1087e-05 TDB
node 324.8515132587511 1.2829e-05 deg
peri 298.7076895707626 2.2171e-05 deg
i 22.67279518143679 8.0213e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      690  
   data-arc span      8580 days (23.49 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-08-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56486  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 07:10:59  

Additional Information
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.546643192352403E-15 -5.969588661476912E-15 1.226203775429864E-12 -8.410968141324758E-15 3.479054798250047E-13 1.258282035751922E-14
q -5.969588661476912E-15 1.408897469388327E-14 -2.81636432546811E-12 1.758677580557585E-14 -8.097335303800458E-13 -2.884372264696114E-14
tp 1.226203775429864E-12 -2.81636432546811E-12 5.053372188254971E-9 -3.722740357854066E-11 1.299308630637233E-9 2.181301733321964E-11
node -8.410968141324758E-15 1.758677580557585E-14 -3.722740357854066E-11 1.645744508378179E-10 -1.59866827452931E-10 -1.066883021675752E-11
peri 3.479054798250047E-13 -8.097335303800458E-13 1.299308630637233E-9 -1.59866827452931E-10 4.915563420559432E-10 1.51400155493247E-11
i 1.258282035751922E-14 -2.884372264696114E-14 2.181301733321964E-11 -1.066883021675752E-11 1.51400155493247E-11 6.434166587985959E-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 14.9   n/a MPO236708  

74158 (1998 QU97)          Discovered 1998-Aug-24 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1998 QU97 = 1997 EJ7 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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