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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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2223615209730819 4.5947e-08  
a 2.388759527455602 1.1809e-08 au
q 1.857591325691634 1.0588e-07 au
i 22.67635341054282 7.2403e-06 deg
node 324.8130738233992 9.6834e-06 deg
peri 298.8689958626531 1.9771e-05 deg
M 27.32723561435554 1.823e-05 deg
tp 2458898.135286389744
(2020-Feb-18.63528639)
6.8157e-05 TDB
period 1348.519016696061
3.69
1e-05
2.738e-08
d
yr
n .2669595278545036 1.9797e-09 deg/d
Q 2.91992772921957 1.4435e-08 au
  Orbit Determination Parameters
   # obs. used (total)      954  
   data-arc span      8671 days (23.74 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50118  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:44:48  

Additional Information
 Earth MOID = .929328 au 
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457652.5 (2016-Sep-21.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2216555005204124 4.5926e-08  
q 1.859206847266393 1.0575e-07 au
tp 2457549.485982341512
(2016-Jun-09.98598234)
6.7416e-05 TDB
node 324.8445478572942 9.6855e-06 deg
peri 298.7960186536475 1.9813e-05 deg
i 22.67117833850433 7.2391e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      954  
   data-arc span      8671 days (23.74 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50118  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:44:48  

Additional Information
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.109239521582025E-15 -4.842343136352294E-15 1.607225753371024E-12 1.121347735588679E-14 3.704723742631117E-13 -6.935171759940863E-16
q -4.842343136352294E-15 1.118363968983229E-14 -3.825131989269411E-12 -2.678857692579626E-14 -8.807042931417259E-13 2.127391186770493E-15
tp 1.607225753371024E-12 -3.825131989269411E-12 4.544888509374516E-9 2.471334103473462E-11 1.170113068805724E-9 -8.444966636458838E-12
node 1.121347735588679E-14 -2.678857692579626E-14 2.471334103473462E-11 9.380829304689019E-11 -7.961045339366583E-11 1.508260153818022E-11
peri 3.704723742631117E-13 -8.807042931417259E-13 1.170113068805724E-9 -7.961045339366583E-11 3.925558513449918E-10 -1.636389278977359E-11
i -6.935171759940863E-16 2.127391186770493E-15 -8.444966636458838E-12 1.508260153818022E-11 -1.636389278977359E-11 5.240457824112783E-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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