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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2222397406044321 4.5457e-08  
a 2.387910333638356 1.1769e-08 au
q 1.857221760503925 1.0455e-07 au
i 22.67898740102966 7.0186e-06 deg
node 324.8139377958982 9.5686e-06 deg
peri 298.7904516323507 1.9633e-05 deg
M 80.81139358867456 1.8303e-05 deg
tp 2458897.951123361325
(2020-Feb-18.45112336)
6.81e-05 TDB
period 1347.799991475303
3.69
9.9639e-06
2.728e-08
d
yr
n .2671019455979842 1.9746e-09 deg/d
Q 2.918598906772787 1.4384e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1010  
   data-arc span      8740 days (23.93 yr)  
   first obs. used      1997-02-03  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50173  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:11:28  

Additional Information
 Earth MOID = .927413 au 
 Jupiter MOID = 2.53435 au 
 T_jup = 3.398 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457771.5 (2017-Jan-18.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2216880847666633 4.547e-08  
q 1.859223853671129 1.0459e-07 au
tp 2457549.507221155403
(2016-Jun-10.00722116)
6.7265e-05 TDB
node 324.8445020545386 9.5715e-06 deg
peri 298.8040699321968 1.965e-05 deg
i 22.67062466142981 7.0165e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1010  
   data-arc span      8740 days (23.93 yr)  
   first obs. used      1997-02-03  
   last obs. used      2021-01-08  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50173  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:11:28  

Additional Information
 Jupiter MOID = 2.53435 au 
 T_jup = 3.398 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.067526911223561E-15 -4.741248214091443E-15 1.590072845573524E-12 1.308233061918585E-14 3.620921059401773E-13 -3.342508233007604E-15
q -4.741248214091443E-15 1.093814638601048E-14 -3.783133145363591E-12 -3.11439168071261E-14 -8.601735792558146E-13 8.348908120427597E-15
tp 1.590072845573524E-12 -3.783133145363591E-12 4.524532786230574E-9 2.933036873889619E-11 1.159260386693842E-9 -1.416449175281929E-11
node 1.308233061918585E-14 -3.11439168071261E-14 2.933036873889619E-11 9.161350797963328E-11 -7.638151023224994E-11 1.740982921941068E-11
peri 3.620921059401773E-13 -8.601735792558146E-13 1.159260386693842E-9 -7.638151023224994E-11 3.861283228993279E-10 -2.004128195363961E-11
i -3.342508233007604E-15 8.348908120427597E-15 -1.416449175281929E-11 1.740982921941068E-11 -2.004128195363961E-11 4.923058010328401E-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 15.04   n/a E2021B10  

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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