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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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2223615140495708 4.758e-08  
a 2.388759528888383 1.2129e-08 au
q 1.857591343344423 1.1046e-07 au
i 22.67635396053295 7.8495e-06 deg
node 324.8130730717344 1.1036e-05 deg
peri 298.8689965763303 2.1012e-05 deg
M 27.3272343969452 1.8632e-05 deg
tp 2458898.135290857926
(2020-Feb-18.63529086)
6.9635e-05 TDB
period 1348.519017909326
3.69
1.0271e-05
2.812e-08
d
yr
n .2669595276143197 2.0333e-09 deg/d
Q 2.919927714432343 1.4827e-08 au
  Orbit Determination Parameters
   # obs. used (total)      812  
   data-arc span      8631 days (23.63 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5302  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 18:49:09  

Additional Information
 Earth MOID = .929328 au 
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457241.5 (2015-Aug-07.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2218356511073986 4.7587e-08  
q 1.859361489569108 1.1031e-07 au
tp 2457549.238804757328
(2016-Jun-09.73880476)
6.8512e-05 TDB
node 324.8488436483682 1.1036e-05 deg
peri 298.7012692748158 2.1034e-05 deg
i 22.67357440995366 7.8485e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      812  
   data-arc span      8631 days (23.63 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-09-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5302  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-22 18:49:09  

Additional Information
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.264556123111096E-15 -5.232947728334487E-15 1.545720633897035E-12 -7.876806272902152E-15 3.896752898666508E-13 1.147495681684801E-14
q -5.232947728334487E-15 1.216809119563712E-14 -3.647122017565411E-12 1.771064489998481E-14 -9.206979563260733E-13 -2.65575574737708E-14
tp 1.545720633897035E-12 -3.647122017565411E-12 4.693945633113917E-9 -1.909896634902733E-11 1.235793722749799E-9 1.678573687396441E-11
node -7.876806272902152E-15 1.771064489998481E-14 -1.909896634902733E-11 1.217882524349998E-10 -1.166630725475927E-10 -2.22538307169336E-13
peri 3.896752898666508E-13 -9.206979563260733E-13 1.235793722749799E-9 -1.166630725475927E-10 4.42442389209229E-10 4.3766825185625E-12
i 1.147495681684801E-14 -2.65575574737708E-14 1.678573687396441E-11 -2.22538307169336E-13 4.3766825185625E-12 6.159963212739483E-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

[ 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
2166-Oct-14 03:22 00:02 Hebe 0.0330499511921229 0.0330200436102475 0.0330798628655416 13.2988450396209 13.2988450254769 2512461.640213166 2.43845275954837 1600.31097861728 59.2771521282846 -21.2764556720644 30399.5401828971 T 18 CATAB v2.0f-lin.ifort 2020-Oct-22 18:49:24 2020-Oct-22 18:49

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