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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 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2223615227056209 4.5631e-08  
a 2.388759527197967 1.1789e-08 au
q 1.857591321352668 1.0504e-07 au
i 22.67635311945383 7.0536e-06 deg
node 324.8130740791824 9.5897e-06 deg
peri 298.8689958627767 1.964e-05 deg
M 27.32723560501715 1.8206e-05 deg
tp 2458898.135286441285
(2020-Feb-18.63528644)		 6.8066e-05 TDB
period 1348.519016477899
3.69		 9.9829e-06
2.733e-08		 d
yr
n .2669595278976922 1.9763e-09 deg/d
Q 2.919927733043266 1.4411e-08 au
   Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      8687 days (23.78 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:00:15  

Additional Information
 Earth MOID = .929328 au 
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457754.5 (2017-Jan-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2216825053558537 4.5613e-08  
q 1.859231028829157 1.0492e-07 au
tp 2457549.506173540978
(2016-Jun-10.00617354)		 6.7306e-05 TDB
node 324.8445816858741 9.5919e-06 deg
peri 298.8040243001353 1.968e-05 deg
i 22.67070800828732 7.0524e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      981  
   data-arc span      8687 days (23.78 yr)  
   first obs. used      1997-02-03  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4998  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:00:15  

Additional Information
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.080505928177227E-15 -4.771359153174306E-15 1.593838919305345E-12 1.295372725515441E-14 3.629637496246041E-13 -3.133772053844173E-15
q -4.771359153174306E-15 1.10081598078779E-14 -3.792567556306757E-12 -3.084989449348571E-14 -8.624690475610051E-13 7.863997949142761E-15
tp 1.593838919305345E-12 -3.792567556306757E-12 4.530130759853138E-9 2.89776949527014E-11 1.161460188949121E-9 -1.372025594603678E-11
node 1.295372725515441E-14 -3.084989449348571E-14 2.89776949527014E-11 9.200399548166203E-11 -7.682979984647977E-11 1.726977010128648E-11
peri 3.629637496246041E-13 -8.624690475610051E-13 1.161460188949121E-9 -7.682979984647977E-11 3.872921871000632E-10 -1.979512811305889E-11
i -3.133772053844173E-15 7.863997949142761E-15 -1.372025594603678E-11 1.726977010128648E-11 -1.979512811305889E-11 4.973625958623478E-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 20 CATAB v2.0f-lin.ifort 2020-Dec-17 22:00:17 2020-Dec-17 22:00

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