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JPL Small-Body Database Browser
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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 ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2223615210798096 6.4594e-08  
a 2.38875953808336 1.8006e-08 au
q 1.857591333701241 1.5909e-07 au
i 22.676346572015 8.0692e-06 deg
node 324.8130636756335 1.4646e-05 deg
peri 298.868996421986 2.4878e-05 deg
M 27.32723288397233 2.7825e-05 deg
tp 2458898.135295934307
(2020-Feb-18.63529593)
0.00010349 TDB
period 1348.519025695544
3.69
1.5247e-05
4.174e-08
d
yr
n .2669595260729213 3.0184e-09 deg/d
Q 2.919927742465479 2.201e-08 au
  Orbit Determination Parameters
   # obs. used (total)      569  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1997-02-03  
   last obs. used      2019-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59142  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:39:29  

Additional Information
 Earth MOID = .929328 au 
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456660.5 (2014-Jan-03.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2231507148768338 6.4808e-08  
q 1.854801865927383 1.5941e-07 au
tp 2456200.865069904676
(2012-Sep-30.36506990)
8.7007e-05 TDB
node 324.8638855451201 1.4661e-05 deg
peri 298.7031038700553 2.476e-05 deg
i 22.67084830627103 8.068e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      569  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1997-02-03  
   last obs. used      2019-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59142  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:39:29  

Additional Information
 Jupiter MOID = 2.5333 au 
 T_jup = 3.397 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.200061872683623E-15 -1.029547762870701E-14 -9.298040547176086E-13 8.973597569885832E-15 -4.876490332116065E-14 5.720821582406913E-15
q -1.029547762870701E-14 2.541001288076495E-14 2.697339645008782E-12 -2.253574772928929E-14 2.238609389894301E-13 -1.051619936978854E-14
tp -9.298040547176086E-13 2.697339645008782E-12 7.570220773987441E-9 -6.070531836812541E-12 1.746880492876629E-9 2.684540074372816E-11
node 8.973597569885832E-15 -2.253574772928929E-14 -6.070531836812541E-12 2.149304067751784E-10 -1.98358010483283E-10 -1.460315142504704E-11
peri -4.876490332116065E-14 2.238609389894301E-13 1.746880492876629E-9 -1.98358010483283E-10 6.130692139820177E-10 1.990700760404848E-11
i 5.720821582406913E-15 -1.051619936978854E-14 2.684540074372816E-11 -1.460315142504704E-11 1.990700760404848E-11 6.50919952145409E-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

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