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JPL Small-Body Database Browser
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34746 (2001 QE91)
Classification: Jupiter Trojan          SPK-ID: 2034746
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03830187205022276 4.7015e-08  
a 5.162119269214246 9.9529e-08 au
q 4.964400437456812 2.9035e-07 au
i 27.42414642970271 5.2214e-06 deg
node 93.25376659836253 1.1209e-05 deg
peri 195.7013194084579 0.0001077 deg
M 256.066791617947 0.00011221 deg
tp 2459837.279596531604
0.0013452 TDB
period 4283.911385807474
n .08403535170981218 2.4304e-09 deg/d
Q 5.35983810097168 1.0334e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1670  
   data-arc span      25550 days (69.95 yr)  
   first obs. used      1949-05-29  
   last obs. used      2019-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41687  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 03:52:34  

Additional Information
 Earth MOID = 3.95149 au 
 Jupiter MOID = .19915 au 
 T_jup = 2.775 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.9   n/a MPO474201  
diameter diameter 61.684 km 0.917 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
rotation period rot_per 19.633 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Molnar, L.A.; Haegert, M.J.; Hoogenboom, K.M. (2008) Minor Planet Bull. 35, 82-84.]
geometric albedo albedo 0.061   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  

34746 (2001 QE91)          Discovered 2001-Aug-22 by LINEAR at Socorro
Reference: 20020128/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 2001 QE91 = 1949 KS = 1990 VD1 = 1991 XC5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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