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146440 (2001 QH284)
Classification: Main-belt Asteroid          SPK-ID: 2146440
[ 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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08633614684509712 4.8614e-08  
a 2.655999142582553 1.6658e-08 au
q 2.426690410588094 1.3011e-07 au
i 1.842431173971972 5.4496e-06 deg
node 182.8167197671335 0.00012435 deg
peri 145.6467234174222 0.00012723 deg
M 135.1494560995126 2.6695e-05 deg
tp 2458406.957086605589
(2018-Oct-15.45708661)		 0.00011585 TDB
period 1581.030771331077
4.33		 1.4874e-05
4.072e-08		 d
yr
n .2276995530560827 2.1421e-09 deg/d
Q 2.885307874577012 1.8096e-08 au
   Orbit Determination Parameters
   # obs. used (total)      371  
   data-arc span      6737 days (18.44 yr)  
   first obs. used      2001-08-18  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55884  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 08:37:26  

Additional Information
 Earth MOID = 1.41559 au 
 Jupiter MOID = 2.37475 au 
 T_jup = 3.382 
[ 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 16.3   n/a MPO453929  

146440 (2001 QH284)          Discovered 2001-Aug-18 by NEAT at Palomar
Reference: 20070106/Numbers.arcLast Updated: 2007-01-09
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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