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144769 Zachariassen (2004 HO20)
Classification: Main-belt Asteroid          SPK-ID: 2144769
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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 2-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 has stopped working because of a recent Java upgrade, here is a possible workaround.
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04775988133518418 7.0596e-08  
a 3.122213489907335 4.6362e-08 au
q 2.973096944126249 2.3971e-07 au
i 1.076296608395916 7.9875e-06 deg
node 147.6620637441632 0.00046402 deg
peri 132.0258849371761 0.00047603 deg
M 11.79260053190495 0.00011135 deg
tp 2457534.491569411321
0.00062287 JED
period 2015.080129919892
n .1786529451879968 3.9793e-09 deg/d
Q 3.271330035688421 4.8577e-08 au
  Orbit Determination Parameters
   # obs. used (total)      230  
   data-arc span      7172 days (19.64 yr)  
   first obs. used      1995-09-17  
   last obs. used      2015-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .568  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 21:25:27  

Additional Information
 Earth MOID = 1.95656 au 
 Jupiter MOID = 1.78341 au 
 T_jup = 3.214 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.7 mag n/a MPO325479  

144769 Zachariassen           Discovered 2004 Apr. 19 by T. Glinos and D. H. Levy at the Jarnac Observatory, Vail.
Rayan Zachariassen (b. 1963) is a Canadian computer scientist who helped build and manage Canada's first national educational Internet backbone (CA*net)and commercial backbone (UUNET Canada). He has also helped found a number of startups in the networking and computing fields.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2013-07-22Last Updated: 2014-08-13

[ show close-approach data ]
Alternate Designations
 2004 HO20 = 2003 BV41 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-02 08:17 UT
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