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4761 Urrutia (1981 QC)
Classification: Main-belt Asteroid          SPK-ID: 2004761
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 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .215698674250633 6.5071e-08  
a 2.340447463051615 8.9564e-09 au
q 1.835616048118125 1.5146e-07 au
i 25.57406979957272 6.4289e-06 deg
node 66.00255578738401 9.5413e-06 deg
peri 332.5457987544252 1.2615e-05 deg
M 266.6599609062347 8.4009e-06 deg
tp 2459339.587866450987
3.1057e-05 TDB
period 1307.816378775324
n .2752680008007807 1.5801e-09 deg/d
Q 2.845278877985106 1.0888e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1432  
   data-arc span      14217 days (38.92 yr)  
   first obs. used      1981-08-31  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46798  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-24 23:19:48  

Additional Information
 Earth MOID = .867597 au 
 Jupiter MOID = 2.57976 au 
 T_jup = 3.405 
[ 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 14.1   n/a MPO435744  
diameter diameter 3.732 km 0.859 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.383   0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

4761 Urrutia           Discovered 1981 Aug. 27 by H.-E. Schuster at the European Southern Observatory..
Named in honor of Antonio Urrutia A., Chilean lawyer in Santiago and for three decades legal advisor to the European Southern Observatory. The discoverer appreciates Urrutia's friendship and recalls his fruitful work.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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