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11769 Alfredjoy (2199 T-2)
Classification: Main-belt Asteroid          SPK-ID: 2011769
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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03809525676588634 5.7781e-08  
a 2.598774505373964 2.474e-08 AU
q 2.499773523315103 1.6261e-07 AU
i 3.061726273713483 7.3821e-06 deg
node 181.8062625944083 0.00011067 deg
peri 57.25642868818429 0.00015636 deg
M 65.33701670121424 0.00011488 deg
tp 2456722.779381935433
0.00048696 JED
period 1530.211012854312
n .235261671087107 3.3594e-09 deg/d
Q 2.697775487432824 2.5682e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      701  
   data-arc span      15252 days (41.76 yr)  
   first obs. used      1973-09-19  
   last obs. used      2015-06-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56368  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:07:47  

Additional Information
 Earth MOID = 1.49065 AU 
 T_jup = 3.413 
[ 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 14.7 mag n/a PDS3 (MPC 35902)  

11769 Alfredjoy           Discovered 1973 Sept. 29 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Alfred H. Joy (1882-1973) was an astronomer at the Mount Wilson Observatory from 1915 to 1973 who measured spectroscopic parallaxes and radial velocities of stars and studied variable stars. He invented the T Tauri classification.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20071124/MPCPages.arcLast Updated: 2007-11-26

[ show close-approach data ]
Alternate Designations
 2199 T-2 = 1997 LC11 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2015-Sep-02 10:33 UT
(server date/time)  
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