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11311 Peleus (1993 XN2)
Classification: Apollo [NEO]          SPK-ID: 2011311
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 55 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5353955999590734 8.9864e-08  
a 2.118283944454823 3.105e-08 au
q .9841640411297605 1.9072e-07 au
i 25.4383393684801 1.287e-05 deg
node 59.45152967597419 1.9555e-05 deg
peri 313.2322145477572 2.6945e-05 deg
M 146.7852628907931 5.7788e-05 deg
tp 2457141.349942724831
0.00017078 JED
period 1126.09411438012
n .3196890876196158 7.029e-09 deg/d
Q 3.252403847779885 4.7674e-08 au
  Orbit Determination Parameters
   # obs. used (total)      256  
   data-arc span      8157 days (22.33 yr)  
   first obs. used      1993-12-10  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55236  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:11:27  

Additional Information
 Earth MOID = .0966966 au 
 Jupiter MOID = 2.46213 au 
 T_jup = 3.430 
[ 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 16.1 mag n/a MPO299044  
SMASSII spectral type spec_B Sq   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

11311 Peleus           Discovered 1993 Dec. 10 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Peleus, king of the Myrmidons in Thessaly, helped Heracles conquer Troy. He was married to the goddess Thetis---the only instance where a goddess married a mortal. He was also the father of Achilles. Too old to take part in the Trojan War, he gave his golden armor to his son.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000726/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-02 03:38 UT
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