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617 Patroclus (1906 VY)
Classification: Jupiter Trojan          SPK-ID: 2000617
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1392848765449093 6.3689e-08  
a 5.217589770774683 7.3021e-08 AU
q 4.49085842369035 3.4938e-07 AU
i 22.04924559547465 7.7673e-06 deg
node 44.36396025451213 1.5692e-05 deg
peri 308.4827748318972 2.8371e-05 deg
M 70.60867408343107 2.3049e-05 deg
tp 2456146.694639073518
(2012-Aug-07.19463907)
0.00027644 JED
period 4353.146889153389
11.92
9.1385e-05
2.502e-07
d
yr
n .08269879449668967 1.7361e-09 deg/d
Q 5.944321117859015 8.3192e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1075  
   data-arc span      39421 days (107.93 yr)  
   first obs. used      1906-10-21  
   last obs. used      2014-09-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .62314  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 13:47:10  

Additional Information
 Earth MOID = 3.53774 AU 
 T_jup = 2.835 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.19 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
diameter diameter 140.92 km 4.7 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
rotation period rot_per 102.8 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Behrend, R. (2005) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Marchis, F.; Hestroffer, D.; Descamps, P.; Berthier, J.; et al. (2006) Nature 439, 565-567.]
[Behrend, R. (2006) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Behrend, R. (2008) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]
[Mueller, M.; Marchis, F.; Emery, J.P.; Harris, A.W. (DLR); et al. (2010) Icarus 205, 505-515.]
[Oey, J. (2012) Minor Planet Bul. 39, 106-107.]
geometric albedo albedo 0.0471   0.003 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 8
B-V BV .677 mag .013 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=5; phase (min.=2.24, mean=6.14, max.=8.61) deg.
U-B UB .215 mag .045 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=7; phase (min.=2.24, mean=6.52, max.=8.61) deg.
Tholen spectral type spec_T P   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices; used ground-based radiometric albedo

617 Patroclus (1906 VY)          Discovered 1906-Oct-17 by Kopff, A. at Heidelberg (024)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1906 VY = 1941 XC = 1962 NB 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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