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2456 Palamedes (1966 BA1)
Classification: Jupiter Trojan          SPK-ID: 2002456
[ 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.
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 2456400.5 (2013-Apr-18.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07494359153223694 8.277e-08  
a 5.129268041489959 1.4452e-07 AU
q 4.744862272529178 4.6445e-07 AU
i 13.90917792681088 1.0452e-05 deg
node 327.4027565972591 3.2746e-05 deg
peri 95.7185799396605 8.4662e-05 deg
M 72.39856744974814 7.336e-05 deg
tp 2455547.185764118670
(2010-Dec-16.68576412)		 0.00087547 JED
period 4243.082919154464
11.62		 0.00017932
4.91e-07		 d
yr
n .08484397002350796 3.5857e-09 deg/d
Q 5.513673810450739 1.5535e-07 AU
   Orbit Determination Parameters
   # obs. used (total)      771  
   data-arc span      21957 days (60.11 yr)  
   first obs. used      1953-02-15  
   last obs. used      2013-03-29  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      0  
   fit RMS      .64532  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Apr-29 12:51:57  

Additional Information
 Earth MOID = 3.7935 AU 
 T_jup = 2.937 
[ 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 9.60 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
diameter diameter 91.66 km 3.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12
rotation period rot_per 7.24 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List:
[Stephens, R.D. (2010) Minor Planet Bul. 37, 47-48.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
geometric albedo albedo 0.0304   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 12

2456 Palamedes (1966 BA1)          Discovered 1966-Jan-30 by Purple Mountain Observatory at Nanking (330)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1966 BA1 = 1973 TJ = 1977 AK1 = 1979 EF 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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