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2456 Palamedes (1966 BA1)
Classification: Jupiter Trojan          SPK-ID: 2002456
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 49 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0741216002036232 7.5895e-08  
a 5.129152983947795 1.1583e-07 AU
q 4.748971957088395 3.9668e-07 AU
i 13.90843624856884 9.5844e-06 deg
node 327.4010945516843 2.7423e-05 deg
peri 95.61945576715124 7.5852e-05 deg
M 123.5060141008403 6.7e-05 deg
tp 2455544.864927301606
(2010-Dec-14.36492730)
0.00080208 JED
period 4242.940151429082
11.62
0.00014373
3.935e-07
d
yr
n .08484682487891018 2.8741e-09 deg/d
Q 5.509334010807194 1.2442e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      849  
   data-arc span      22616 days (61.92 yr)  
   first obs. used      1953-02-15  
   last obs. used      2015-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5899  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Feb-04 13:02:32  

Additional Information
 Earth MOID = 3.79793 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 9.3 mag n/a MPO263367  
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 LCDB (Rev. 2015-Feb); Warner et al., 2009 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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