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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 50 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07412160166814985 7.586e-08  
a 5.129152969590669 1.1527e-07 AU
q 4.748971936283661 3.9611e-07 AU
i 13.90843695520204 9.5781e-06 deg
node 327.4010921883959 2.7328e-05 deg
peri 95.61946525899724 7.5643e-05 deg
M 123.5060082441525 6.6888e-05 deg
tp 2455544.865002439956
(2010-Dec-14.36500244)
0.0008005 JED
period 4242.94013361432
11.62
0.00014302
3.916e-07
d
yr
n .08484682523515513 2.8601e-09 deg/d
Q 5.509334002897676 1.2381e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      869  
   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      .58783  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 13:42:19  

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
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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