Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
IMPORTANT: The SSD Announcement email list is now available. Major changes are coming in the near future, including possible hostname and/or URL changes. To be notified of such changes, subscribe to this email list.

Please visit this page for more details.


JPL Small-Body Database Browser
Search: [ help ]  
2456 Palamedes (1966 BA1)
Classification: Jupiter Trojan          SPK-ID: 2002456
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


[ revert to old Java-based viewer ]

Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 65 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07412184073628737 5.0614e-08  
a 5.13009647464965 8.4438e-08 au
q 4.749844280793879 3.0938e-07 au
i 13.91233290077081 6.7716e-06 deg
node 327.3566822420474 1.9663e-05 deg
peri 94.74433489500132 5.4057e-05 deg
M 260.3544537292872 5.3318e-05 deg
tp 2459775.240974450767
(2022-Jul-14.74097445)
0.00063626 TDB
period 4244.110917444728
11.62
0.00010478
2.869e-07
d
yr
n .08482341932211962 2.0942e-09 deg/d
Q 5.510348668505421 9.0697e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1399  
   data-arc span      24294 days (66.51 yr)  
   first obs. used      1953-02-15  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5566  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:24:52  

Additional Information
 Earth MOID = 3.79883 au 
 Jupiter MOID = .119666 au 
 T_jup = 2.937 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.3   n/a MPO263367  
diameter diameter 65.916 km 0.512 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 7.24 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Stephens, R.D. (2010) Minor Planet Bull. 37, 47-48.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
geometric albedo albedo 0.071   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2019-Oct-17 14:25 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin