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
JPL Small-Body Database Browser
Search: [ help ]  
26057 Ankaios (4742 T-2)
Classification: Jupiter Trojan          SPK-ID: 2026057
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1100088738659167 5.2117e-08  
a 5.196825179514295 1.2344e-07 au
q 4.625128293837887 3.3245e-07 au
i 7.29148496369595 6.1961e-06 deg
node 164.2607103484703 4.1354e-05 deg
peri 269.1403188678387 5.2112e-05 deg
M 272.2604971865696 3.6223e-05 deg
tp 2460055.125471766749
(2023-Apr-20.62547177)
0.00046014 TDB
period 4327.186246351898
11.85
0.00015418
4.221e-07
d
yr
n .08319493996901649 2.9643e-09 deg/d
Q 5.768522065190703 1.3702e-07 au
  Orbit Determination Parameters
   # obs. used (total)      626  
   data-arc span      17106 days (46.83 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5947  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 02:21:00  

Additional Information
 Earth MOID = 3.65012 au 
 Jupiter MOID = .0502997 au 
 T_jup = 2.972 
[ 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 12.2   n/a MPO412370  

26057 Ankaios           Discovered 1973 Sept. 30 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Ankaios was the father of hero Agapenor from Arkadie.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 4742 T-2 = 1998 UQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-30 23:52 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin