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18263 Anchialos (5167 T-2)
Classification: Jupiter Trojan          SPK-ID: 2018263
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03918594995353096 4.3446e-08  
a 5.193093774666545 8.9972e-08 au
q 4.989597461908469 2.8067e-07 au
i 10.60856330192217 5.0164e-06 deg
node 311.3951915741446 3.3717e-05 deg
peri 144.4918660548078 9.4614e-05 deg
M 305.5077903554098 8.9303e-05 deg
tp 2459854.788959933524
(2022-Oct-02.28895993)
0.0010756 TDB
period 4322.526598064877
11.83
0.00011233
3.075e-07
d
yr
n .08328462343324063 2.1644e-09 deg/d
Q 5.396590087424622 9.3497e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1365  
   data-arc span      17335 days (47.46 yr)  
   first obs. used      1973-09-20  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48176  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 02:25:51  

Additional Information
 Earth MOID = 4.01238 au 
 Jupiter MOID = .271534 au 
 T_jup = 2.964 
[ 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 11.45   n/a E2021B10  
diameter diameter 21.331 km 0.648 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 10.39 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[French, L.M.; Stephens, R.D.; Coley, D.; Wasserman, L.; Sieben, J. (2015) Icarus 254, 1-17.]
geometric albedo albedo 0.129   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

18263 Anchialos           Discovered 1973 Sept. 25 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
The Greek heroes Anchialos and Menestheus were together on their chariot when they were killed by Hector.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 5167 T-2 = 1998 XP38 = 2000 AG5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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