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11428 Alcinoos (4139 P-L)
Classification: Jupiter Trojan          SPK-ID: 2011428
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 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01357881389104259 5.4527e-08  
a 5.328174588720192 9.8834e-08 au
q 5.255824297600979 3.4803e-07 au
i 17.30266687266766 8.3704e-06 deg
node 3.3252870732737 1.3046e-05 deg
peri 55.9180593106102 0.00028157 deg
M 297.3796003233934 0.00028197 deg
tp 2459781.910840203113
(2022-Jul-21.41084020)
0.0035192 TDB
period 4492.27254897592
12.30
0.00012499
3.422e-07
d
yr
n .08013761321807318 2.2298e-09 deg/d
Q 5.400524879839407 1.0018e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1189  
   data-arc span      21959 days (60.12 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-11-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 02:45:56  

Additional Information
 Earth MOID = 4.27888 au 
 Jupiter MOID = .0918488 au 
 T_jup = 2.909 
[ 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 11.1   n/a MPO279636  
diameter diameter 32.354 km 0.547 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
geometric albedo albedo 0.067   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

11428 Alcinoös           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Alcinoös, king of the Phaeacians, gave Odysseus shelter and aid.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000124/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 4139 P-L = 1979 HD1 = 1994 PG1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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