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12974 Halitherses (1973 SB2)
Classification: Jupiter Trojan          SPK-ID: 2012974
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05174212306952927 6.827e-08  
a 5.181386297300258 1.0803e-07 au
q 4.913290369834575 4.2156e-07 au
i 7.607110315301373 5.9513e-06 deg
node 15.1531110492292 4.0432e-05 deg
peri 2.822567622374488 6.8268e-05 deg
M 306.16980395551 5.6374e-05 deg
tp 2459244.655687856393
(2021-Jan-30.15568786)
0.00067619 TDB
period 4307.917575418866
11.79
0.00013473
3.689e-07
d
yr
n .08356705849113108 2.6136e-09 deg/d
Q 5.44948222476594 1.1362e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1083  
   data-arc span      16839 days (46.10 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57117  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:39:36  

Additional Information
 Earth MOID = 3.91421 au 
 Jupiter MOID = .0150022 au 
 T_jup = 2.980 
[ 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 11.3   n/a MPO439182  
diameter diameter 24.746 km 0.551 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 6.971 h n/a LCDB (Rev. 2019-January); 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:
[Ryan, E.L.; Sharkey, B.N.L.; Woodward, C.E. (2017) Astron. J. 153, A116.]
[Szabo, Gy.M.; Pal, A.; Kiss, Cs.; Kiss, L.L.; et al. (2017) Astron. Astrophys. 599, A44.]
geometric albedo albedo 0.087   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

12974 Halitherses           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Halitherses was an augur in Ithaca. He went together with Telemachos to search for Odysseus. He was also a friend of Odysseus himself.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1973 SB2 = 1996 RF32 = 1998 WE18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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