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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05226676916438467 5.8628e-08  
a 5.182454831985654 9.1888e-08 au
q 4.911584661577409 3.5124e-07 au
i 7.606591338880683 5.8524e-06 deg
node 15.1539392684564 3.059e-05 deg
peri 3.431117758131379 5.5101e-05 deg
M 355.7774632218245 4.347e-05 deg
tp 2459251.044354615091
(2021-Feb-05.54435462)
0.00051986 TDB
period 4309.250248684641
11.80
0.00011461
3.138e-07
d
yr
n .08354121464862403 2.2219e-09 deg/d
Q 5.453325002393898 9.6691e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1444  
   data-arc span      17313 days (47.40 yr)  
   first obs. used      1973-09-19  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52569  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 23:40:13  

Additional Information
 Earth MOID = 3.91208 au 
 Jupiter MOID = .0164452 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 11.40   n/a E2021B10  
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. 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:
[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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