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 ]  
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05209616417644262 6.5355e-08  
a 5.181814292950015 1.0256e-07 au
q 4.911861644812655 4.0045e-07 au
i 7.60700129231502 5.9056e-06 deg
node 15.15327771018184 3.8463e-05 deg
peri 3.184056471550732 6.4402e-05 deg
M 339.2865801081072 5.1925e-05 deg
tp 2459248.396561042866
(2021-Feb-02.89656104)
0.00062118 TDB
period 4308.451353818265
11.80
0.00012792
3.502e-07
d
yr
n .08355670528366495 2.4808e-09 deg/d
Q 5.451766941087376 1.0791e-07 au
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      17120 days (46.87 yr)  
   first obs. used      1973-09-19  
   last obs. used      2020-08-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56358  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-25 00:38:54  

Additional Information
 Earth MOID = 3.91367 au 
 Jupiter MOID = .0166314 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-August); 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2020-Oct-25 06:40 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin