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14791 Atreus (1973 SU)
Classification: Jupiter Trojan          SPK-ID: 2014791
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1612978353554321 6.5346e-08  
a 5.144809922276224 1.0415e-07 au
q 4.31496321849792 3.931e-07 au
i 2.936709056913672 6.0832e-06 deg
node 194.7802100569048 9.7872e-05 deg
peri 185.5682916939631 9.9179e-05 deg
M 308.0840895072892 1.8436e-05 deg
tp 2459215.181867897114
(2020-Dec-31.68186790)
0.00022571 TDB
period 4262.38257872855
11.67
0.00012943
3.544e-07
d
yr
n .0844598046633783 2.5648e-09 deg/d
Q 5.974656626054528 1.2095e-07 au
  Orbit Determination Parameters
   # obs. used (total)      917  
   data-arc span      16840 days (46.11 yr)  
   first obs. used      1973-09-19  
   last obs. used      2019-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56501  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 03:51:57  

Additional Information
 Earth MOID = 3.31694 au 
 Jupiter MOID = .245699 au 
 T_jup = 2.971 
[ 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 11.8   n/a MPO416868  
diameter diameter 22.330 km 0.362 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  
rotation period rot_per 19.615 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 0.098   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2011ApJ...742...40G)  

14791 Atreus           Discovered 1973 Sept. 19 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Atreus was the son of Pelops, father of Agamemnon and Menelaos and brother of Thyestes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010309/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 1973 SU = 1999 XJ31 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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