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JPL Small-Body Database Browser
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588 Achilles (A906 DN)
Classification: Jupiter Trojan          SPK-ID: 2000588
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 71 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1465655545434104 4.9458e-08  
a 5.209479964083584 6.7452e-08 au
q 4.445949644264887 2.71e-07 au
i 10.31912040441233 5.7411e-06 deg
node 316.5354815538993 2.7219e-05 deg
peri 133.3589215587072 3.2942e-05 deg
M 238.460897841276 2.1194e-05 deg
tp 2460066.734749374031
0.0002736 TDB
period 4343.001555872223
n .08289198043533735 1.6099e-09 deg/d
Q 5.97301028390228 7.7338e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1705  
   data-arc span      41454 days (113.49 yr)  
   first obs. used      1906-02-22  
   last obs. used      2019-08-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51831  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-23 19:10:12  

Additional Information
 Earth MOID = 3.47306 au 
 Jupiter MOID = .571055 au 
 T_jup = 2.946 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.67   n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
diameter diameter 130.099 km 0.554 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
rotation period rot_per 7.306 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Angeli, C.A.; Lazzaro, D.; Florczak, A.; Betzler, A.S.; Carvano, J.M. (1999) Planet. Space Sci. 47, 699-714.]
[Shevchenko, V.G.; Krugly, Yu.N.; Belskaya, N.; Chirony, V.G.; et al. (2009) Lunar & Planetary Sci. XL, #1391.]
[Stephens, R.D. (2010) Minor Planet Bull. 37, 47-48.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Shevchenko, V.G.; Belskya, I.N.; Slyusarev, L.G.; Krugly, Yu.N.; et al. (2012) Icarus 217, 202-208.]
geometric albedo albedo 0.043   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
B-V BV 0.755   0.033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.65, mean=3.34, max.=3.58) deg.
U-B UB 0.216   0.030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=4; phase (min.=2.65, mean=3.34, max.=3.58) deg.
Tholen spectral type spec_T DU   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 7 color indices

588 Achilles (A906 DN)          Discovered 1906-Feb-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2019-Oct-21 23:52 UT
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