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588 Achilles (1906 TG)
Classification: Jupiter Trojan          SPK-ID: 2000588
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 58 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1470424668146678 4.9843e-08  
a 5.205918323779896 7.1479e-08 au
q 4.44042725141562 2.7185e-07 au
i 10.3151821850313 6.2153e-06 deg
node 316.5629878760807 3.2048e-05 deg
peri 133.5794649348623 3.8329e-05 deg
M 138.5970210047956 2.1033e-05 deg
tp 2455730.194746852911
(2011-Jun-17.69474685)
0.00025013 JED
period 4338.548453448695
11.88
8.9354e-05
2.446e-07
d
yr
n .08297706107530904 1.709e-09 deg/d
Q 5.971409396144172 8.1989e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1196  
   data-arc span      39960 days (109.40 yr)  
   first obs. used      1906-02-22  
   last obs. used      2015-07-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57288  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Oct-05 13:05:37  

Additional Information
 Earth MOID = 3.46702 au 
 Jupiter MOID = .566543 au 
 T_jup = 2.946 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.67 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
diameter diameter 135.47 km 4.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
rotation period rot_per 7.306 h n/a LCDB (Rev. 2015-December); 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) 40th LPSC, #1391.]
[Stephens, R.D. (2010) Minor Planet Bul. 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 0.0328   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 15
B-V BV .755 mag .033 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=4; phase (min.=2.65, mean=3.34, max.=3.58) deg.
U-B UB .216 mag .030 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #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 (1906 TG)          Discovered 1906-Feb-22 by Wolf, M. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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