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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 54 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1476617981145202 5.0771e-08  
a 5.202862449817134 7.416e-08 AU
q 4.434598425134618 2.7985e-07 AU
i 10.3152305727792 6.6707e-06 deg
node 316.5797201983182 3.2084e-05 deg
peri 133.4236133098195 3.8905e-05 deg
M 105.5005963537911 2.1363e-05 deg
tp 2455730.176426846547
(2011-Jun-17.67642685)
0.00025681 JED
period 4334.728922305374
11.87
9.2679e-05
2.537e-07
d
yr
n .08305017602081984 1.7757e-09 deg/d
Q 5.971126474499649 8.5111e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      1141  
   data-arc span      39843 days (109.08 yr)  
   first obs. used      1906-02-22  
   last obs. used      2015-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58114  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:01:03  

Additional Information
 Earth MOID = 3.46138 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-May); 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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