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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1477275390612377 2.298e-08  
a 5.20906173502059 5.5382e-08 au
q 4.439539864087937 1.4729e-07 au
i 10.31997820848735 4.3244e-07 deg
node 316.5368846161261 5.7515e-06 deg
peri 133.4075941437981 1.238e-05 deg
M 304.5375982834296 1.3997e-05 deg
tp 2460065.511918706048
(2023-May-01.01191871)
0.00017591 TDB
period 4342.478567101441
11.89
6.9253e-05
1.896e-07
d
yr
n .08290196357613719 1.3221e-09 deg/d
Q 5.978583605953243 6.3563e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      42172 days (115.46 yr)  
   first obs. used      1906-02-22  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:08:28  

Additional Information
 Earth MOID = 3.46668 au 
 Jupiter MOID = .57462 au 
 T_jup = 2.946 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456994.5 (2014-Dec-03.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1476696537701099 2.2849e-08  
q 4.43452349270245 1.4575e-07 au
tp 2455730.168387503521
(2011-Jun-17.66838750)
0.00013801 TDB
node 316.5798676532514 5.7583e-06 deg
peri 133.4210510642563 1.2401e-05 deg
i 10.31524824231901 4.3299e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      42172 days (115.46 yr)  
   first obs. used      1906-02-22  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .44347  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:08:28  

Additional Information
 Jupiter MOID = .57462 au 
 T_jup = 2.946 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.220751334444049E-16 -3.183052454932934E-15 -8.191009087303715E-13 5.72437293985455E-15 -1.113695300319721E-13 -2.433880934893118E-15
q -3.183052454932934E-15 2.124191759606941E-14 6.672874040973933E-12 -3.826860362465845E-14 8.628751931020266E-13 1.488008661532197E-14
tp -8.191009087303715E-13 6.672874040973933E-12 1.904681945219576E-8 -4.70383089061121E-11 1.490932199028483E-9 1.737796199353576E-11
node 5.72437293985455E-15 -3.826860362465845E-14 -4.70383089061121E-11 3.31582514252232E-11 -3.541928662974541E-11 1.786741001990623E-12
peri -1.113695300319721E-13 8.628751931020266E-13 1.490932199028483E-9 -3.541928662974541E-11 1.537804937335483E-10 -3.064658780566337E-13
i -2.433880934893118E-15 1.488008661532197E-14 1.737796199353576E-11 1.786741001990623E-12 -3.064658780566337E-13 1.874810965055805E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 8.26   n/a MPO636069 IRAS observations used: 15
diameter diameter 130.099 km 0.554 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 7.306 h n/a LCDB (Rev. 2020-October); 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] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
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 ]
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