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5144 Achates (1991 XX)
Classification: Jupiter Trojan          SPK-ID: 2005144
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2710394323979642 5.5814e-08  
a 5.206941401985548 9.5187e-08 AU
q 3.795654959861925 2.9795e-07 AU
i 8.900874451113085 5.3094e-06 deg
node 322.8291585259172 3.6251e-05 deg
peri 331.5228250243803 3.71e-05 deg
M 115.5803276067524 1.0375e-05 deg
tp 2455607.170338498106
(2011-Feb-14.67033850)
0.0001226 JED
period 4339.827447516059
11.88
0.000119
3.258e-07
d
yr
n .08295260683833165 2.2747e-09 deg/d
Q 6.618227844109171 1.2099e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      1117  
   data-arc span      23689 days (64.86 yr)  
   first obs. used      1949-05-04  
   last obs. used      2014-03-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53391  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:11:08  

Additional Information
 Earth MOID = 2.78454 AU 
 T_jup = 2.902 
[ 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 9.0 mag n/a MPO253398  
diameter diameter 91.91 km 5.1 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5
rotation period rot_per 5.958 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Published Reference List:
[Molnar, L.A.; Haegert, M.J.; Hoogenboom, K.M. (2008) Minor Planet Bul. 35, 82-84.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
geometric albedo albedo 0.0576   0.007 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 5

5144 Achates (1991 XX)          Discovered 1991-Dec-02 by Shoemaker, C. S. at Palomar (675)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1991 XX = 1939 PC = 1951 PK = 1975 QA = 1987 QV11 = 1988 SS4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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