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5144 Achates (1991 XX)
Classification: Jupiter Trojan          SPK-ID: 2005144
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 48 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2733694666918834 4.8113e-08  
a 5.192841687944362 6.5844e-08 au
q 3.773277325095632 2.7639e-07 au
i 8.915942821277167 4.4561e-06 deg
node 322.8171214709718 2.551e-05 deg
peri 331.5465622356272 2.6848e-05 deg
M 281.9410903763927 1.3249e-05 deg
tp 2459937.686514043648
(2022-Dec-24.18651404)
0.00016865 TDB
period 4322.211861305294
11.83
8.2207e-05
2.251e-07
d
yr
n .08329068809025968 1.5842e-09 deg/d
Q 6.612406050793092 8.3843e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2537  
   data-arc span      25976 days (71.12 yr)  
   first obs. used      1949-05-04  
   last obs. used      2020-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44904  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:16:55  

Additional Information
 Earth MOID = 2.76099 au 
 Jupiter MOID = .565792 au 
 T_jup = 2.901 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.0   n/a MPO253398  
diameter diameter 80.958 km 0.530 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 5.958 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Molnar, L.A.; Haegert, M.J.; Hoogenboom, K.M. (2008) Minor Planet Bull. 35, 82-84.]
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bull. 42, 216-224.]
[Stephens, R.D.; Warner, B.D. (2018) Minor Planet Bull. 45, 301-304.]
[Stephens, R. D.; Warner, B. D. (2019) MPB 46, 315-317.]
geometric albedo albedo 0.074   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

5144 Achates (1991 XX)          Discovered 1991-Dec-02 by Shoemaker, C. S. at Palomar
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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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