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5126 Achaemenides (1989 CH2)
Classification: Jupiter Trojan          SPK-ID: 2005126
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02543770662786268 3.1872e-08  
a 5.243537511049713 8.2e-08 au
q 5.110153942151436 1.8879e-07 au
i 29.86217847815296 5.9602e-07 deg
node 116.4966119775212 4.1638e-06 deg
peri 350.9424759564725 5.9311e-05 deg
M 264.643406863281 6.3815e-05 deg
tp 2460362.171196637176
(2024-Feb-21.67119664)
0.00079274 TDB
period 4385.660362150104
12.01
0.00010288
2.817e-07
d
yr
n .08208569982001687 1.9255e-09 deg/d
Q 5.376921079947988 8.4086e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1724  
   data-arc span      24843 days (68.02 yr)  
   first obs. used      1953-01-09  
   last obs. used      2021-01-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 17:10:34  

Additional Information
 Earth MOID = 4.12763 au 
 Jupiter MOID = .14726 au 
 T_jup = 2.733 
[ 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 10.62   n/a E2021B10  
diameter diameter 51.922 km 3.356 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 53.02 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 15-22.]
geometric albedo albedo 0.050   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

5126 Achaemenides (1989 CH2)          Discovered 1989-Feb-01 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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