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12714 Alkimos (1991 GX1)
Classification: Jupiter Trojan          SPK-ID: 2012714
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03582662105326855 4.547e-08  
a 5.234946037385566 7.9412e-08 au
q 5.047395609469843 2.8049e-07 au
i 9.505975668107604 4.887e-06 deg
node 298.8929576511272 3.1254e-05 deg
peri 162.7379469230301 8.6393e-05 deg
M 264.6818926255254 8.1921e-05 deg
tp 2460158.849593131953
(2023-Aug-02.34959313)
0.0010022 TDB
period 4374.886000298136
11.98
9.9548e-05
2.725e-07
d
yr
n .08228785846659023 1.8724e-09 deg/d
Q 5.422496465301288 8.2257e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1823  
   data-arc span      11201 days (30.67 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:51:08  

Additional Information
 Earth MOID = 4.06551 au 
 Jupiter MOID = .200003 au 
 T_jup = 2.971 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457250.5 (2015-Aug-16.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03663217225984693 4.5683e-08  
q 5.035174414165645 2.813e-07 au
tp 2455811.744906197912
(2011-Sep-07.24490620)
0.00095609 TDB
node 298.9069902827555 3.1263e-05 deg
peri 164.4132384826184 8.4626e-05 deg
i 9.508040014890382 4.8882e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1823  
   data-arc span      11201 days (30.67 yr)  
   first obs. used      1990-02-24  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42914  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:51:08  

Additional Information
 Jupiter MOID = .200003 au 
 T_jup = 2.971 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.086960220289587E-15 -1.245935396320563E-14 3.9878446542812E-12 -1.893606218645888E-15 3.558974473671894E-13 1.841562146750549E-16
q -1.245935396320563E-14 7.913131823406295E-14 -8.402149455532164E-12 1.31663144103109E-14 -7.012025501991703E-13 8.345272701360937E-16
tp 3.9878446542812E-12 -8.402149455532164E-12 9.141142958770749E-7 -1.260034989845026E-10 7.524956572379136E-8 1.948976212240217E-11
node -1.893606218645888E-15 1.31663144103109E-14 -1.260034989845026E-10 9.77373091850804E-10 -9.740333008038579E-10 6.068144042182971E-11
peri 3.558974473671894E-13 -7.012025501991703E-13 7.524956572379136E-8 -9.740333008038579E-10 7.161635891144096E-9 -5.818328116695871E-11
i 1.841562146750549E-16 8.345272701360937E-16 1.948976212240217E-11 6.068144042182971E-11 -5.818328116695871E-11 2.389459912454309E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 10.2   n/a MPO452349  
diameter diameter 47.819 km 1.161 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 28.48 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[French, L.M.; Stephens, R.D.; Coley, D.R.; Megna, R.; Wasserman, L.H. (2012) Minor Planet Bull. 39, 183-187.]
geometric albedo albedo 0.070   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

12714 Alkimos           Discovered 1991 Apr. 15 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Akimos was a son of Ares. Together with Automedon, he was in charge of Achilles' horses. After the death of Patroclus, they were the most honored of the companions of Achilles.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001013/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 1991 GX1 = 1990 EY1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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