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5450 Sokrates (2780 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2005450
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1199548629276279 1.2065e-08  
a 2.817592885237999 1.188e-08 au
q 2.479608916903415 3.6013e-08 au
i 5.243406351118975 3.6163e-07 deg
node 145.1020086907294 6.8155e-06 deg
peri 319.9583655555149 1.0918e-05 deg
M 235.4234626269834 1.1155e-05 deg
tp 2459994.291237056779
(2023-Feb-18.79123706)
5.5582e-05 TDB
period 1727.490985690649
4.73
1.0925e-05
2.991e-08
d
yr
n .2083947198462934 1.318e-09 deg/d
Q 3.155576853572583 1.3305e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2479  
   data-arc span      25887 days (70.87 yr)  
   first obs. used      1950-08-12  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .42936  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-07 23:54:35  

Additional Information
 Earth MOID = 1.49944 au 
 Jupiter MOID = 1.96574 au 
 T_jup = 3.302 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.43   n/a E2021B10  
diameter diameter 20.526 km 0.154 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 5.9822 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Clark, M. (2014) Minor Planet Bull. 41, 178-183.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.050   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

5450 Sokrates (2780 P-L)          Discovered 1960-Sep-24 by van Houten and Gehrels at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 2780 P-L = 1950 PH = 1953 FJ1 = 1962 BC = 1967 EP = 1974 SG3 = 1977 JW = 1978 PX = 1988 RW11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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