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1393 Sofala (1936 KD)
Classification: Main-belt Asteroid          SPK-ID: 2001393
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1093392666106387 3.5057e-08  
a 2.433255255648441 7.7084e-09 au
q 2.167204910519358 8.6717e-08 au
i 5.847597208282055 3.8147e-06 deg
node 56.69840847946783 3.9367e-05 deg
peri 183.6447162315894 4.362e-05 deg
M 302.3398708035927 1.9917e-05 deg
tp 2458822.551158015244
(2019-Dec-05.05115802)
7.6963e-05 TDB
period 1386.372489960855
3.80
6.5879e-06
1.804e-08
d
yr
n .259670472839637 1.2339e-09 deg/d
Q 2.699305600777524 8.5513e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2595  
   data-arc span      33291 days (91.15 yr)  
   first obs. used      1928-03-17  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43664  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:22:40  

Additional Information
 Earth MOID = 1.15467 au 
 Jupiter MOID = 2.30122 au 
 T_jup = 3.491 
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Orbital Elements at Epoch 2455945.5 (2012-Jan-19.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1105488065829342 3.5091e-08  
q 2.164595228624078 8.6933e-08 au
tp 2456048.503460860035
(2012-May-01.00346086)
7.3695e-05 TDB
node 56.77916134330591 3.9334e-05 deg
peri 183.4480174342323 4.3485e-05 deg
i 5.850424667534297 3.8161e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2595  
   data-arc span      33291 days (91.15 yr)  
   first obs. used      1928-03-17  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43664  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-29 19:22:40  

Additional Information
 Jupiter MOID = 2.30122 au 
 T_jup = 3.491 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.231367203408893E-15 -3.041312243743334E-15 -2.099238315101347E-13 1.442365153008444E-16 -2.663689980625875E-14 -1.680040249145932E-17
q -3.041312243743334E-15 7.557279336553871E-15 5.51519767340812E-13 -1.231718993424913E-16 7.200625620780109E-14 2.281226945336918E-16
tp -2.099238315101347E-13 5.51519767340812E-13 5.430923889082802E-9 1.972368617933428E-12 1.383028999555303E-9 3.239994632080201E-12
node 1.442365153008444E-16 -1.231718993424913E-16 1.972368617933428E-12 1.547187521164314E-9 -1.538031032030825E-9 -6.850718474348427E-12
peri -2.663689980625875E-14 7.200625620780109E-14 1.383028999555303E-9 -1.538031032030825E-9 1.890983521406772E-9 7.622519156585458E-12
i -1.680040249145932E-17 2.281226945336918E-16 3.239994632080201E-12 -6.850718474348427E-12 7.622519156585458E-12 1.456264081094233E-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 12.1   n/a MPO384760  
diameter diameter 11.214 km 0.495 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 16.5931 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 sidereal period (not synodic); Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Hanus, J.; Durech, J.; Broz, M.; Marciniak, A.; et al. (2013) Astron. Astrophys. 551, A67.]
geometric albedo albedo 0.223   0.046 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1393 Sofala (1936 KD)          Discovered 1936-May-25 by Jackson, C. at Johannesburg (UO)
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1936 KD = 1928 FB = 1951 GL = 1956 TE = 1958 CA = 1971 SJ = 1975 UB 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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