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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1099011363523728 3.2772e-08  
a 2.434453473232251 7.3172e-09 au
q 2.166904270127046 8.0773e-08 au
i 5.84541014164262 3.6696e-06 deg
node 56.68579983283684 3.8535e-05 deg
peri 183.5691030546341 4.2705e-05 deg
M 46.24139396203425 1.9267e-05 deg
tp 2458822.291234438531
(2019-Dec-04.79123444)
7.409e-05 TDB
period 1387.396661415582
3.80
6.2551e-06
1.713e-08
d
yr
n .2594787849876231 1.1699e-09 deg/d
Q 2.702002676337456 8.1214e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2829  
   data-arc span      33695 days (92.25 yr)  
   first obs. used      1928-03-17  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43122  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:30:40  

Additional Information
 Earth MOID = 1.15449 au 
 Jupiter MOID = 2.29803 au 
 T_jup = 3.490 
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Orbital Elements at Epoch 2456140.5 (2012-Aug-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1105186795262427 3.2873e-08  
q 2.164617598241932 8.0962e-08 au
tp 2456048.353205460490
(2012-Apr-30.85320546)
7.1912e-05 TDB
node 56.77921137797522 3.8482e-05 deg
peri 183.399205496511 4.2582e-05 deg
i 5.850358909058665 3.6723e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2829  
   data-arc span      33695 days (92.25 yr)  
   first obs. used      1928-03-17  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .43122  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 15:30:40  

Additional Information
 Jupiter MOID = 2.29803 au 
 T_jup = 3.490 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.080645379915505E-15 -2.653139380418782E-15 -9.390927476000642E-14 -4.228087623558911E-17 -4.859520555807983E-15 9.452426314593038E-17
q -2.653139380418782E-15 6.554913282166404E-15 2.417791473002857E-13 3.556463850180162E-16 1.363677526051943E-14 -9.502110905569856E-17
tp -9.390927476000642E-14 2.417791473002857E-13 5.171273902763055E-9 2.872882565581428E-12 1.327431383714427E-9 2.592136482912621E-12
node -4.228087623558911E-17 3.556463850180162E-16 2.872882565581428E-12 1.480884585854623E-9 -1.471876428850555E-9 -4.097946094683441E-12
peri -4.859520555807983E-15 1.363677526051943E-14 1.327431383714427E-9 -1.471876428850555E-9 1.813239734689214E-9 4.734088178169234E-12
i 9.452426314593038E-17 -9.502110905569856E-17 2.592136482912621E-12 -4.097946094683441E-12 4.734088178169234E-12 1.348613660531508E-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-August); 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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