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19364 Semafor (1997 SM1)
Classification: Main-belt Asteroid          SPK-ID: 2019364
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075073503972533 3.92e-08  
a 2.681138447428106 1.1268e-08 au
q 2.392896356896905 1.0252e-07 au
i 13.40434629614668 3.9987e-06 deg
node 199.0311284005627 1.4318e-05 deg
peri 6.682740711703278 2.1313e-05 deg
M 201.1736778633583 1.7221e-05 deg
tp 2459707.952468129852
(2022-May-08.45246813)
7.808e-05 TDB
period 1603.530731559959
4.39
1.0109e-05
2.768e-08
d
yr
n .2245045841121998 1.4153e-09 deg/d
Q 2.969380537959307 1.2479e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2286  
   data-arc span      24517 days (67.12 yr)  
   first obs. used      1953-09-16  
   last obs. used      2020-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .42336  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:09:13  

Additional Information
 Earth MOID = 1.38982 au 
 Jupiter MOID = 1.98928 au 
 T_jup = 3.329 
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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 12.8   n/a MPO502315  
diameter diameter 7.058 km 0.132 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.204   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

19364 Semafor           Discovered 1997 Sept. 21 by L. Šarounová at Ondřejov.
Theatre Semafor was a special phenomenon of Prague cultural life in the 1960s, with leading personalities Jiří Suchý (b. 1931) and Jiří Šlitr (1924-1969). Many of their songs became popular and they can be still heard by campfires. The name was suggested by L. Vašta.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

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