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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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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1073097877533401 1.7729e-08  
a 2.681720665024656 9.7569e-09 au
q 2.393945789647114 4.9276e-08 au
i 13.40282364419118 1.1703e-06 deg
node 199.0254741752106 3.7727e-06 deg
peri 6.621598152881321 1.0863e-05 deg
M 246.1309475177629 1.2573e-05 deg
tp 2459707.866677955953
(2022-May-08.36667796)
5.693e-05 TDB
period 1604.053077482451
4.39
8.7541e-06
2.397e-08
d
yr
n .2244314761485432 1.2248e-09 deg/d
Q 2.969495540402197 1.0804e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2648  
   data-arc span      24661 days (67.52 yr)  
   first obs. used      1953-09-16  
   last obs. used      2021-03-24  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40219  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:53:19  

Additional Information
 Earth MOID = 1.39004 au 
 Jupiter MOID = 1.98802 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 12.75   n/a E2021B10  
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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