Home

Site Map

Search

physics,astronomy,education,software,applet,java,shareware,science,mathematics,computer


                      science,sun,moon,earth,optics,AC
                      circuit,chaos,fractal,sundial,TSP,neural
                      network,java,applet,programming,quiz
GeoAstro
Applets

Astronomy
physics,education,software,applet,java,shareware,science,astronomy,mathematics,computer


                    science,sun,moon,earth,optics,AC
                    circuit,chaos,fractal,sundial,TSP,neural
                    network,java,applet,programming,quiz
Chaos Game
physics,education,software,applet,java,shareware,science,astronomy,mathematics,computer


                      science,sun,moon,earth,optics,AC
                      circuit,chaos,fractal,sundial,TSP,neural
                      network,java,applet,programming,quiz
Java
physics,education,software,applet,java,shareware,science,astronomy,mathematics,computer


                    science,sun,moon,earth,optics,AC
                    circuit,chaos,fractal,sundial,TSP,neural
                    network,java,applet,programming,quiz
Miscel-

laneous
physics,education,software,applet,java,shareware,science,astronomy,mathematics,computer


                      science,sun,moon,earth,optics,AC
                      circuit,chaos,fractal,sundial,TSP,neural
                      network,java,applet,programming,quiz
Physics Quiz
physics,education,software,applet,java,shareware,science,astronomy,mathematics,computer


                    science,sun,moon,earth,optics,AC
                    circuit,chaos,fractal,sundial,TSP,neural
                    network,java,applet,programming,quiz
Who
is Who ?

back to my Astronomy JavaScript page

 Date:              Local Time:         
Location:

Longitude

deg

 
Time Zone:

 

Local Date and Time:

UT is:

the Julian Day is:

the Local Sidereal Time is:

the Declination of the Sun is:

deg

the Equation of Time is:

min


Sidereal Time Java applet


The Julian Day (JD), used in astronomical algorithms, is the number of days since noon at Greenwich on 1 Jan 4713 BC.

The sidereal time is measured by the rotation of the Earth, with respect to the stars (rather than relative to the Sun). Local sidereal time is the right ascension (RA, an equatorial coordinate) of a star on the observers meridian. One sidereal day corresponds to the time taken for the Earth to rotate once with respect to the stars and lasts approximately 23 h 56 min.

The sidereal time is a direct indication of whether a celestial object of known right ascension is observable at that instant. Applet of W. Fendt:

Last Modified: 2013, May 12

© 2001-2013 Jürgen Giesen

email