Sternfinder
1
Star Finder (Celestial Globe)
1
Indicateur d’étoiles
Bedienungsanleitung
1
Operating Instructions
1
Mode d’emploi
© 2012 FPM Holding GmbH
25
Example 3:
Observed on
2
= 35° 12’ east at
ST of observation
= 6
h
30
m
Time difference
= -2
h
00
m
GMT of observation
= 4
h
30
m
Example 4:
Observed on
2
= 14° 27’ west at
ST of observation
= 19
h
20
m
Time difference
= +1
h
00
m
GMT of observation
= 20
h
20
m
4.1.4 D
ETERMINATION OF THE LOCAL HOUR ANGLE OF
THE FIRST POINT OF
A
RIES OR VERNAL POINT
(L.H.A.
1
)
According to the Greenwich Mean Time, find the Greenwich hour angle of the
first point of Aries or vernal point (G.H.A
3
) for the day of observation in the
Nautical Year Book.
The following known relation is valid:
Local hour angle of the vernal point
= Greenwich hour angle + eastern longitude of the observational place
= Greenwich hour angle – western longitude of the observational place
+
2
east
L.H.A.
3
= G.H.A.
3
-
2
west
