Sternfinder
1
Star Finder (Celestial Globe)
1
Indicateur d’étoiles
Bedienungsanleitung
1
Operating Instructions
1
Mode d’emploi
© 2012 FPM Holding GmbH
29
Example 8:
Approximated observational place
Standard time of observation
5
= 38° 45’ N,
2
= 29° 32’ W
S.T. = 7
h
15
m
on January 10, 1953
observation
a)
1
altitude = 25.5°
b)
1
altitude = 25°
azimuth = 266°
azimuth = 50°
S.T. of observation
7
h
15
m
Time difference between T.D. and G.M.T.
+ 2
h
00
m
G.M.T. of observation on January 10, 1953
9
h
15
m
G.H.A.
3
for 9
h
G.M.T.
(Nautical Year Book)
244° 35.3’
for 15
m
(tables of Nautical Year
Book)
+3°
45.6’
G.H.A.
3
for 9
h
15
m
G.M.T.
248° 20.9’
western longitude
-29° 32.0’
L.H.A.
3
for place and time of observation
218° 48.9’
Stellar body observed a) Regulus
Stellar body observed b) Deneb
4.3 S
EARCHING FOR A
S
TAR SPECIFIED BY
N
AME
IN THE STARRY
S
KY
The geographic longitude and latitude of the observational place are
approximately known like in item 4.2. Now find out the azimuth and altitude of
the stellar body known by its name and search for it in the starry sky.
4.3.1 Set the star globe to the geographic latitude
4
of the observational place
according to item 4.1.1 again
4.3.2 After having found out the time of observation and the geographic
longitude
2
of the observational place, calculate the L.H.A.
3
in exactly the
same way as described in item 4.1.5
4.3.3 Setting the star globe to the time of observation is done again by setting
the L.H.A.
3
below the undivided southern half of the vertical semicircle as
described in item 4.2.2.