Sternfinder
1
Star Finder (Celestial Globe)
1
Indicateur d’étoiles
Bedienungsanleitung
1
Operating Instructions
1
Mode d’emploi
© 2012 FPM Holding GmbH
20
3.1 S
TAR
G
LOBE
The star globe bears the star map with the fixed stars after the equinox of
1950 indicated in the Nautical Year Book of the Marine Hydrographic Service
of the GDR. The position of the stellar bodies is cartographically correctly
reproduced and also contains some weaker stars for complementing the
constellations and facilitating the discovery of certain stellar bodies in the sky.
Furthermore, the star map comprises a table of signatures for stellar
magnitudes and for variable stars. It is covered with a network of hour and
vertical circles (4) and altitude or horizontal circles (2). The hour circles,
extending over the north and south pole, have a scale interval of 15° (1 hour).
The altitude circles, whose biggest one is the equator, spread in a north-south
distance of 10°.
Three especially traced great circles are the following:
The celestial equator
(1)
The celestial meridian
(3)
The ecliptic
(5)
The celestial equator (1) is the great circle having the same distance from the
north and south pole (90°) all over the globe. It i s graduated in hours from 0
h
to
24
h
in scale intervals of 5
min
(1a) and in degrees from 0° to 360° in scale
intervals of 1° (1b). The graduation starts in the first point of Aries or vernal
point
6
(5a) and continues in the anti-clockwise direction. By request of certain
experts, an additional graduation from 0° to 180° i n the opposite direction was
attached.
The celestial meridian (3) is perpendicular to the equator in the vernal point
(
6
) and the autumnal point (
7
). It is graduated from = 0° to 90° in scale
intervals of 1° (3) on both side of the equator to the north and south pole.
The ecliptic (5) represents the apparent orbit of the sun. It is a great circle
which is inclined by 23° 27’ with respect to the eq uator and intersects in the
vernal and the autumnal points The upper side of the ecliptic bears a
graduation in dates (5c). Triangular marks (5b) for demarcating the 12 zodiacal
signs are provided in equal distances. The lower side has – starting from the
first point of Aries – a graduation (5d) that proceeds from left to right just like
the date graduation.
