Bedienungsanleitung Celestron LCM Series (Seite 24 von 35) (Englisch)

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meChanICal speCIfICaTIons

Motor: Type / Resolution DC Servo motors with encoders, both axes / 0.691 arc seconds

Slew speeds Nine slew speeds: 3º /sec, 2º /sec, 1º/sec, 64x, 32x, 16x, 8x, 4x, 2x

Hand Control

Double line, 16 character Liquid Crystal Display

19 ﬁber optic backlit LED buttons

sofTware speCIfICaTIons

Ports RS-232 communication port on hand control

Tracking Rates Sidereal, Solar and Lunar

Tracking Modes Alt-Az, EQ North & EQ South

Alignment Procedures Sky Align, Auto Two-Star, Two-Star, One-Star, Solar System Align

Database

99 user deﬁned programmable objects

Expanded information on over 100 objects

Total Object Database 4,033 Objects

appendIx b - glossary of Terms

A –

Absolute The apparent magnitude that a star

magnitude would have if it were observed from a

standard distance of 10 parsecs, or 32.6 light–

years. The absolute magnitude of the Sun is

4.8. at a distance of 10 parsecs, it would just

be visible on Earth on a clear moonless night

away from surface light.

Airy disk The apparent size of a star’s disk produced

even by a perfect optical system. Since

the star can never be focused perfectly, 84

per cent of the light will concentrate into a

single disk, and 16 per cent into a system of

surrounding rings.

Alt–Azimuth A telescope mounting using two

Mounting independent rotation axes allowing

movement of the instrument in Altitude

and Azimuth.

Altitude In astronomy, the altitude of a celestial object

is its Angular Distance above or below the

celestial horizon.

Aperture The diameter of a telescope’s primary lens or

mirror;thelargertheaperture,thegreaterthe

telescope’s light–gathering power.

Apparent A measure of the relative brightness of a

Magnitude star or other celestial object as perceived

by an observer on Earth.

Arc minute A unit of angular size equal to 1/60 of

a degree.

Arc second A unit of angular size equal to 1/3,600 of a

degree(or1/60ofanarcminute).

Asterism A small unofﬁcial grouping of stars in the

night sky.

Asteroid A small, rocky body that orbits a star.

Astrology The pseudoscientiﬁc belief that the positions

of stars and planets exert an inﬂuence on

humanaffairs;astrologyhasnothingin

common with astronomy.

Astronomical The distance between the Earth and the Sun.

unit (AU) It is equal to 149,597,900 km., usually

rounded off to 150,000,000 km.

Aurora The emission of light when charged particles

from the solar wind slams into and excites

atoms and molecules in a planet’s

upper atmosphere.

Azimuth The angular distance of an object eastwards

along the horizon, measured from due north,

betweentheastronomicalmeridian(the

vertical line passing through the center of the

sky and the north and south points on the

horizon)andtheverticallinecontainingthe

celestial body whose position is to

be measured.

B –

Binary Stars Binary(Double)starsarepairsofstars

that, because of their mutual gravitational

attraction, orbit around a common center of

mass. If a group of three or more stars revolve

around one another, it is called a multiple

system. It is believed that approximately

50 percent of all stars belong to binary or

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Celestron LCM Series Seite 24

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