User`s guide

ĔċęĜĆėĊĕĊĈĎċĎĈĆęĎĔēĘ
Ports RS-232 communication port on hand control, Autoguider Port, 2 Auxiliary Port, PC Port
Period Error Correction Permanently programmable
Tracking Rates Sidereal, Solar, Lunar
Tracking Modes Alt-Az, EQ North and EQ South
Alignment Procedures Sky Align, Auto Two-Star Align, Two-Star Align, Solar System Align, EQ North Align
and EQ South Align
Database 40,000+ objects, 99 user defined programmable objects.
Enhanced information on over 200 objects
Complete Revised NGC Catalog 7,840
Complete Messier Catalog 110
Complete IC Catalog 5,386
Complete Caldwell 109
Abell Galaxies 2,712
Solar System objects 9
Famous Asterisms 20
Selected CCD Imaging Objects 25
Selected SAO Stars 29,500
ǧ
A –
Absolute The apparent magnitude that a star
magnitude
would have if it were observed from a
 ͙͘ǡ͚͛Ǥ͞Ȃ
years. The absolute magnitude of the Sun is
 ͜Ǥ͠Ǥ͙͘ǡ
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
ǡ͙͞
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 ǡ
its Angular Distance above or below the celestial
horizon.
Aperture ǯǢ
the larger the aperture, the greater the telescope’s
ȂǤ
Apparent A measure of the relative brightness of a
Magnitude
 
by an observer on Earth.
Arc minute ͙Ȁ͘͞
a degree.
Arc second ͙Ȁ͛ǡ͘͘͞ȋ
͙Ȁ͘͞ȌǤ
Asterism
 ƥ
night sky.
Asteroid A small, rocky body that orbits a star.
Astrology Ƥ
ƪơǢ
astrology has nothing in common with astronomy.
Astronomical The distance between the Earth and the Sun.
unit (AU)
 ͙͜͡ǡ͟͝͡ǡ͘͘͡Ǥǡ
 ơ͙͘͝ǡ͘͘͘ǡ͘͘͘Ǥ
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 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
Ǥ
more stars revolve around one another, it is called
Ǥ
50 percent of all stars belong to binary or multiple
systems. Systems with individual components that
can be seen separately by a telescope are called
visual binaries or visual multiples. The nearest “star”
to our solar system, Alpha Centauri, is actually our
Ǥ
of three stars, two very similar to our Sun and one
dim, small, red star orbiting around one another.
C –
Celestial  ǯ
Equator
 Ǥ
into two equal hemispheres.
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