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8
Slew Speeds
AutoStar has nine slew speeds that are directly proportional to the sidereal rate (this is the
speed at which stars move) and have been calculated to accomplish specific functions.
Pressing the SPEED/? key changes the slew speed, which is then shown for about two sec-
onds on A
utoStar’s display.
The nine available speeds are:
Number K
ey 1 = 1x = 1 x sidereal (0.25 arc-min/sec or 0.004°/sec)
Number Key 2 = 2x = 2 x sidereal (0.5 arc-min/sec or 0.008°/sec)
Number Key 3 = 8x = 8 x sidereal (2 arc-min/sec or 0.033°/sec)
Number K
ey 4 = 16x = 16 x sidereal (4 arc-min/sec or 0.067°/sec)
Number Key 5 = 64x = 64 x sidereal (16 arc-min/sec or 0.27°/sec)
Number Key 6 = 128x = 30 arc-min/sec or 0.5°/sec
Number Key 7 = 1.0° = 60 arc-min/sec or 1.0°/sec
Number Key 8 = 1.5° = 90 arc-min/sec or 1.5°/sec
Number Key 9 = Max = approx. 4.5°/sec
Speeds 1, 2, or 3: Best used for fine centering of an object in the field of view of a higher power
eyepiece, such as a 12mm or a 9mm eyepiece.
Speeds 4, 5, or 6: Enables centering an object in the field of a low-to-moderate power eye-
piece, such as a standard 25mm eyepiece.
Speeds 7 or 8: Best used for rough centering of an object in the eyepiece.
Speed 9: Moves the telescope quickly from one point in the sky to another.
DS-2000 TIPS
Which One’s the
Alignment Star?
If Autostar has chosen an alignment star with
which y
ou are unf
amiliar, how can you be
sure if the star in your eyepiece is really the
alignment star?
The r
ule of thumb is that an alignment star is
usually the brightest star in that area of the
sky
.
When y
ou vie
w an alignment star in an
eyepiece, it stands out dramatically from the
rest of the stars in that portion of the sky.
If y
ou ha
v
e an obstruction, such as a tree or
a building blocking your view of the alignment
star, or if you have any doubts at all about the
star that has been chosen, no prob
lem. Just
press the Scroll Down key and Autostar will
find another star to align upon.