Celestron StarSense 94008 Buku Petunjuk - Halaman 2

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7. The automatic alignment will now begin. EQ mounts will slew to two

points in the western sky and then two points in the eastern sky to

obtain alignment references. AZ mounts will slew to three points

around the sky. If you previously performed a Center Calibration, you

can now use SSAG to locate objects. If you have not completed a

Center Calibration, SkyPortal will prompt you to do so. Proceed to

step 8.

8. Center Calibration aligns SSAG's ﬁ eld of view with the telescope's

ﬁ eld of view. This step generally only needs to be done once because

SSAG saves Center Calibration data in its internal memory. The next

time you connect to SSAG with the app, you will not need to center

calibrate again unless you have moved the SSAG onto a different

telescope optical tube.

a. To Center Calibrate, choose a star from the planetarium interface,

then press "GoTo." The telescope will slew close to the star, but the

star may not be in the telescope's ﬁ eld of view.

b. Use the on-screen direction buttons to precisely center the star in

the telescope's ﬁ eld of view. When you are ﬁ nished, press "Align" at

the bottom of the screen. Then press "Calibrate."

c. The app will complete the Center Calibration process.

You are now ready to use SSAG to ﬁ nd objects in the night sky. Simply

select an object in the app and tap "GoTo." Precise GoTo functionality

is on by default, so stars should appear well-centered within the

telescope's ﬁ eld of view. When SSAG is performing Precise GoTo, the

app will display "Star Sensing."

Guiding

Initiating autoguiding with SSAG through the SkyPortal app is easy.

Press the "play" (forward-facing triangle) button in the Guiding Bar

shown near the top of the planetarium interface.

SSAG will automatically calibrate itself for guiding and then begin

guiding. After guiding begins, the play button will change to a stop

(square) button.

The Guiding Bar displays data about guiding performance—RA and Dec

RMS tracking errors and the "S" and "Q" numbers. The "S" number is the

number of stars SSAG is using for guiding. The "Q" number represents

the quality of the guiding, essentially a measurement of current seeing

conditions—zero is poor, while 100 is ideal.

Press the "stop" button in the Guiding Bar to stop guiding.

You must reinitiate guiding by pressing the play button after you slew to

a new object. Doing so allows SSAG to recalibrate itself for guiding on a

different point in the sky.

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Polar Alignment

Polar alignment assistance with SSAG is currently unavailable through

the SkyPortal app. However, SkyPortal supports the All-Star Polar

Alignment (ASPA) procedure for accurate polar alignment of your mount.

Remember, you must perform a sky alignment again after performing

ASPA, as you will be moving the entire mount. SkyPortal will prompt you

to realign after completing ASPA.

Other Alignment Methods

On the Scope Setup screen (Settings Menu > Setup and Control, or

just press the Celestron Settings icon), you can select a couple of other

alignment options.

StarSense Manual Align

StarSense Manual Align lets you manually slew the telescope to

alignment points you choose instead of automatic preset points. If your

observing site has many obstructions or clouds passing through, you

may ﬁ nd StarSense Manual faster and more convenient than StarSense

Auto. To use StarSense Manual, select "Align Using StarSense Manual"

from the Scope Setup screen. Now, the next time you choose "Connect

and Align," the app will prompt you to perform a StarSense Manual Align.

Follow the on-screen instructions. You can slew the telescope to any

position in the sky that is free of obstructions. Keep alignment points at

least 30° away from each other in both axes.

StarSense Single-Point Align

StarSense Single-Point Align allows you to align by manually slewing

to only one area of the sky. It is the fastest way to align but provides

the least accurate pointing model for the mount. But remember, SSAG

will still use its Precise GoTo functionality to center objects accurately,

so this fast procedure may be all you need for casual observing. You

can also add additional alignment points later to improve your mount's

accuracy using the Align>Align command (see below). To use StarSense

Single-Point, select "Align Using StarSense Single-Point" from the

Scope Setup screen. The next time you "Connect and Align," you will

be prompted to perform a StarSense Single-Point Align. Follow the on-

screen instructions.