4. Astro Session Workflows

ASIAIR Based Workflow

updated: 2023-08-03


Final equipment set-up, calibration and picture shooting. For a detailed description of the ASIAIR Pro see the ASIAIR Pro Hardware chapter.


hopefully many good raw pictures...

Previous Step

Equipment Setup

Next Step

Picture Post Processing

ASIAIR Installation and Activation Steps


What to Do


Install all cables

 and the power supply


Connect and power up the Mount

The procedure for connecting your scope (mount) varies by brand and model.

WARNING: Some mounts require too much power to be controlled by the ASIAIR unit. A better way to power the mount is to use a 12V 5.5mm cable splitter between the power supply and the mount.

 Please refer to the Connecting Your Mount section for the details


Check Cables Positions and Length

Manually rotate the telescope 90° left and right to make sure the cables are not caught, then return the telescope to its zero position.


Power Up

Turn on the power and wait for the ASIAIR to beep once


Start the ASIAIR App

Connect your mobile device to the same WiFi network used by the ASIAIR. On your mobile device, search for SSID ASIARI_xxxx (in AP mode).

 password: 12345678  *)


ASIAIR Start Screen


Connection Failed

If the connection has not yet been established, you will see this:

In this case, please check your network settings on your mobile device, and also check if ASIAIR is ready.


Connection Established

Once connected you should see this screen


DST and Time setting

always set DST to NO on your mount

please refer to the chapter Time and DST settings


Check the detail settings

please refer to the chapter Setting up the ASIAIR Pro



Start cooling the main camera to, for example, 0°C if temperatures are above 0°C, and later to -10°C or -20°C to reduce thermal stress.

In the Main camera section of the ASIAIR app


Zero Position Alignment

Check again that the Telescope is in the Zero Position and then set the Zero Position using the hand control of your mount to make sure the Zero Positions on the ASIAIR and the mount correspond with each other.

Check again that the telescope is in the zero position and then adjust the zero position using your mount's hand control to ensure that the zero positions on the ASIAIR and the mount match.


Guide Camera Focusing

Fastest path: Fine Adjusting the Guide Camera Focus using the ASIAIR Focus Function

For a good start set:

    • the coarse focus to 2.0 
    • and the microspeed fine focus to 2.25 


Main Camera Focusing

Set the focus of the main camera or Auto Focus with ASIAIR PRO and ZWO EAF

Fast path (since V1.9):

  1. Perform a rough manual polar alignment
  2. Find a bright star to focus on
  3. Open the sky atlas on the ASIAIR
  4. Find a bright star (e.g. Arcturus in summer)
  5. Center the star in the display
  6. GoObject (will rotate to the region and start disk solving, may fail a few times but is often successful!)
  7. Align the coordinates to the mount as a rough first star alignment
  8. Start the ASIAIR autofocus function with the bright star in the center.
  9. Slew telescope back to Zero Position

EAF Position Examples by Optical Configuration

TS600AS294: 20393

TS1624rAS294: 17062


Polar Alignment

With telescope in Zero Position:


Slew back to Zero-Position

  • Use the mount's hand controller to slew back to the home (zero) position.
  • Check the final position against the markings on the mount, especially the R.A. Zero Position.
  • If the R.A. Zero Position doesn't match the mark (see picture on the right), this will result in incorrect telescope pointing at the start of the alignment step and may be a result of incorrect DST settings.
  • In this case, loosen the 4 R.A. Clutch Screws and manually rotate the R.A. Axis until the marks on the axis align.


Do a  1-star alignment

Fast Path: 

  1. Go to a bright star to focus
  2. Open the sky atlas on the ASIAIR
  3. Find a bright star (e.g. Arcturus in summer)
  4. Center the star in the display
  5. GoObject (will rotate to the region and start disk solving, may fail a few times but is often successful!)
  6. Align the coordinates to the mount as a rough first star alignment.

Alternate method: use the mount hand controller to do a star alignment.


Camera Rotation Alignment

Make sure your camera orientation matches your intended target orientation. This is especially important if you plan to take mosaic images.

Verify that the camera orientation is as shown on the right as the Initial Camera Orientation before starting the Camera Orientation Alignment Process.


Re-calibrate Guiding

  • Slew the telescope to theplanned target (by name, Sky Atlas, Hand Controller,...)
  • Re-calibrate the guiding if the telescope has been moved or different equipment has been used.  


Start Session Setup

Continue with the next steps like 

*) The ASIAIR PRO password cannot be changed with the app, but I found a hack on the Internet that explains how to "personalize" the password on your own ASIAIR PRO

Check out other ASI AIR Pro workflow descriptions:

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