Version 1 (modified by zachedwa, 15 months ago) ( diff )



Running a remote observatory has its own set of issues. If you notice any issues with TMO while operating please notify Jon and Zach via the email alias issues@… so that we can address it.

If there is an immediate issue that presents potential danger to the telescope, call Zach (TA's should have Zach's phone number).

Lat and Long

TMO is located at a latitude of 32°17'35" N (32.293048), a longitude of -106° 41'53" (-106.698056), and an altitude of 1505m (4937ft) MSL.


Prior to observations, check the weather -

Clear Dark Skies -

Weather Underground -

Please recall that you are using a remote observatory and are not physically present at the dome/telescope. And it takes a significant amount of time to get to the telescope. Please keep this in mind when checking the weather for the night. If, for example, the weather becomes unsafe and the dome refuses to close this could cause serious damage.

Connection Information

You can connect to TMO's computer via VNC Viewer - - Jon and Zach have have the password for this connection.

Some times the connection can be slow and there is not immediate feed back when you press a button. Only press a button once.

Please Note - VNC uses port 5900 to connect to a computer. If too many people are connected at once, this can cause the connection to run slowly. Make sure you disconnect when done for the night. And if someone else is using TMO please limit the number of connections to what is required. Zach will occasionally go through and kick lingering connections on port 5900 (during the day).

Start Up from an Empty Desktop

We usually keep the desktop set up, however there are times where the desktop might be blank. If you are starting observation from an empty desktop (please inform Zach E of this) and follow these steps:

  • Open FocusMax v4 using the desktop icon
  • Open up MaximDL
  • In MaximDL - click the Observatory Toggle Control (the icon is a little observatory) and click to connect all
  • Open up ACP using the desktop icon.
  • If doing manual observations - in ACP go to both Telescope and Camera to connect both the telescope and camera

Dome Control

The Dome Control is done via ACP (note, NOT ASCOM Dome Control). In the ACP control box - in the bottom left click the botton - Dome Control to access the controls. Once you open the dome - it will open the dome slit and then slew to the telescope.


There are several scripts (for example, auto focus) which can be very useful. These are located in the ACP box in the top right - click on select the script... and it'll open a list of scripts that you can run.

Useful Scripts:

Potential Problems

Windows Log-In Screen -Jon and Zach always aim to keep TMO's desktop logged in. If, when you connect via VNC, you notice that its asking for the windows log-in. Please notify Jon and Zach. This indicates the computer has restarted and Zach will need to investigate "why". Ask Jon or Zach and they will log in.

Bad Telescope Connection - This usually happens after the telescope has been sitting for a while without use. If the telescope has a bad connection - you might have to disconnect the telescope in ACP (and possibly MaximDL) and reconnect them. If this doesn't work, you can disconnect everything, then exit out of all the desktop programs then start them back up using the instructions above for starting from an empty desktop.

Dome Stops Following to Scope - this usually happens if you are manually operating the telescope and you start controlling the dome separately. Set it to park, then once it stops - you'll be able to set it to home which will move it back to the front of the scope.

Trailed Images - Possible that images become trailed if the autoguider isn't configured. See below for calibration. This can also happen if conditions are poor.

Camera Connected but exposure fail - If the camera is connected but fails at exposing, you might need to power cycle the camera using tmopower2. It is also possible that FocusMax v4 and MaximDL aren't talking correctly - restarting other applications and reconnecting will fix this.

Slew to an Object

Slewing can be accomplished through the ACP program, which provides a deep sky catalog and various bright stars, or through the Scitech telescope controller. The "Nudge" window in ACP allows you to offset the telescope in any direction.

To go to an object - in the bottom left of the ACP box, click Slew or Sync (catalog). This will bring up an option to allow you to slew the scope to a given object. There are four options:

  • Coordinates (RA and Dec)
  • Deep Sky Object (picky about spacing in Messier and NGC catalog M 44)
  • Major Planet
  • Alignment Star.

Calibration of AutoGuider

The auto-guider is calibrated using MaximDL.

Closing Up for the Night

Make sure that both the dome and the telescope are parked. In the Dome Control window you can simply click "park" and it will tell the dome to go it's resting position. In the telescope control box, click "park" and it will do the same for the telescope.

Please visually ensure that both the dome and telescope are parked using the IPCam Client: (Must be used with a window computer, usually Jon and Zach keep a browser opened with the camera. If it asks you for the password, Jon and Zach can provide it).

Image Download

Every two hours the data from TMO is transferred to the astronomy server and can be accessed via the web at

TIP - You might want to note what time you do the observations to make finding your .fits file easier. When taken and transferred the images are automatically named "" which is usually not helpful.

Note: See TracWiki for help on using the wiki.