Voyager 2.3.2m with Stellarium

A little advice appreciated please!

Great to see that v 2.3.2m now has Stellarium functionality as well - been waiting eagerly for that! Excellent work as always Leo and much appreciated!

I have one issue - I’ve correctly set up ‘remote’ configuration within Stellarium (and re-started it, several times), also configured as required in Voyager setup (localhost, 8090, ‘try start exe on connect’). Doing a ‘connection test’ returns “Connection OK”; also Stellarium does load when connecting in Voyager start up. So, all would seem to be good at that point.

However, if I then select a target within Stellarium and then try a ‘fast find’ in ‘on the fly’ I get an error box pop up with: “[ERRORE] The remote server returned and error: (404) Not Found”.

Something I’ve done/not done? Any ideas Guys? I don’t have any equipment actually connected at this point, by the way.

Voyager is v.2.3.2m (obviously!) and Stellarium is v.0.20.3

Many thanks,


Hi Richard,

I cannot found the error you have reported like string in Voyager because its an error generated directly from Stellarium. This error is generated when you search an object that doesn’t exist on Stellarium databases. Look at example on my PC (sorry but my stellarium is in italian but error is the same).

Hope this help.

All the best

Ah! Interesting …

OK, many thanks Leo - I’ll follow up on that useful information in that case …

Kind regards,


Hi Leo,

Well, I found my error (big doh, what an idiot!!) - yes, things work better if the correct format for an object is entered into the ‘name’ field in the first place, don’t they!!!

Ahem … I’ll now go and hang my head in shame in a darkened room … Maybe I’m just a bit tired!

You could do the following:

  1. Click on a target in Stellarium
  2. Click on a small green icon in between Fast Find and Sesame buttons in OnTheFly window.
  3. Voyager Object Finder window pops up.
  4. Click on Get Selection button of Voyager Object Finder window.
  5. Click on Use button of Voyager Object Finder window.
  6. This should fill in Name and RA/Dec coordinates in OntheFly window.
  7. Go from there.


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If you want more info on how function the field ‘name’ and the target box please check here:

Hi Peter,

Many thanks - indeed that procedure works brilliantly, which was really what I was trying to replicate in the first place - i.e., being able to choose and select a target in Stellarium first and then transport the coordinates & details into Voyager …

Cheers, much appreciated,


I am still having trouble connecting to Stellarium. I have “remote control plugin” loading on startup with Stellarium using the default (8090) port.

In Voyager I’ve selected Stellarium as my planetarium with Hostname / IP =, Port = 8090, and Try Start EXE On Connect checked.

When I hit Connect on the Startup panel, Stellarium launches, but I get the following error:
Planetarium Connection Error = [ERROR CODE = ERRORE] : Unable to connect to the remote server

If I hit DISCONNECT and then CONNECT (Stellarium already running) it seems to connect fine.

Well, I am not sure the connection is fine. The connection test on the setup page returns “OK”, but the programs don’t seem to be communicating - if I click on a target in Stellarium, it doesn’t show up as my “OnTheFly” Target - shouldn’t it?

No you click on a target in stellaruium, then in Voyager click the screen icon next to fast find on the on the fly page.
From there you press the get selection button and it’ll paste the selected coordinates of the object from Stellaruium. You then press use and it’ll populate the target with the coordinates.
Sounds complicated but it’s easy.

Thanks. That works ! Any ideas on the Stellarium initially showing “unable to connect to remote server” on initial connection? It’s kind of a pain having to disconnect then reconnect to get this to go away.

No prob I had the exact same issue . You need to increase the start delay for Stellaruium.

Select the setup screen, then go to the Voyager tab. Under external process increase the time there.

I have mine set to 10 seconds and that fixed the issue for me. Stellaruium just takes a while to load.

Awesome! Ten seconds seems to work for me as well ! Thanks again!

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Or simply start Stellarium first and then Voyager.


I’m having the same problem. I have checked load remote control at startup in stellarium 0.21.1, (and made sure that the configuration is saved). I set the hostname in the stellarium panel to localhost and the port to 8090.
When I hit connection test I get the mentioned error. No access to server (translated from danish :-))

Check you process starting wait time in VOyager

All the best