As guiding proceeds, some of the secondary stars may be rejected because they are too dim or have drifted outside the field of view. This is of no concern, the algorithm handles the secondary list automatically. When multi-star guiding is active, the PHD2 image display will show the usual rectangle ...

It can be used in situations where ... the dark library, or slightly increasing the exposure times. 'Use multiple stars' - determines whether PHD2 will use more than one star for guiding....

March 28, 2021 - Bonjour les copains, Dans la dernière version béta du 2/12, phd2 annonce cette nouveauté, le guidage sur plusieurs étoiles en même temps! http://openphdguiding.org/development-snapshots/ ça m'a l'air une bonne idée! ici le doc : ...

If the stars aren’t focused properly, you will have problems getting a good guiding calibration and subsequently any good guiding. Use the Multi-star guiding feature found in the Guiding tab. All you need to do is check the box as shown in the tab.

March 15, 2022 - This situation is handled and any dithering activity will avoid driving the primary star out of the field of view. This machinery was already in place for single-star guiding. Lastly, recently I encountered a funny situation. Please see the attached · image. You can see that PHD2 picks the diffraction spots of the bright

December 6, 2020 - I just learned about Multi-Star autoguiding with PHD2. Should I enable PHD2 multi-star autoguiding or should I wait for Voyager to update their software to handle Multi-Star autoguiding with PHD2? Thanks, Peter

January 15, 2021 - If it's anything like as good as EKOS' own internal multistar implementation, phd2 users are in for a treat.

Part 1 is an introduction to multistar guiding, where key concepts are explained. I also provide a link to a program I wrote as a companion app for PHD2 Guiding. It uses the PHD2 Server and the PHD2 Debug logs to provide a real-time display of many of the parameters involved. My app also provides real-time performance graphs so you can learn more about this algorithm and even make comparisons between single-star ...

March 15, 2022 - I have posted about this before, but since then, new and improved versions of PHD2 have been released. I am currently using 2.6.9 dev 4. I have watched the following behavior enough to be convinced that it is not a fluke. First, let me set the context. ... 3) Because of 1) I never select the guide star, nor do I invoke Auto-Select. The guiding is invoked by the PHD Broker. ... What I see is that as soon as guiding is begun, a primary star is selected and multiple secondary stars are selected.

Is anyone currently working on multi-star guiding? If so, I'd like to help. If not, I figured I'd give it a shot. - Shane ... Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message ... As far as I know, nobody is working on it. You are welcome to give it a go. Instructions for building phd2 on Windows, Mac, and Linux are on the open-phd-guiding google code wiki.

June 13, 2022 - Has anyone else had this issue and found a solution? When multi star guiding works, it definitely improves my total RMS error, and just as importantly leads to fewer lost guide stars and runaway drift. However it seems to use multiple stars less than 50% of the time.

September 22, 2025 - The logic behind multi-star guiding is that the quality of your guiding will improve if the information from multiple stars is combined. ... When the user clicks the Auto-select Star button, Open PHD2 will use the current exposure from your ...

December 8, 2020 - Just reading on Cloudynights (www.cloudynights.com/topic/743080-phd2-a...-star-guiding/page-4) about PHD2 multi-star guiding. Looks promissing :-)...

December 9, 2025 - manually choose a guide star, but they won't then be able to use multi-star guiding. For people who question the auto- selection process, the debug log file contains a detailed list, for every auto-find, of the location and properties of · every candidate object in the guide frame and how these were included or excluded to compile the final list of usable guide ... 1. The angular orientation of the camera sensor relative to the right ascension and declination axes of the mount and the ... PHD2 handles these measurements automatically by sending guide pulses to the mount and watching how far and in which

The auto-select function will nearly ... invoke multi-star guiding. In many cases, a star you choose interactively is at or near saturation and will produce sub-par results. You can use the Star Profile tool to examine the properties of the primary (brightest) selected star, however it was chosen. To get the best results from Auto-Select, you should use either a bad-pixel map or dark library and specify a Min-HFD value (Advanced Settings/Guiding tab) to reduce the likelihood of PHD2 mistakenly ...

April 5, 2021 - It allows PHD to average data from multiple stars in the frame in order to get a more consistent picture of where the scope is pointed relative to the sky. He said it made a small...

event server API: add star info to the LoopingExposures event ... PHD2 now produces a single debug log and guide log per night rather than a set each time the app is launched