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Welcome to the
Open PHD Guiding
(PHD2) forum, telescope guiding software for astro-photographers.
To get help with PHD2, please upload your log files - here's how:
How to ask for help with PHD2
.
If you are new to PHD2, we urge you to read the
documentation
and
follow these tips:
Use the forum search tools - most questions have been answered many times
Read and follow the
Best Practices Guide
Use the New-Profile-Wizard to define and manage your equipment configurations
Avoid making changes to guiding parameters without knowing exactly what they do
After you get a good calibration run and a Guiding Assistant Run, per the Best Practices, run the
Baseline Assessment
Forum guidelines for vendors
.
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Morten B Kristensen
, …
pollya...@gmail.com
9
3:51 AM
How to install PHD2 on Ubuntu 20.04 LTS
Hi again, Well, I downloaded the iso "Ubuntu MATE 24.04.3 LTS" from https://ubuntu-mate.org
unread,
How to install PHD2 on Ubuntu 20.04 LTS
Hi again, Well, I downloaded the iso "Ubuntu MATE 24.04.3 LTS" from https://ubuntu-mate.org
3:51 AM
Ana Ta
, …
Brian Valente
16
Sep 16
Guiding for 10 micron mount
Hi Brian, I wanted to compare whether guiding will improve FWHM depending on exposure length. I will
unread,
Guiding for 10 micron mount
Hi Brian, I wanted to compare whether guiding will improve FWHM depending on exposure length. I will
Sep 16
jdh_astro
, …
Brian Valente
6
Sep 16
Star Streak Troubleshooting
Jonathan I hope you evaluated the results and made your own assessment? DIff Flexure is not a pass/
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Star Streak Troubleshooting
Jonathan I hope you evaluated the results and made your own assessment? DIff Flexure is not a pass/
Sep 16
Don Waters
, …
Bruce Waddington
4
Sep 16
ASI220 Mini Darks
Have you read the User Guide section about all of this? Judging from your questions, perhaps not...
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ASI220 Mini Darks
Have you read the User Guide section about all of this? Judging from your questions, perhaps not...
Sep 16
David Ridge
Sep 16
wondering about the wandering
I have been experiencing sub .70rms guiding fairly consistently but on occassion, my mount just
unread,
wondering about the wandering
I have been experiencing sub .70rms guiding fairly consistently but on occassion, my mount just
Sep 16
PartlyC
, …
Bruce Waddington
7
Sep 15
Memory limits?
That's all being looked into and it will probably come to pass when we think it makes sense.
unread,
Memory limits?
That's all being looked into and it will probably come to pass when we think it makes sense.
Sep 15
Alex Yas
,
Brian Valente
2
Sep 15
Choosing between two methods of guiding
Hi Alex, the short answer is it depends.Both approaches have benefits and drawbacks, some of which
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Choosing between two methods of guiding
Hi Alex, the short answer is it depends.Both approaches have benefits and drawbacks, some of which
Sep 15
Yahya Ahmed
, …
Bruce Waddington
16
Sep 15
Large regular spikes in guiding
I worked a little bit more on the cable management and the tightness of all the screws inside the
unread,
Large regular spikes in guiding
I worked a little bit more on the cable management and the tightness of all the screws inside the
Sep 15
Kenn Hopkins
, …
Brian Valente
10
Sep 14
Curious about how this is happening.
Hi Kenn >>>Has something changed from 2018 to 2025? based on your last logs, it appears yes
unread,
Curious about how this is happening.
Hi Kenn >>>Has something changed from 2018 to 2025? based on your last logs, it appears yes
Sep 14
George Hart
,
Bruce Waddington
3
Sep 12
Error creating new dark library at 4.5s exposure.
Thanks Bruce. On Thursday, September 11, 2025 at 11:34:47 AM UTC-4 bw_m...@earthlink.net wrote: This
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Error creating new dark library at 4.5s exposure.
Thanks Bruce. On Thursday, September 11, 2025 at 11:34:47 AM UTC-4 bw_m...@earthlink.net wrote: This
Sep 12
Don Waters
,
Brian Valente
2
Sep 12
https://openphdguiding.org/logs/dl/PHD2_logs_PU4m.zip
Hi Don I think we need some better data from you to provide reasonable feedback First, please update
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https://openphdguiding.org/logs/dl/PHD2_logs_PU4m.zip
Hi Don I think we need some better data from you to provide reasonable feedback First, please update
Sep 12
Lee
,
Brian Valente
5
Sep 11
Can't Figure Out Why I a Having Problems
Thanks for the update Lee >>> I think the biggest change was not doing a calibration near
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Can't Figure Out Why I a Having Problems
Thanks for the update Lee >>> I think the biggest change was not doing a calibration near
Sep 11
Günter Knerr
,
Brian Valente
5
Sep 10
Pixelated tracking star
sure happy to help Günter. Yes, the text is quite small and can be easily overlooked Brian On Wed,
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Pixelated tracking star
sure happy to help Günter. Yes, the text is quite small and can be easily overlooked Brian On Wed,
Sep 10
Chris Carlton
, …
Bruce Waddington
9
Sep 10
PhD2 fails to identify asi220 in ZWO2600mm duo
Well, turns out it was a rookie mistake and is now sorted out. I was trying to switch the connection
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PhD2 fails to identify asi220 in ZWO2600mm duo
Well, turns out it was a rookie mistake and is now sorted out. I was trying to switch the connection
Sep 10
Don Waters
Sep 9
DRIFT ALIGN ISSUES
I use a Celestron CGEM and 50mm guide scope with Orion Star shoot. I get good polar alignment with
unread,
DRIFT ALIGN ISSUES
I use a Celestron CGEM and 50mm guide scope with Orion Star shoot. I get good polar alignment with
Sep 9
Eric Giraud
,
Bruce Waddington
4
Sep 8
Guiding stopped working for no apparent reason
Glad you found it. It's pretty important to have a systematic cable routing system because
unread,
Guiding stopped working for no apparent reason
Glad you found it. It's pretty important to have a systematic cable routing system because
Sep 8
Ed Chavez
, …
Brian Valente
13
Sep 7
Profile was lost
The horizon was more to get a screen shot to see what your open sky looked like Brian Brian Valente
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Profile was lost
The horizon was more to get a screen shot to see what your open sky looked like Brian Brian Valente
Sep 7
Chris Gittins
, …
Bruce Waddington
10
Sep 7
GEM45 issue
Hi Bruce, Thanks for your observations. Looking closer at the star-cross image and associated still,
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GEM45 issue
Hi Bruce, Thanks for your observations. Looking closer at the star-cross image and associated still,
Sep 7
Daniel
, …
Bruce Waddington
29
Sep 7
Ioptron CEM70EC
You're welcome, Dan. This one has been a puzzler and I don't think Brian or I can feel like
unread,
Ioptron CEM70EC
You're welcome, Dan. This one has been a puzzler and I don't think Brian or I can feel like
Sep 7
John Engstrom
, …
Dale Ghent
8
Sep 5
Is there an easy way to combine multiple guiding sections from the same guide log in PHD2 Log Viewer?
The root issue is an information display issue in a completely unrelated-to-NINA log-viewing app; an
unread,
Is there an easy way to combine multiple guiding sections from the same guide log in PHD2 Log Viewer?
The root issue is an information display issue in a completely unrelated-to-NINA log-viewing app; an
Sep 5
Don Waters
,
Brian Valente
2
Sep 4
PEC with CGEM
Don >>>It seems I should be able to replace manual guiding with PhD2 guiding, but when I try
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PEC with CGEM
Don >>>It seems I should be able to replace manual guiding with PhD2 guiding, but when I try
Sep 4
Aris Pope
,
Bruce Waddington
2
Sep 3
CEM60 Guiding
What I see in your 9/1 log file is many, many lost star events. I wonder if the problem is that you
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CEM60 Guiding
What I see in your 9/1 log file is many, many lost star events. I wonder if the problem is that you
Sep 3
Manuel Shaw
,
Bruce Waddington
3
Sep 2
guiding issues
Bruce, thanks for your assistance in my issues with guiding. Currently on night 2 of very very good
unread,
guiding issues
Bruce, thanks for your assistance in my issues with guiding. Currently on night 2 of very very good
Sep 2
Georg Albrecht
, …
Brian Valente
12
Sep 1
Jumps in guiding
Hi Brian, Thank you for your time. The imaging scale on this rig is 3.1"/pixel / RedCat51 >
unread,
Jumps in guiding
Hi Brian, Thank you for your time. The imaging scale on this rig is 3.1"/pixel / RedCat51 >
Sep 1
Manuel Shaw
,
Bruce Waddington
2
Sep 1
Post meridian flip
Based on your rather terse comment, I suspect we're not on the same page here. The point of my
unread,
Post meridian flip
Based on your rather terse comment, I suspect we're not on the same page here. The point of my
Sep 1
Manuel Shaw
Aug 30
Meridian flip
Experiencing issues to reimage after meridian flip. Imaged prior to for over 5 hours in guiding with
unread,
Meridian flip
Experiencing issues to reimage after meridian flip. Imaged prior to for over 5 hours in guiding with
Aug 30
Theodossis Papadopoulos
,
bw_m...@earthlink.net
2
Aug 29
ZWO ASI 715 MC does not show on dropdown to select it when selecting "ZWO ASI Camera"
Yes, the SDK update is already queued up for the next release. Bruce From: open-phd-guiding@
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ZWO ASI 715 MC does not show on dropdown to select it when selecting "ZWO ASI Camera"
Yes, the SDK update is already queued up for the next release. Bruce From: open-phd-guiding@
Aug 29
Domenico Cataldi
, …
Brian Valente
7
Aug 29
After the meridian flip I had the problem on an axis.
Perfect. Now everything's clear. Thank you for your time and patience. I'll try to update you
unread,
After the meridian flip I had the problem on an axis.
Perfect. Now everything's clear. Thank you for your time and patience. I'll try to update you
Aug 29
Miguel G
,
bw_m...@earthlink.net
6
Aug 29
How phd2 does compute rms?
great, thanks again El vie, 29 ago 2025 a las 17:19, <bw_m...@earthlink.net> escribió: Yes,
unread,
How phd2 does compute rms?
great, thanks again El vie, 29 ago 2025 a las 17:19, <bw_m...@earthlink.net> escribió: Yes,
Aug 29
pique...@gmail.com
, …
Brian Valente
6
Aug 26
Forcing recalibration
Thanks for the suggestions. Will give them a try and get back if I have trouble. On Monday, August 25
unread,
Forcing recalibration
Thanks for the suggestions. Will give them a try and get back if I have trouble. On Monday, August 25
Aug 26