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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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Kenn Hopkins
, …
Bruce Waddington
12
5:34 PM
Curious about how this is happening.
I don't know what your image scale is on the main scope but my first reaction is that you shouldn
unread,
Curious about how this is happening.
I don't know what your image scale is on the main scope but my first reaction is that you shouldn
5:34 PM
Chris Gittins
, …
Bruce Waddington
12
5:19 PM
GEM45 issue
Glad it got sorted out. The "cross-talk" response when the Dec direction was reversed was
unread,
GEM45 issue
Glad it got sorted out. The "cross-talk" response when the Dec direction was reversed was
5:19 PM
David Ridge
,
Bruce Waddington
3
Sep 19
wondering about the wandering
This is the response from David, it was sent to my private e-mail by mistake: Here's 9+ hours of
unread,
wondering about the wandering
This is the response from David, it was sent to my private e-mail by mistake: Here's 9+ hours of
Sep 19
jdh_astro
, …
Bruce Waddington
7
Sep 19
Star Streak Troubleshooting
Jonathan - I'm afraid you missed the point of the exercise. If the intent is to measure unwanted
unread,
Star Streak Troubleshooting
Jonathan - I'm afraid you missed the point of the exercise. If the intent is to measure unwanted
Sep 19
BendGrampie
, …
Brian Valente
8
Sep 19
PHD2 shutting down for unknown reason..
Marc Is it possible there's an instruction of shutdown phd in your sequence that's getting
unread,
PHD2 shutting down for unknown reason..
Marc Is it possible there's an instruction of shutdown phd in your sequence that's getting
Sep 19
Paul Wilson
, …
Bruce Waddington
4
Sep 18
sub par calibration
This looks like a mess. The profile name is the same between 8/21 and 9/16 - probably the same
unread,
sub par calibration
This looks like a mess. The profile name is the same between 8/21 and 9/16 - probably the same
Sep 18
Ana Ta
, …
Brian Valente
26
Sep 18
Guiding for 10 micron mount
Ok. Fingers crossed then! Thanks On Thu, Sep 18, 2025 at 1:34 PM Brian Valente <bval...@gmail.com
unread,
Guiding for 10 micron mount
Ok. Fingers crossed then! Thanks On Thu, Sep 18, 2025 at 1:34 PM Brian Valente <bval...@gmail.com
Sep 18
Paul Wilson
,
Brian Valente
2
Sep 18
calibration
Paul I am not sure your equipment setup is correct. your calibration shows three steps in each
unread,
calibration
Paul I am not sure your equipment setup is correct. your calibration shows three steps in each
Sep 18
Morten B Kristensen
, …
pollya...@gmail.com
10
Sep 18
How to install PHD2 on Ubuntu 20.04 LTS
Hi! Success! I managed to get Ubuntu 22.04 LTS on the eee-pc, and then it was easy to install PHD2 as
unread,
How to install PHD2 on Ubuntu 20.04 LTS
Hi! Success! I managed to get Ubuntu 22.04 LTS on the eee-pc, and then it was easy to install PHD2 as
Sep 18
Don Waters
, …
Bruce Waddington
5
Sep 17
ASI220 Mini Darks
I am pleased to say that the new camera works great with PhD2 tonight. It has none of the behaviors I
unread,
ASI220 Mini Darks
I am pleased to say that the new camera works great with PhD2 tonight. It has none of the behaviors I
Sep 17
Don Waters
Sep 17
DRIFT ALIGN with CGEM
After several exasperating sessions trying to fine-tune drift alignment (after a good polar alignment
unread,
DRIFT ALIGN with CGEM
After several exasperating sessions trying to fine-tune drift alignment (after a good polar alignment
Sep 17
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
unread,
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
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
unread,
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
unread,
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
unread,
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,
unread,
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
unread,
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
unread,
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
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
unread,
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
unread,
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