AstroBin

AstroBin

AstroBin

Astrobin/Pixinsight annotation does not find my object AstroBin Platform open discussions community forum · Willem Jan Drijfhout · ... · 6 · 117 · 0

Wjdrijfhout 6.78
Willem Jan Drijfhout
...
· 
·  Share link
When I plate-solved and annotated my most recent image of IC4955 and IC4954 in pixinsight, it only found IC4954. And it drew a circle around it well outside the boundaries of the whole image, so not at all relevant to the actual object. Today I uploaded this image to Astrobin. On AB plate solving happens in two stages. First an initial plate-solve, followed by 'advanced' plate solve. When the first plate-solve had happened, it recognised correctly both objects, but when the advanced plate solve had finished, it only recognised one object. 
The advanced plate solve on Astrobin uses PixInsight, so not surprised that it gives the same result as my own plate solve. 

So my questions are:

- How can astrobin/pixinsight miss an obvious object? One would think that the Vizier database would contain at least the whole IC catalogue?
- Is there a way to force Pixinsight to use other/better databases, so that the annotation works as anticipated?
- What plate solving/annotation engine is used by Astrobin for the first run and why is that not the 'final' annotation?
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
jonnybravo0311 8.79
Jonny Bravo
...
· 
·  1 like
·  Share link
Very interesting. Searching here on AB, I can find a number of images where both IC4954 and IC 4955 are annotated. I also find a good number where only IC4954 shows up in the annotation. I downloaded your image and ran it through the image solver and annotation scripts in PI and have so far been unable to make it actually display IC4955, even though it is clearly there. I tried using the "What's in my Image" script by Seti Astro, and it successfully identifies and annotates both IC catalog entries.

Hopefully someone will be able to solve the mystery!
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
shirejedi 6.64
Brian Poole
...
· 
·  1 like
·  Share link
Good question.  As you mentioned, the "original version" of the annotation (example) seems to identify both more accurately whereas PI identifies IC4954 as a larger area of the sky including IC4955.

If you look at the CSV file that I believe the AnnotateImage script uses (e.g., C:\Program Files\PixInsight\src\scripts\AdP\NGC-IC.csv), it appears to have IC4954 (not a surprise), but it does not have an entry for IC4955.  The diameter value for IC4954 also appears to be bigger than it should be which explains the relatively large circle around IC4954 once annotated.  I'm also wondering where this data comes from and why it's incomplete/inaccurate.  I suppose you could add the entry yourself and then upload a revision with that appearing on hover but that doesn't address the underlying issue and obviously won't affect the process Astrobin uses to annotate images.
Edited ...
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
shirejedi 6.64
Brian Poole
...
· 
·  1 like
·  Share link
One more bit of detail: it looks like the data might come from Sky Catalogue 2000.0.  If you have the 1985 version of the book handy, look at page 300 of volume 2.  They have IC4954 and IC4955 listed together as IC4954-5.  If you look at the VizieR catalog entries in VII/118 (IC4954, IC4955) it appears that they're listed separately and I think the source there might the 1988 version of NGC 2000.0.

This might be a good question to ask over in the PixInsight forum.  I'm sure they could give more definitive answers for most of your questions if not all.  I'm intrigued though!
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
Wjdrijfhout 6.78
Willem Jan Drijfhout
Topic starter
...
· 
·  1 like
·  Share link
Thanks Brian, I did not know that these data could be directly accessed in the csv file. I'll try and see if I can change it there. That might solve the problem on my PC, still not on Astrobin. So like you say, I will also post this on the PixInsight forum and see if they can add some insights to it.
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
Wjdrijfhout 6.78
Willem Jan Drijfhout
Topic starter
...
· 
·  Share link
Just posted on PixInsight forum as well.
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
siovene
Salvatore Iovene
...
· 
·  1 like
·  Share link
Hey @Willem Jan Drijfhout,

my account doesn't have enough privileges to reply to that post on the PI forums. I see that Juan mentioned he'll fix it. Please remind him to send me a copy of the fix so I can deploy on the AstroBin network :-)

Thanks!

EDIT: nevermind, I needed to confirm my email to post there, it's done!
Edited ...
Like
×

Sorry :-(

Editing a post is only allowed within 24 hours after creating it.
×

Share this forum post

Copy the URL below to share a direct link to this post.

Close
×

Post editing not available

This post cannot be edited using the classic forums editor.

To edit this post, please enable the "New forums experience" in your settings.

Go to Settings Close
 
Register or login to create to post a reply.
×

Warning!

This operation will reload the current page. If you have any unsaved information in a form, it will be lost.

You can also dismiss this window, and your operation will be applied at the next page navigation.