Is it possible for a picture to have too many stars?

Charles Jasper

unread,

Dec 27, 2021, 11:31:02 AM12/27/21

to astrometry

I have a picture from the Alabama Hills (east of Mount Whitney, CA) and it was damn near perfect dark skies. I've uploaded it two or three times and it's failed each time. I know in the bottom left is Orion. I'm trying to figure out so much more, from planets to galaxies to other stars and constellations. My Astronomy 100 course is from like, 20 years ago. Did I even take that? I took Rocks for Jocks...

Dustin Lang

unread,

Dec 27, 2021, 11:34:26 AM12/27/21

to Charles Jasper, astrometry

I would suggest setting the "Very wide field" setting. Also check whether the source detection is working -- are the brightest stars circled correctly?

Nice shot!!

cheers,

--dustin

On Mon, Dec 27, 2021 at 11:31 AM Charles Jasper <charles....@gmail.com> wrote:

I have a picture from the Alabama Hills (east of Mount Whitney, CA) and it was damn near perfect dark skies. I've uploaded it two or three times and it's failed each time. I know in the bottom left is Orion. I'm trying to figure out so much more, from planets to galaxies to other stars and constellations. My Astronomy 100 course is from like, 20 years ago. Did I even take that? I took Rocks for Jocks...

--
You received this message because you are subscribed to the Google Groups "astrometry" group.
To unsubscribe from this group and stop receiving emails from it, send an email to astrometry+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/65840b44-6063-439e-87a9-980ec5140a83n%40googlegroups.com.

Charles Jasper

unread,

Dec 27, 2021, 11:39:36 AM12/27/21

to astrometry

Yes, they are circled correctly! Thanks for the tip, I'm using very wide field and SExtractor and...something else, forgot what it was.

Charles Jasper

unread,

Dec 27, 2021, 11:41:52 AM12/27/21

to astrometry

Dang it, failed again.

Dustin Lang

unread,

Dec 27, 2021, 1:03:08 PM12/27/21

to Charles Jasper, astrometry

We do often have trouble with very wide fields. One thing you can try is cropping out a section from the center of the image (where the distortion will be smaller).

To view this discussion on the web visit https://groups.google.com/d/msgid/astrometry/ab6c368c-653d-44f3-aba7-0f4935235054n%40googlegroups.com.

Reply all

Reply to author

Forward