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Plate solving and goto with AstroTortilla

RogerTheDodger

By RogerTheDodger
in Discussions - Software

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Photosbykev

Photosbykev

Posted
Posted

anyone care to try to solve this image, OR, should I expect AT to fail because of the foreground?

The full frame image, converted from the Raw file to JPG is here http://www.photosbyk...IMG_0515_AT.jpg

Camera was a 5D MkII with Canon 24mm lens, horizontal field is 73.7 degrees. If it does solve I'd appreciate the settings as it fails after 480 seconds on my setup

IMG_0515_AT_1000.jpg

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dark star

dark star

Posted
Posted

I attache the log of my second attemtp to solve my Blue Snowball image, so far it has taken around 15 minutes, with no sign of solving it! The first time I tried solve-field -u app -L1/ -H2/ apod15.jpg in the Cygwin window, to set the minimum and maximum scales, but it didn't seem to make any difference.

David

solve-field apod15.jpg

Reading input file 1 of 1: "apod15.jpg"...

jpegtopnm: WRITING PPM FILE

Read file stdin: 3504 x 2336 pixels x 1 color(s); maxval 255

Using 8-bit output

Extracting sources...

simplexy: found 6364 sources.

Solving...

Reading file "./apod15.axy"...

Field 1 did not solve (index index-209.fits, field objects 1-10).

Field 1 did not solve (index index-208.fits, field objects 1-10).

Field 1 did not solve (index index-207.fits, field objects 1-10).

Field 1 did not solve (index index-206.fits, field objects 1-10).

Field 1 did not solve (index index-205.fits, field objects 1-10).

Field 1 did not solve (index index-204-05.fits, field objects 1-10).

Field 1 did not solve (index index-209.fits, field objects 11-20).

Field 1 did not solve (index index-208.fits, field objects 11-20).

Field 1 did not solve (index index-207.fits, field objects 11-20).

Field 1 did not solve (index index-206.fits, field objects 11-20).

Field 1 did not solve (index index-205.fits, field objects 11-20).

Field 1 did not solve (index index-204-05.fits, field objects 11-20).

Field 1 did not solve (index index-209.fits, field objects 21-30).

Field 1 did not solve (index index-208.fits, field objects 21-30).

Field 1 did not solve (index index-207.fits, field objects 21-30).

Field 1 did not solve (index index-206.fits, field objects 21-30).

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dark star

dark star

Posted
Posted

Success! Obviously it is essential to get the sigma value correct, which must be something to do with the amount of noise in the image.

Hopefully I will soon try it out under the stars!

David

solve-field --sigma=100 -L 1 -H 2 apod15.jpg

Reading input file 1 of 1: "apod15.jpg"...

jpegtopnm: WRITING PPM FILE

Read file stdin: 3504 x 2336 pixels x 1 color(s); maxval 255

Using 8-bit output

Extracting sources...

simplexy: found 18 sources.

Solving...

Reading file "./apod15.axy"...

Field 1 did not solve (index index-209.fits, field objects 1-10).

log-odds ratio 120.639 (2.46969e+52), 14 match, 0 conflict, 0 distractors, 23 index.

RA,Dec = (351.798,42.8735), pixel scale 1.1075 arcsec/pix.

Hit/miss: ++++++++++++++(best)++++

Field 1: solved with index index-208.fits.

Field 1 solved: writing to file ./apod15.solved to indicate this.

Field: apod15.jpg

Field center: (RA,Dec) = (351.8, 42.87) deg.

Field center: (RA H:M:S, Dec D:M:S) = (23:27:11.676, +42:52:23.493).

Field size: 64.7487 x 43.1917 arcminutes

Creating new FITS file "./apod15.new"...

Creating index object overlay plot...

Creating annotation plot...

Your field contains:

NGC 7662 / Blue Snowball

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Sp@ce_d

Sp@ce_d

Posted
Posted

I use --sigma 100 with the notebook and 5 sec exposures as it's a bit limited with cpu time. With the canon dslr I reckon you can get away with only searching index 208 for getting the alignments & scope on target sorted.

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dark star

dark star

Posted
Posted

I found that --sigma30 seems to work best for me, at least for JPEG images. I tried Astrotortilla out under the stars, it didn't solve a 5 second exposure of M31 at --sigma100, but I changed it to --sigma30 inside and it solved fine. I changed the search radius to 45, I assume this will help?

I got the Astrotortilla window to work at last by changing the Cygwin Shell path to the correct one!

David

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themos

themos

Posted
Posted

In cygwin terminal, do

ls /usr/local/astrometry/bin/solve-field.exe

If you see "/usr/local/astrometry/bin/solve-field.exe" then that's where the program has been installed and you need to do this

$ echo "PATH=/usr/local/astrometry/bin:\$PATH" >> ~/.bashrc

Then try AT again and you won't get the "command not found" error (hopefully)

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Earl

Earl

Posted
Posted

In cygwin terminal, do

ls /usr/local/astrometry/bin/solve-field.exe

If you see "/usr/local/astrometry/bin/solve-field.exe" then that's where the program has been installed and you need to do this

$ echo "PATH=/usr/local/astrometry/bin:\$PATH" >> ~/.bashrc

Then try AT again and you won't get the "command not found" error (hopefully)

Both AstroTortilla and Cygwin are install on the route of my C drive

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