Siril outputs a result.fit where it deleted ALL THE STARS.

Software Siril
1

For the last few days I’ve been really struggling with Siril. I’m having a hard time getting anything usable out of Siril.

One the one hand and not really my main issue, it’s really very slow. (Sequator processes the same data in 2 hours, while Siril does it in 5 hours.)

I could very well live with that if it could actually give any workable results. I’ve tried v0.99.4 to process my data (270lights, 50 flats, 50 darks, 50 biases) using the OSC_Preprocessing script but it eventually fails.

Using 0.9.12 and the DSLR_Reprocessing script I get this image where all the stars have vanished.

Screenshot from 2020-09-11 07-35-05
Screenshot from 2020-09-11 07-35-051920×1080 1.15 MB

I am at a complete loss. What is going on?

2

What did you do? If you did align then as you did it on landscape (no alignment on stars here) then it is normal. Stars are rejected during stacking process.
About the time of stacking. 0.99.4 is faster (really). Siril is slower that sequator because computation done are really more important and complex too.

3

I did nothing manual because I don’t understand most of it. I just ran the script DSLR_Reprocessing.

4

Which is not really done for landscape images.
So this is normal

5

So only for DSOs?

Is Siril, then, not the tool to use for landscape astrophotography?

6

Yes you can but not with these scripts. You need to make a selection in the sky. To align only on the stars first.
Siril scripts are just a tiny part of what siril can do. A really tiny.

7

It’s the only part I am able to use. The manual operations are much much too complicated for me.

Any recommendations where I can read up or watch any guides related to landscape stacking?

8

Yes, quick search on this website and you find: Processing a nightscape in Siril: a tutorial

1 Like
9

Thank you!

10

One last question, if you please.

Do 280 lights make sens for a landscape stack? Because I have a feeling it’s a bit overkill.

I mean after some testing with Sequator I didn’t notice much of a difference between stacking 30 and 280 lights.

11

OK, I followed this guide to the letter and at when stacking the debayered preprocessed lights Siril will still remove all my stars.

12

This is because you star alignement fail. What’s the result of this alignment in the console.

13 
09:28:31: Registration finished.
09:28:31: 12 images processed.
09:28:31: Total: 0 failed, 12 registered.
09:28:38: Reading FITS: file r_db_pp_lights_00010.fit, 3 layer(s), 6024x4024 pixels
09:28:38: Sequence loaded: r_db_pp_lights_ (1->12)
09:28:38: Closing sequence db_pp_lights_
09:29:20: Stacking will use registration data of layer 1 if some exist.
09:29:20: Stacking: processing...
09:29:20: Processing all images in the sequence (12)
09:29:20: Stacking result will be stored as a 32-bit image
09:29:20: Computing normalization...
09:29:20: With the current memory and thread (4) limits, up to 4 thread(s) can be used for sequence normalization
09:29:20: Reading FITS: file r_db_pp_lights_00010.fit, 3 layer(s), 6024x4024 pixels
09:29:23: Reading FITS: file r_db_pp_lights_00009.fit, 3 layer(s), 6024x4024 pixels
09:29:28: Reading FITS: file r_db_pp_lights_00011.fit, 3 layer(s), 6024x4024 pixels
09:29:32: Reading FITS: file r_db_pp_lights_00012.fit, 3 layer(s), 6024x4024 pixels
09:29:53: Reading FITS: file r_db_pp_lights_00001.fit, 3 layer(s), 6024x4024 pixels
09:29:54: Reading FITS: file r_db_pp_lights_00007.fit, 3 layer(s), 6024x4024 pixels
09:29:55: Reading FITS: file r_db_pp_lights_00004.fit, 3 layer(s), 6024x4024 pixels
09:29:59: Reading FITS: file r_db_pp_lights_00008.fit, 3 layer(s), 6024x4024 pixels
09:29:59: Reading FITS: file r_db_pp_lights_00005.fit, 3 layer(s), 6024x4024 pixels
09:30:03: Reading FITS: file r_db_pp_lights_00002.fit, 3 layer(s), 6024x4024 pixels
09:30:05: Reading FITS: file r_db_pp_lights_00006.fit, 3 layer(s), 6024x4024 pixels
09:30:07: Reading FITS: file r_db_pp_lights_00003.fit, 3 layer(s), 6024x4024 pixels
09:30:11: Using 9476 MB memory maximum for stacking
09:30:12: We have 12 parallel blocks of size 1006 (+0) for stacking.
09:30:12: Starting stacking...
09:30:26: Pixel rejection in channel #0: 0.088% - 1.220%
09:30:26: Pixel rejection in channel #1: 0.109% - 1.254%
09:30:26: Pixel rejection in channel #2: 0.100% - 1.173%
09:30:26: Rejection stacking complete. 12 images have been stacked.
09:30:26: Integration of 12 images:
09:30:26: Pixel combination ......... average
09:30:26: Normalization ............. additive + scaling
09:30:26: Pixel rejection ........... Winsorized sigma clipping
09:30:26: Rejection parameters ...... low=4.000 high=3.000
09:30:26: Saving FITS: file r_db_pp_lights_stacked.fit, 3 layer(s), 6024x4024 pixels
09:30:26: Background noise value (channel: #0): 21.732 (3.316e-04)
09:30:26: Background noise value (channel: #1): 24.863 (3.794e-04)
09:30:26: Background noise value (channel: #2): 22.645 (3.455e-04)
09:30:27: Execution time: 1 min 07 s.

Screenshot from 2020-09-12 09-31-27

14

I said alignment, and your log started just after alignment. Because we clearly see there are no alignment.

15

Sorry, I though it was enough.

Here it is.

09:25:45: Registration: processing using method: Global Star Alignment (deep-sky)
09:25:45: Reading FITS: file db_pp_lights_00001.fit, 3 layer(s), 6024x4024 pixels
09:25:45: Reference Image:
09:25:45: Findstar: processing...
09:25:58: Found 4735 stars in reference, channel #1
09:25:58: Reference Image: Limiting to 2000 brightest stars
09:25:58: FWHMx:        8.34 px
09:25:58: FWHMy:        6.00 px
09:25:58: Global star registration: processing...
09:25:59: Reading FITS: file db_pp_lights_00004.fit, 3 layer(s), 6024x4024 pixels
09:25:59: Findstar: processing...
09:25:59: Reading FITS: file db_pp_lights_00001.fit, 3 layer(s), 6024x4024 pixels
09:25:59: Reading FITS: file db_pp_lights_00010.fit, 3 layer(s), 6024x4024 pixels
09:25:59: Findstar: processing...
09:25:59: Reading FITS: file db_pp_lights_00007.fit, 3 layer(s), 6024x4024 pixels
09:25:59: Findstar: processing...
09:25:59: Saving FITS: file r_db_pp_lights_00001.fit, 3 layer(s), 6024x4024 pixels
09:26:09: Reading FITS: file db_pp_lights_00002.fit, 3 layer(s), 6024x4024 pixels
09:26:09: Findstar: processing...
09:26:12: Found 4427 stars in image 10, channel #1
09:26:12: Target Image: Limiting to 2000 brightest stars
09:26:12: Found 4473 stars in image 4, channel #1
09:26:12: Target Image: Limiting to 2000 brightest stars
09:26:12: Matching stars in image 10: done
09:26:12: 697 pair matches.
09:26:12: Inliers:      0.772
09:26:12: scaleX:       1.001
09:26:12: scaleY:       1.001
09:26:12: scale:        1.001
09:26:12: rotation:   +0.078 deg
09:26:12: dx:          +4.38 px
09:26:12: dy:          +2.36 px
09:26:12: FWHMx:        7.73 px
09:26:12: FWHMy:        5.55 px
09:26:12: Matching stars in image 4: done
09:26:12: 750 pair matches.
09:26:12: Inliers:      0.837
09:26:12: scaleX:       1.000
09:26:12: scaleY:       0.999
09:26:12: scale:        1.000
09:26:12: rotation:   +0.019 deg
09:26:12: dx:          +1.18 px
09:26:12: dy:          -0.03 px
09:26:12: FWHMx:        7.88 px
09:26:12: FWHMy:        5.66 px
09:26:13: Found 4346 stars in image 7, channel #1
09:26:13: Target Image: Limiting to 2000 brightest stars
09:26:13: Matching stars in image 7: done
09:26:13: 720 pair matches.
09:26:13: Inliers:      0.747
09:26:13: scaleX:       1.007
09:26:13: scaleY:       1.014
09:26:13: scale:        1.011
09:26:13: rotation:   +0.116 deg
09:26:13: dx:          +6.92 px
09:26:13: dy:         +21.73 px
09:26:13: FWHMx:        7.91 px
09:26:13: FWHMy:        5.65 px
09:26:13: Saving FITS: file r_db_pp_lights_00004.fit, 3 layer(s), 6024x4024 pixels
09:26:14: Saving FITS: file r_db_pp_lights_00010.fit, 3 layer(s), 6024x4024 pixels
09:26:14: Saving FITS: file r_db_pp_lights_00007.fit, 3 layer(s), 6024x4024 pixels
09:26:23: Found 4642 stars in image 2, channel #1
09:26:23: Target Image: Limiting to 2000 brightest stars
09:26:23: Matching stars in image 2: done
09:26:23: 1153 pair matches.
09:26:23: Inliers:      0.912
09:26:23: scaleX:       1.000
09:26:23: scaleY:       1.000
09:26:23: scale:        1.000
09:26:23: rotation:   +0.092 deg
09:26:23: dx:          +4.81 px
09:26:23: dy:          +0.29 px
09:26:23: FWHMx:        8.37 px
09:26:23: FWHMy:        5.97 px
09:26:24: Saving FITS: file r_db_pp_lights_00002.fit, 3 layer(s), 6024x4024 pixels
09:27:11: Reading FITS: file db_pp_lights_00005.fit, 3 layer(s), 6024x4024 pixels
09:27:11: Findstar: processing...
09:27:14: Reading FITS: file db_pp_lights_00011.fit, 3 layer(s), 6024x4024 pixels
09:27:14: Findstar: processing...
09:27:15: Reading FITS: file db_pp_lights_00008.fit, 3 layer(s), 6024x4024 pixels
09:27:15: Findstar: processing...
09:27:17: Reading FITS: file db_pp_lights_00003.fit, 3 layer(s), 6024x4024 pixels
09:27:17: Findstar: processing...
09:27:24: Found 4429 stars in image 5, channel #1
09:27:24: Target Image: Limiting to 2000 brightest stars
09:27:24: Matching stars in image 5: done
09:27:24: 724 pair matches.
09:27:24: Inliers:      0.765
09:27:24: scaleX:       0.997
09:27:24: scaleY:       0.996
09:27:24: scale:        0.997
09:27:24: rotation:   -0.054 deg
09:27:24: dx:          -3.56 px
09:27:24: dy:          -7.92 px
09:27:24: FWHMx:        7.78 px
09:27:24: FWHMy:        5.54 px
09:27:25: Saving FITS: file r_db_pp_lights_00005.fit, 3 layer(s), 6024x4024 pixels
09:27:27: Found 4423 stars in image 11, channel #1
09:27:27: Target Image: Limiting to 2000 brightest stars
09:27:27: Matching stars in image 11: done
09:27:27: 695 pair matches.
09:27:27: Inliers:      0.876
09:27:27: scaleX:       0.999
09:27:27: scaleY:       0.998
09:27:27: scale:        0.998
09:27:27: rotation:   +0.018 deg
09:27:27: dx:          +0.65 px
09:27:27: dy:          -3.86 px
09:27:27: FWHMx:        7.81 px
09:27:27: FWHMy:        5.57 px
09:27:28: Saving FITS: file r_db_pp_lights_00011.fit, 3 layer(s), 6024x4024 pixels
09:27:29: Found 4373 stars in image 8, channel #1
09:27:29: Target Image: Limiting to 2000 brightest stars
09:27:29: Matching stars in image 8: done
09:27:29: 722 pair matches.
09:27:29: Inliers:      0.737
09:27:29: scaleX:       1.001
09:27:29: scaleY:       1.001
09:27:29: scale:        1.001
09:27:29: rotation:   +0.030 deg
09:27:29: dx:          +1.87 px
09:27:29: dy:          +0.93 px
09:27:29: FWHMx:        7.94 px
09:27:29: FWHMy:        5.72 px
09:27:29: Saving FITS: file r_db_pp_lights_00008.fit, 3 layer(s), 6024x4024 pixels
09:27:30: Found 4558 stars in image 3, channel #1
09:27:30: Target Image: Limiting to 2000 brightest stars
09:27:30: Matching stars in image 3: done
09:27:30: 749 pair matches.
09:27:30: Inliers:      0.854
09:27:30: scaleX:       0.999
09:27:30: scaleY:       0.998
09:27:30: scale:        0.998
09:27:30: rotation:   -0.019 deg
09:27:30: dx:          -1.09 px
09:27:30: dy:          -4.42 px
09:27:30: FWHMx:        7.81 px
09:27:30: FWHMy:        5.61 px
09:27:31: Saving FITS: file r_db_pp_lights_00003.fit, 3 layer(s), 6024x4024 pixels
09:27:45: Reading FITS: file db_pp_lights_00006.fit, 3 layer(s), 6024x4024 pixels
09:27:45: Findstar: processing...
09:27:57: Found 4375 stars in image 6, channel #1
09:27:57: Target Image: Limiting to 2000 brightest stars
09:27:57: Matching stars in image 6: done
09:27:57: 707 pair matches.
09:27:57: Inliers:      0.924
09:27:57: scaleX:       1.000
09:27:57: scaleY:       1.000
09:27:57: scale:        1.000
09:27:57: rotation:   -0.052 deg
09:27:57: dx:          -2.95 px
09:27:57: dy:          +0.89 px
09:27:57: FWHMx:        7.83 px
09:27:57: FWHMy:        5.59 px
09:27:57: Saving FITS: file r_db_pp_lights_00006.fit, 3 layer(s), 6024x4024 pixels
09:28:17: Reading FITS: file db_pp_lights_00012.fit, 3 layer(s), 6024x4024 pixels
09:28:17: Findstar: processing...
09:28:17: Reading FITS: file db_pp_lights_00009.fit, 3 layer(s), 6024x4024 pixels
09:28:17: Findstar: processing...
09:28:29: Found 4440 stars in image 12, channel #1
09:28:29: Target Image: Limiting to 2000 brightest stars
09:28:29: Matching stars in image 12: done
09:28:29: 701 pair matches.
09:28:29: Inliers:      0.820
09:28:29: scaleX:       1.001
09:28:29: scaleY:       1.002
09:28:29: scale:        1.001
09:28:29: rotation:   +0.014 deg
09:28:29: dx:          +0.46 px
09:28:29: dy:          +2.44 px
09:28:29: FWHMx:        7.87 px
09:28:29: FWHMy:        5.65 px
09:28:30: Saving FITS: file r_db_pp_lights_00012.fit, 3 layer(s), 6024x4024 pixels
09:28:30: Found 4385 stars in image 9, channel #1
09:28:30: Target Image: Limiting to 2000 brightest stars
09:28:30: Matching stars in image 9: done
09:28:30: 719 pair matches.
09:28:30: Inliers:      0.759
09:28:30: scaleX:       1.000
09:28:30: scaleY:       1.000
09:28:30: scale:        1.000
09:28:30: rotation:   +0.051 deg
09:28:30: dx:          +2.97 px
09:28:30: dy:          +0.36 px
09:28:30: FWHMx:        7.82 px
09:28:30: FWHMy:        5.56 px
09:28:31: Saving FITS: file r_db_pp_lights_00009.fit, 3 layer(s), 6024x4024 pixels
09:28:31: Sequence processing succeeded.
09:28:31: Execution time: 2 min 46 s.
09:28:31: Registration finished.
09:28:31: 12 images processed.
09:28:31: Total: 0 failed, 12 registered.
16

What if you stack with the sum stacking algorithm? I think you will see startrail?

17

Yes, that is correct.

Screenshot from 2020-09-12 09-53-03
Screenshot from 2020-09-12 09-53-031920×1080 983 KB

18

Did you make a sky area selection before alignment?

19

No, that part isn’t in the guide. How do I do that?

20

Just draw a selection, in the sky, and check the “Match stars in selection” button.