Ngc 891 (C23)

KonFuz

16634

Deep Sky

Sep 17th, 2023

2268

NGC 891

Resolution:: 2020x1221 px
File size:: 818 KB

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Photo description / processing

A work in progress. I was supposed to shoot for about 6 hours total, but had to pack up early due to fog. Therefore, the object is most likely NGC 2146.

Technical information

Telescope/Lens: Sky-Watcher 2001
Camera: ZWO ASI178MC
Mount: HEQ5 Pro
Software: DeepSkyStacker, Siril, Pixinsight

Location: Мос. Обл, Россия

Light pollution

Yellow, Bortle 5 zone

Date taken: Sep 16th, 2023

Exposure

1450 × 6″ · ISO/Gain: 230 · Sep 16th, 2023

Total exposure: 2 h 25 m

Comments

Alex Ch

Excellent result! How long did DSS take to stack the images?

Sep 18th, 2023

KonFuzReply to Alex Ch

Thank you, registration 18 minutes, stack 25.

Sep 18th, 2023

AnthReply to KonFuz

I stacked 15 hours of PI frames.

Sep 19th, 2023

yas

Excellent! How and with what did you record the original frames? What guided your choice of exposure time and gain?

Sep 20th, 2023

Alex ChReply to yas

I support the question, I'm also curious! Really liked the photo!

Sep 20th, 2023

KonFuzReply to yas

Good day, I didn't see the comment. The shooting was done in ASI Studio, the weather was excellent at 7°C, the matrix was 9-10. I set the gain randomly; I don't set it between 0-100 because DSS doesn't accept frames and doesn't detect stars. The exposure time is like this due to the thick atmosphere; stars in the stack bloated to the size of soccer balls, plus micro-tracking errors at long exposures ruin the details.

Sep 21st, 2023