M 13

praeger

461558

Deep Sky

Apr 19th, 2025

1477

NGC 6199NGC 6205NGC 6207IC 4617

Resolution:: 3700x1900 px
File size:: 4490 KB

Show astrometry on hover

Photo description / processing

Shot in late March (on Player One Uranus-C) and early April (on Touptek ATR585C)

Technical information

Telescope/Lens: Celestron RASA 8
Camera: Player One Uranus C
Mount: Sky-Watcher EQ6-R Pro
Guide Scope: ZWO 30mm f/4 Guide Scope
Guide Camera: ZWO ASI178MM
Software: DeepSkyStacker, GraXpert, FitStacker, Cosmic Clarity, NoiseXTerminator, StarXTerminator, Adobe Photoshop

Location: St. Petersburg, Russia

Light pollution

White, Bortle 8/9 zone

Date taken: Apr 18th, 2025

Exposure

90 × 120″ · ISO/Gain: 215 · Player One Uranus-C · Apr 18th, 2025
48 × 120″ · ISO/Gain: 1000 · Touptek ATR585C, HCG · Apr 18th, 2025

Total exposure: 4 h 36 m

Comments

ankorot

Let me clarify: The exposures of 120" @ gain 215 (Uranus-C) and 120" @ gain 1000 (Touptek) — were these all taken with the RASA? I'm asking as an owner of a RASA8 and trying to relate it to my own setup. It seems to me that with 120 seconds and gain 1000, everything would be completely overexposed, but in your case, only the very center appears overexposed.

Apr 27th, 2026

praegerReply to ankorot

All on RASA, the Antlia Quad band filter didn't fit in the description. Without it, everything would indeed have been overexposed in 120 seconds.

Apr 27th, 2026

ankorotReply to praeger

Was this really taken from a light-polluted city?

Apr 27th, 2026

praegerReply to ankorot

Actually, I only shoot in St. Petersburg.

Apr 27th, 2026