M 13

Posted: Apr 19th, 2025

Show astrometry on hover

NGC

Technical Info

Telescope/Lens: Celestron RASA 8

Camera: Player One Uranus-C (IMX585)

Mount: SW EQ6-R Pro

Guide Scope: ZWO 30F4

Guide Camera: ZWO ASI178MM

Software: DeepSkyStacker, GraXpert, FITStacker, Cosmic Clarity, NoiseXterminator, StarXterminator, Photoshop

Exposure:

90 x 120" ISO/Gain: 215 - Player One Uranus-C

48 x 120" ISO/Gain: 1000 - Touptek ATR585C, HCG

White, Bortle 8/9 zone:

St. Petersburg, Russia

Apr 18th, 2025

4 h 36 m

1175

Resolution: 3700x1900 px

Scale: 4490 KB

praeger

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

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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.

27 Apr, 2026 Reply

Praeger Replied 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.

27 Apr, 2026 Reply

Ankorot Replied to Praeger

Was this really taken from a light-polluted city?

27 Apr, 2026 Reply

Praeger Replied to Ankorot

Actually, I only shoot in St. Petersburg.

27 Apr, 2026 Reply

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