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Sh2_157_SHO

            English below

Nel braccio del Perseo della nostra Galassia che si proietta nella costellazione di Cassiopea si trova questa nebulosa che ricorda la chela di un'aragosta. La parte settentrionale forma una sorta di anello per via del vento stellare di stelle giganti.

Esposizioni da 10 minuti per ciascun filtro, 73 per il dualband Antlia ALP-T 5 nm e 52 per l'Optolong L-Synergy. L'elaborazione scelta è la Hubble Palette SHO dove lo zolfo ionizzato (Sii) va nel canale rosso, l'idrogeno ionizzato (H-alfa) nel verde l'ossigeno due volte ionizzato (Oiii) nel blu.
Per catturare le stelle è stata aggiunta circa un’ora di integrazione in pose da 60 secondi con filtro broadband SV260.
L'integrazione totale arriva aquasi 22 ore complessive.
Il tutto è stato ripreso con un telescopio Newton 150/600 dotato di correttore Tecnosky 0.95x, camera Tecnosky Vision 571C e montatura EQ6-R Pro, elaborazione in PixInsight.

This nebula, reminiscent of a lobster's claw, is located in the Perseus arm of our Galaxy, which extends into the constellation Cassiopeia. Its northern portion forms a ring due to the stellar wind from giant stars.

10-minute exposures were taken for each filter: 73 for the dual-band Antlia ALP-T 5 nm and 52 for the Optolong L-Synergy. The Hubble Palette SHO processing was chosen, where ionized sulfur (Sii) is in the red channel, ionized hydrogen (H-alpha) in the green, and doubly ionized oxygen (Oiii) in the blue.
To capture the stars, about an hour of integration was added in 60-second exposures with the SV260 broadband filter.
The total integration time comes to almost 22 hours in total.
The whole thing was captured with a 150/600 Newtonian telescope equipped with a Tecnosky 0.95x corrector, a Tecnosky Vision 571C camera and an EQ6-R Pro mount, processed in PixInsight.
   

Taken on: December 14, 2025

Tags:

Lobsterclawnebula

lobster

HubblePalette

MilkyWay

DeepSkyObject

DeepSpace

deepsky

Nebula

Nebulosa

Telescope

Star

Stars

Astrophotography

Astronomy

Astro

sii

oiii

sh2

halfa

SHO

Cassiopea

Cosmo

Cassiopeia

Space

dso « less

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