Galaxy NGC 7331 and supernova 2025rbs

Posted: Aug 14th, 2025

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NGC

Technical Info

Telescope/Lens: Sky-Watcher Explorer 200PDS

Camera: ZWO ASI533MC Pro

Mount: Sky-Watcher EQ6-R Pro

Guide Scope: SVBONY Guide Scope SV106 60mm F/4

Guide Camera: ZWO ASI178MM

Software: GraXpert, PixInsight, PS

Accessories: Sharpstar 0.95x MPCC, ZWO ASIAIR Plus

Exposure:

70 x 300" ISO/Gain: 100 - Optolong uv/ir cut

Orange zoneLight Pollution:

Kolomna, Russia

Aug 28th, 2025

GALAXY NGC 7331 AND SUPERNOVA 2025RBS

Telescope/Lens: Sky-Watcher Explorer 200PDS
Camera: ZWO ASI533MC Pro
Mount: Sky-Watcher EQ6-R Pro
Guide Scope: SVBONY Guide Scope SV106 60mm F/4
Guide Camera: ZWO ASI178MM
Software: GraXpert, PixInsight, PS
Accessories: Sharpstar 0.95x MPCC, ZWO ASIAIR Plus

Kolomna, Russia
Light Pollution: Orange zone

Exposure:
70 x 300" ISO/Gain: 100 - Optolong uv/ir cut

Captured over 3 nights: 28, 29, 30-07-2025 2025rbs is already the fourth supernova in the last 65 years in this galaxy. The supernova is classified as type Ia. The explosion mechanism: - A white dwarf accretes (pulls in) matter from a companion star - Upon reaching a critical mass of ~1.4 solar masses (Chandrasekhar limit), an uncontrolled thermonuclear reaction is triggered, leading to an explosion and the complete destruction of the star Galaxy diameter: 130,000 light years Distance from the Sun: 43 million light years Angular size: 10 x 4 arcminutes Background galaxies (NGC 7335, 7336, 7337, 7340) are located at a distance of 330-400 million light years.

Original size: https://deepskyhosting.com/DQhMWEM
Author: Evgeniy Sergeev

5 h 50 m

1180

Captured over 3 nights: 28, 29, 30-07-2025

2025rbs is already the fourth supernova in the last 65 years in this galaxy.
The supernova is classified as type Ia. The explosion mechanism:
- A white dwarf accretes (pulls in) matter from a companion star
- Upon reaching a critical mass of ~1.4 solar masses (Chandrasekhar limit), an uncontrolled thermonuclear reaction is triggered, leading to an explosion and the complete destruction of the star

Galaxy diameter: 130,000 light years
Distance from the Sun: 43 million light years
Angular size: 10 x 4 arcminutes

Background galaxies (NGC 7335, 7336, 7337, 7340) are located at a distance of 330-400 million light years.

Resolution: 3474x2870 px

Scale: 3229 KB