Sh2-308 Dolphin Head

 Posted: Mar 19th, 2026
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NGC
IC
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Technical Info
Telescope/Lens: Askar SQA 106 мм f/4.8
Camera: ZWO ASI 2600 MC
Mount: Ioptron HAE 29 C
Guide Scope: Askar 52 мм F4
Guide Camera: ZWO ASI 120 MM mini
Software: SharpCap 4.0, DSS, Siril, Adobe Photoshop
Exposure:
48 x 300" ISO/Gain: 100 - Askar D1 DUO (Oiii+Ha) 6 нм
Green, Bortle 4 zone:
 Adygeya Stanica Dahovskaya, Russia
 Mar 9th, 2025
4 h 0 m
40
Resolution: 3103x2359 px
Scale: 861 KB

It surrounds the Wolf-Rayet star EZ Canis Majoris.

Distance is about 5,000 light-years.

Diameter is about 60 light-years.

The star EZ Canis Majoris is expected to eventually explode as a supernova, consuming the nebula.

Apparent size is 35 arcminutes.

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