Hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  NGC 2395
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Abell 21 Medusa nebula, 



    
        

            Johannes Bock
Abell 21 Medusa nebula
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Abell 21 Medusa nebula

Getting plate-solving status, please wait...
Abell 21 Medusa nebula, 



    
        

            Johannes Bock
Abell 21 Medusa nebula
Powered byPixInsight

Abell 21 Medusa nebula

Technical card

Imaging telescopes or lenses: TS-Optics 6" Ritchey Chretien 1370mm

Imaging cameras: Nikon D810 astrocool CentralDS full spectrum

Mounts: SkyWatcher AZ-EQ5 GT pro CG-5 tuned

Focal reducers: TS-Optics 2" CCD Reducer 0,67x

Filters: Optolong L-eXtreme 2"  ·  Hutech IDAS IDAS HEUIB II Ha

Accessory: Lacerta MGEN 2  ·  APM Image Master 50/200


Dates:March 1, 2021

Frames:
Hutech IDAS IDAS HEUIB II Ha: 18x300" (1h 30') ISO1250
Optolong L-eXtreme 2": 57x600" (9h 30') ISO1250

Integration: 11h

Avg. Moon age: 17.13 days

Avg. Moon phase: 93.78%


Basic astrometry details

Astrometry.net job: 4280723

RA center: 7h 29' 6"

DEC center: +13° 12' 54"

Pixel scale: 1.062 arcsec/pixel

Orientation: 94.636 degrees

Field radius: 0.955 degrees


Resolution: 5383x3601

Data source: Backyard

Description

Abell 21 Medusa Nebula

The Medusa Nebula, PK 205+14.1, is a very old planetary nebula in Gemini, on the border with Canis Minor. It also known as Abel 21 and Sharpless 2-274. The Medusa was discovered in 1955, and until the early 1980s it was thought to be a supernova remnant.

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Abell 21 Medusa nebula, 



    
        

            Johannes Bock

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Astrophotography Germany