Medusa Nebula

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Medusa Nebula
Planetary nebula Lists of nebulae
No image.
Observation data
(Epoch J2000.0)
Right ascension 07h 29.3m
Declination +13° 14′
Distance 1000 ly
Apparent magnitude (V) +11.3
Apparent dimensions (V) 10.2 arcmin
Constellation Gemini
Physical characteristics
Radius  ?
Absolute magnitude (V)
Notable features Very large and very low surface brightness
Other designations Abell 21, PK205+14.1, ARO 388

The Medusa Nebula is a very old and large planetary nebula in the constellation of Gemini on the Canis Minor border. As it is so big, its surface brightness is very low, with surface magnitudes of between +15.99 and +25 reported. Because of this most websites recommend at least an 8-inch telescope with an OIII filter to find this object although probably possible to image with smaller apertures.

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