Observation by David Davies: NGC 4559, Caldwell 36

Uploaded by

David Davies

Observer

David Davies

Observed

2026 Apr 17 - 23:50

Uploaded

2026 Jul 04 - 17:06

Objects

NGC4559

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Constellation

Coma Berenices

Field centre

RA: 12^h35^m
Dec: +27°57'
Position angle: -5°56'

Field size

0°26' × 0°17'

Equipment

250mm RC
X 0.75 reducer
ZWO ASI 071MC camera
SW EQ8 mount

Exposure

60 x 120s RGB

Location

Cambridge, UK

Target name

NGC 4559, Caldwell 36

Title

NGC 4559, Caldwell 36

About this image

Captured in late April, I remember thinking this was the last deep-sky object I could observe before the skies got too bright.

I later discovered that the galaxy contains a Luminous Blue Variable star, AT 2016blu, that is referred to as a supernova impostor. It last flared in March 2026 and can be seen as a tiny, bright star in a region of nebulosity to the right of the galaxy, just below its centre.

Files associated with this observation

NGC4559_C36_web.jpg (1.5 MB)

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