M94_LRGB_27-3-2020

Well I first imaged M94 three years ago but never managed to get the outer ring so I thought it was time I added to this data to get a better result. I have add an addition 28 min of green, 28 min of blue and 12 min of red. I’ve also obtained an additional 40 min of luminance. This is has increased the total Integration time from 2h 36min to 4h 24min, nearly an additional two hours of data.

 

Object Description:-

M94, also known as NGC 4736, is a face on spiral galaxy in the constellation Canes Venatici. M94 has an inner ring diameter of approx. 5,400 LY and an outer ring diameter of approx. 45,000 LY. The inner ring is an area of strong star formation activity. From Earth Its has an apparent dimension of 11.2 x 9.1 arc sec and a visual mag of 8.99 and lies at distance of 16 million LY.

 

EQUIPMENT:-

Telescope Meade 6000 115mm and AZ-EQ6 GT

ZWO ASI1600mm-Cool camera

Orion Mini Auto Guide

ZWO LRGB Filters

Chip Temp Cooled to -20 degC

 

IMAGING DETAILS:-

M94 (Canes Venatici)

Gain 139 (Unit Gain)

22 Red subs@120sec (44 min)

30 Green subs@120sec (1h min)

30 Blue subs@120sec (1h min)

50 Lum subs@120sec (1h 40min)

Total imaging Time 4h 24 min

Dithering

20 Darks

No Flats

 

PROCESSING/GUIDING SOFTWARE:-

APT "Astro Photograph Tools"

DSS

PS CS2

Done