The first album cover below shows my image of NGC 4725 a ring shaped intermediate barred spiral galaxy having a single spiral arm extending from an oval shaped ring. This is a 9th magnitude galaxy located 42 million light years from Earth. At 100,000 light years in diameter it is roughly the same size as our own galaxy; it extends a rather small 9 arcminutes across the night sky.
The total integration time for this LRGB image was 10 hours and 16 minutes consisting of 10 five minute exposures with a red filter on Jul 29 2016, 5 five minute exposures with a green filter on Jul 29 2016, 27 four minute exposures with a luminance filter on Jul 17, 2016, 14 five minute exposures with a blue filter on Jul 11 2016, 16 six minute exposures and 1 seven minute exposure with a luminance filter on Jul 6 2016, 27 five minute exposures with a luminance filter on Jun 29 2016, 4 ten minute exposures with a red filter, 4 ten minute exposures and 1 five minute exposure with a green filter, and 4 ten minute exposures with a blue filter on Jun 26 2016.
In addition to my C11 SCT I used a monochrome ATIK 460EX main imaging camera, a Lodestar X2 guide camera, an On Axis Guider, an F/6.3 Reducer, a luminance filter, RGB filters, and a Starlight Instruments motorized programmable focuser control system.
If you have any questions about my method for capturing or processing this image please ask me at: Peter.Nerbun@gmail.com
Size: 6 items
(447 items total)