NGC300 Spiral Galaxy in Sculptor


NGC300 is a faint galaxy in the austral Sculptor constellation.
It is very nice and no so photographed as its better known and more brilliant NGC253 (“Silver Coin” galaxy) neighbour.

The NGC300 galaxy is located at about 6 million light-years away from Earth. This is a typical spiral galaxy and its plane is tilted 42° respect to our line of sight.
Its spiral arms show a bluish coloration because in these areas new stars are being produced, while the central part with older stars show a yellow/brown colour.
It is believed that at the centre of this galaxy there are a couple of dark holes, conforming a binary system that is an important X Ray source.
There are also some reddish spots revealing the places where the energetic radiations coming from the massive young stars are heating and ionizing the gases.

As is common when you shot at a galaxy, it is possible see a lot of other far and (apparently) small galaxies at the background (41 in this picture), as showed in the annotated image:


Technical Data

Acquisition site Pueblo Doyle, Buenos Aires, Argentina
Acquisition date 11-7-2015
Instrument Newton GSO F4 200 with GPU coma corrector.
Mount Sky-Watcher NEQ6, managed by EQmod
Guide Off-Axis, with Lodestar camera
Camera Modified Canon 600D/T3i
No IR Filter (Full Spectrum mod, using Astronomik MC Clear)
Refrigerated (regulated temperature)
Camera sensor temperature 5°C (on-sensor measured and regulated)
Filter Astronomik Clip CLS CCD
Integration 20 x 10 minutes subframes - ISO 1600
Total integration time: 3 hs 20 minutes
Calibration 49 flats, 300 bias, 53 darks.
Resolution 1.1 arcsec/pixel
787 mm actual focal, 4.2 um x 4.2 um pixels
Native size 5202 x 3465 pixels
Cropped size 3200 x 1800 pixels
FOV 58’ x 33’
Image center coordinates RA: 00h 54m 57s
Dec: -37° 40' 20"
Rotation: -173°
Process PixInsight 1.8