Recently Browsing 0 members
No registered users viewing this page.
Centaurus A (NGC 5128) is a galaxy in the constellation of Centaurus. It was discovered in 1826 by Scottish astronomer James Dunlop from his home in Parramatta, in New South Wales, Australia.
At 13 million LY, NGC 5128 is one of the closest radio galaxies to Earth and is also the fifth-brightest in the sky, making it an ideal amateur astronomy target.
The galaxy is only visible from below very low northern latitudes but is best seen or imaged from the southern hemisphere.
This image was taken with a NexStar 8SE 8" SCT at 2032mm focal length, PHD2 autoguided CGEM using a astronomy modded Canon 40D DSLR controlled by APT.
It consists of 40 x 300 sec, 30 x 600 sec and 20 x 900 sec ISO800 subs.
Galaxy Centaurus A ( NGC 5128 ) in the southern constellation Centaurus
( please click / tap on image to see full size )
Updated again - to try to bring out more faint detail ...
Updated images ...
( 100% crop )
Centaurus A is relatively near to us in the local group of galaxies and is around 11 Million light years away. The unusual shape of Centaurus A is believed to be due to an ancient collision between a large elliptical galaxy and a much smaller spiral galaxy.
With an apparent magnitude of +6.8, Centaurus A is the fifth brightest galaxy in the night sky and in the middle of the 20th century it was identified as being the strongest radio source in the Centaurus constellation.
Galaxy - Centaurus A ( NGC 5128 )
Image ( Nova.astrometry.net ):
Center (RA, hms): 13h 25m 28.924s
Center (Dec, dms): -43° 01' 25.486"
Size: 60.5 x 41.1 arcmin
Orientation: Up is -89.9 degrees E of N
Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ).
Corrector: ASA 2" Coma Corrector Quattro 1.175x.
Effective Focal Length / Aperture : 1410mm f4.7
Mount: Skywatcher AZ Eq6 GT
Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2
Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)
Format: 14bit NEF
Long exposure noise reduction: off
Calibration: No darks, just master bias and master flat
HDR combination of eight sets of exposures (27, 28 & 29 April 2017):
85 x 240 sec ISO 800
16 x 120 sec ISO 800
16 x 60 sec ISO 800
16 x 30 sec ISO 800
16 x 15 sec ISO 800
16 x 8 sec ISO 800
16 x 4 sec ISO 800
16 x 2 sec ISO 800
Pixinsight May 2017