Omega Centauri ( NGC 5139 ) - by Mike O'Day ( 500px.com/MikeODay ).

A deep look at Omega Centauri ( NGC 5139 ) - by Mike O'Day ( 500px.com/MikeODay )

This image is an attempt to look deeply into the mighty Omega Centauri star cluster and, by using HDR techniques, record as many of its faint members as possible whilst capturing and bringing out the colours of the stars, including in the core.

Image details:

Resolution ........ 0.587 arcsec/px
Rotation .......... 0.00 deg
Focal ............. 1374.64 mm
Pixel size ........ 3.91 um
Field of view ..... 58' 33.7" x 38' 53.9"
Image center ...... RA: 13 26 45.38 Dec: -47 28 16.6

Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ).
Corrector: ASA 2" Coma Corrector Quattro 1.175x.
Effective Focal Length / Aperture : 1470mm f4.7

Mount: Skywatcher EQ8
Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2

Camera:
Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)

Location:
Blue Mountains, Australia
Moderate light pollution ( pale green zone on darksitefinder.com map )

Capture ( July 2018 ):
8 sets of sub-images with exposure duration for each set doubling ( 2s to 240s ) all at ISO 250.
200 x 249sec + 10 ea for other exposures

Processing:
Calibration: master bias, master flat and master dark

Integration in8 sets
HDR combination

Pixinsight Dec 2018

Links:
500px.com/MikeODay
photo.net/photos/MikeODay
www.flickr.com/photos/mike-oday

Taken on: January 6, 2019

Tags:

omega

centauri

5139

globular

star

cluster

southern

hemisphere

astronomy

astrophotography

astro

nikon

d5300

orion

optics

ct12

newtonian

telescope

asa

coma

corrector

quattro

skywatcher

az eq6

pixinsight

mikeoday

mike

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