Star Clusters and Nebula in Northwest LMC

Star Clusters and Nebula in Northwest LMC

NGC 1847 - 1865

Constellation: Dorado
Ra: 05h 09m 20s
Dec: -68d 50m 56s
Distance: 170,000 light years
Image Size: 33' x 33'
North: Up and Right; East Up and Left



Most of these NGC objects (see annotated image below) are open star clusters, except NGC 1855, which is a globlular cluster. The frame is centered on NGC 1855 (which also includes NGC 1854). This puts the two more prominent objects, having associated nebulosity, on either side. On the right side is NGC 1850, which is the brightest star cluster in the Large Magellanic Cloud (LMC). It is surrounded by nebulosity that is thought to be a supernova remnant. There is a small bright globular cluster, NGC 1851, just to the lower right of the open cluster. On the left side of NGC1854/55 is NGC 1858 which is an open cluster and emission nebula. Other open clusters are also annotated in the image below. Please see a more extensive summary here. All of these stars are relatively young, between 6-8 million years old. The nebular detail was brought out using hydrogen-alpha (H-a) and oxygen (OIII) narrowband filters, and star colors from RGB filters.


Exposure: 10.8 hrs Total: 5 hrs H-a, 3.5 hrs OIII, 2.3 hrs RGB
Telescope: PlaneWave CDK20, 0.5 m f/6.8 0.54 arcsec/pix
Mount: PlaneWave Ascension 200h
Oag: Astrodon MonsterMOAG
Acquisition: ACP-Expert
Calibration: CCDStack2
Observatory Site: iTelescope, Siding Spring, NSW, Australia
Camera: SBIG STX 16803
Filters: Astrodon 5nm H-a, 3nm OIII, Gen 2 RGB
Guider: Starlight Xpress Lodestar
Camera Operation: Maxim 5.24
Processing: Photoshop CC 2020
Image Date: 10/31/2019 - 12/22/2019

Submit a Comment

Your email address will not be published. Required fields are marked *

The reCAPTCHA verification period has expired. Please reload the page.