Hemisphere:  Southern
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Westerlund 1 Super Cluster, 


            Rodney Watters

Westerlund 1 Super Cluster

Technical card

Imaging telescopes or lenses: Tak TSA120

Imaging cameras: QSI 683 ws-8

Mounts: EQ8

Guiding telescopes or lenses: Tak TSA120

Guiding cameras: Starlight Xpress Lodestar x2

Focal reducers: Takahashi TOA Reducer .75x

Software: Pixinsight 1.8  ·  Sequence Generator Pro

Filters: Astronomik Ha 1.25" 6nm  ·  Astronomik Red  ·  Green  ·  Blue

Dates:July 23, 2019July 24, 2019July 25, 2019July 28, 2019July 30, 2019

Blue: 27x300" -20C bin 1x1
Green: 33x300" -20C bin 1x1
Astronomik Ha 1.25" 6nm: 18x1800" -20C bin 1x1
Astronomik Luminance: 30x300" -20C bin 1x1
Astronomik Red: 30x300" -20C bin 1x1

Integration: 19.0 hours

Darks: ~50

Flats: ~50

Bias: ~100

Avg. Moon age: 23.62 days

Avg. Moon phase: 37.38%

Astrometry.net job: 2860671

RA center: 16h 46' 42"

DEC center: -45° 47' 20"

Pixel scale: 1.646 arcsec/pixel

Orientation: -87.265 degrees

Field radius: 0.914 degrees

Resolution: 3172x2438

Locations: Glanmire Home Observatory, Bathurst, NSW, Australia

Data source: Backyard


This image captures the area of sky around the super cluster - Westerlund 1. The cluster has attracted a lot of attention from astronomers due to the large collection of super massive stars from which the cluster is comprised. The cluster, and the surrounding areas, appear very red due atmospheric extinction caused by the clouds of dust in the Milky Way. This area of sky is located in the constellation of Ara in near the tail of Scorpius and close to the constellation of Norma. The image makes for nice viewing with the scattering of Ha regions and the distinctive dark nebula running across the image. The dark nebula kind of looks like a sea horse dance across the field of stars.



Rodney Watters
License: None (All rights reserved)

Sky plot

Sky plot


Westerlund 1 Super Cluster, 


            Rodney Watters