Finding the Double Cluster

Double Cluster is located between Miram (Eta Persei) In Perseus & Ruchbah (Delta- Cassiopeiae) in Cassiopeia. Locate the bright star Mirfak in Perseus then follow the three stars pointing towards the Cassiopeia Constellation. The last of these stars is Miram. Now imagine a line running from Miram towards Cassiopeia and the first star you meet is Ruchbah. If you divide this line in to three then the Double Cluster is either one third from Miram or two thirds from Ruchbah. The Cluster is slightly offset from this line. You can also draw a direct line between Mirfak in Perseus and Navi in Cassiopeia and the Cluster is half way and smack on this line. Imaging Clusters are fairly easy to image once you have found the subject and framed your image. You should be able to snap these brighter clusters with just one sub but it is best to play about with the ISO settings and Exposure to bring out more stars within the cluster until you are happy. There was no need for me to stack 10 subs in the image above but either way it came out ok and stacking more subs could possibly show up some of the fainter stars in the cluster.
Double Cluster

Specification

Date Taken: 20/03/2018 Telescope: Altair StarWave 70ED Diameter: 70mm Focal Length: 420mm Mount: SkyWatcher Star Adventurer Camera: Canon EOS 1000D ISO: 400 Exposure Light Frames: 10 x 60 sec ISO 400 Dark Frames: 20 x 82 seconds Bias Frames: Flat Frames: Stacking program: DeepSkyStacker Post Processing: Photoshop CS3

NGC 869

Description: Open Cluster Common Name: Double Messier Catalogue: N/A NGC: 869 Constellation: Perseus Size: 18 Arc Minutes Visual Magnitude: +5.3 Distance: 6.8 Kilo Light Years

NGC 884

Description: Open Cluster Common Name: Double Cluster Messier Catalogue: N/A NGC: 884 Constellation: Perseus Size: 18 Arc Minutes Visual Magnitude: +6.09 Distance: 9.6 Kilo Light Years
(Image from SkySafari 5 Pro)
(Image from SkySafari 5 Pro)
Circumpolar, Never Sets
© Paul’s Astrophotography 2020

Finding the

Double Cluster

Double Cluster is located between Miram (Eta Persei) In Perseus & Ruchbah (Delta- Cassiopeiae) in Cassiopeia. Locate the bright star Mirfak in Perseus then follow the three stars pointing towards the
Double Cluster

Specification

Date Taken: 20/03/2018 Telescope: Altair StarWave 70ED Diameter: 70mm Focal Length: 420mm Mount: SkyWatcher Star Adventurer Camera: Canon EOS 1000D ISO: 400 Exposure Light Frames: 10 x 60 sec ISO 400 Dark Frames: 20 x 82 seconds Bias Frames: Flat Frames: Stacking program: DeepSkyStacker Post Processing: Photoshop CS3

NGC 869

Description: Open Cluster Common Name: Double Messier Catalogue: N/A NGC: 869 Constellation: Perseus Size: 18 Arc Minutes Visual Magnitude: +5.3 Distance: 6.8 Kilo Light Years

NGC 884

Description: Open Cluster Common Name: Double Cluster Messier Catalogue: N/A NGC: 884 Constellation: Perseus Size: 18 Arc Minutes Visual Magnitude: +6.09 Distance: 9.6 Kilo Light Years
Circumpolar, Never Sets
Cassiopeia Constellation. The last of these stars is Miram. Now imagine a line running from Miram towards Cassiopeia and the first star you meet is Ruchbah. If you divide this line in to three then the Double Cluster is either one third from Miram or two thirds from Ruchbah. The Cluster is slightly offset from this line. You can also draw a direct line between Mirfak in Perseus and Navi in Cassiopeia and the Cluster is half way and smack on this line. Imaging Clusters are fairly easy to image once you have found the subject and framed your image. You should be able to snap these brighter clusters with just one sub but it is best to play about with the ISO settings and Exposure to bring out more stars within the cluster until you are happy. There was no need for me to stack 10 subs in the image above but either way it came out ok and stacking more subs could possibly show up some of the fainter stars in the cluster.
© Paul’s Astrophotography 2020