File:M7 9a14.png
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Summary
editDescriptionM7 9a14.png |
Messier 7 / M7 / NGC 6475 / The Ptolemy Cluster NGC 6453 M7 is a bright, loose open cluster in the constellation of Scorpius. It is about 980 light years away and it is estimated to be 200 million years old. From our perspective, M7 lies in front of the Galactic Center (the center of the Milky Way). As a result, the dense star field behind this cluster is the richest of all Messier objects and one of the richest in the entire night sky. NGC 6453 is a globular cluster about 38,000 light years away. It is heavily obscured by interstellar dust since it lies behind the Galactic Center. The cluster appears as a golden clump between M7 and the left edge of the frame. 2 years ago, my first attempted deep-sky image featured M7: 1 year ago, this was my much-improved result: Total integration: 16 hours 37.5 minutes (997.5 minutes) 06/22/19: 307 x 30 seconds ISO800 08/17/19: 62 x 60 seconds ISO200 08/19/19: 168 x 60 seconds ISO200 06/25/20: 90 x 120 seconds ISO200 06/28/20: 55 x 120 seconds ISO200 06/29/20: 94 x 120 seconds ISO200 07/14/20: 68 x 120 seconds ISO200 Camera: Canon T3i (stock / unmodified / unmodded DSLR) Telescope: Explore Scientific ED80 f/6.0 Apochromatic Refractor (with ES field flattener) Mount: Orion Sirius EQ-G Guide scope: Svbony 50mm f/4.0 Guide Scope Guide camera: Orion StarShoot AutoGuider Software: N.I.N.A. with PlateSolve2 and PHD2 Bortle Class 7 ~18.44 mag/arcsec^2 (Coral Springs, FL) Stacked with PixInsight, processed with PixInsight and Paint.NET |
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Source | M7_9a14 |
Author | Horizon Productions SFL |
Licensing
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This work has been released into the public domain by the author on Flickr, where the author has declared it as a "Public Domain Work" and tagged it with the Creative Commons Public Domain Mark.
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This image was originally posted to Flickr by horizon_productions_sfl at https://flickr.com/photos/149919600@N07/50194779596. It was reviewed on 26 December 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
26 December 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 09:38, 26 December 2020 | 4,650 × 3,100 (27.37 MB) | Fabian RRRR (talk | contribs) | =={{int:filedesc}}== {{Information |Description=Messier 7 / M7 / NGC 6475 / The Ptolemy Cluster NGC 6453 M7 is a bright, loose open cluster in the constellation of Scorpius. It is about 980 light years away and it is estimated to be 200 million years old. From our perspective, M7 lies in front of the Galactic Center (the center of the Milky Way). As a result, the dense star field behind this cluster is the richest of all Messier objects and one of the richest in the entire night sky. NGC 64... |
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Horizontal resolution | 47.23 dpc |
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Vertical resolution | 47.23 dpc |