The Double Cluster (Frank Colosimo)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 7 Per) · NGC 869 · NGC 884 · The star Misam al Thurayya I (χ Per · chi Persei Cluster · h Persei Cluster

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The Double Cluster

Link: http://www.star-watcher.org/DoubleCluster.html

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The Double Cluster

Link: http://www.star-watcher.org/DoubleCluster.html

The Double Cluster (also known as Caldwell 14) is the common name for the naked-eye open clusters NGC 884 and NGC 869, which are close together in the constellation Perseus. NGC 884 and NGC 869 are at distances of 7600 and 6800 light-years away, respectively, so they are also close to one another in space. The clusters' ages, based on their individual stars, are relatively young. NGC 869 is 5.6 million years old and NGC 884 is 3.2 million years old, according to the 2000 Sky Catalogue.

Date: Dec 2009

Location: New Ringgold PA

Optics: Takahashi FSQ106-ED

Mount: Paramount ME

Camera: Apogee U8300

Exposure: RGB (unbinned): 10 each RGB at 200 seconds each

Processing: Image acquisition using CCD Autopilot. Initial processing was done using Maxim DL with subsequent processing with Photoshop. Spikes added with Star Spike Pro

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Clusters

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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	Image of the day	Top pick	Top pick nominations	Total submitted
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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	6458515
PixInsight job	n/a
PixInsight queue size	n/a
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The Double Cluster

The Double Cluster

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