Open Cluster Trumpler 5 (Tr5) (Nick Large)

Celestial hemisphere: Northern · Constellation: Monoceros (Mon) · Contains: HD46783 · HD47106 · HD47157 · PGC 136495

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Open Cluster Trumpler 5 (Tr5)

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Open Cluster Trumpler 5 (Tr5)

The old open cluster Trumpler 5 (Tr5), aka Collinder 105 (Cr105), is 2.4 billion years old. At that age, all of its blue stars have died. The cluster still holds on to most of its stars, because the cluster was clearly born quite massive. Many open clusters are destroyed as a consequence of interactions with molecular clouds on time scales of a few hundred million years or less. Thus, few very old clusters are believed to have survived up to the present stage. Tr5 is almost certainly located in a "quiet" part of the Milky Way, where it is not disturbed by the passage of large molecular clouds. It is located behind some nebulosity that can be seen in this image.

Nikon Imagers
iOptron Skyguider Pro
Texas Astronomy
Astrophotographes (France)
William Optics ZenithStar Z61/Z81
DSLR and mirrorless astrophotography
Deep Sky Northern Hemisphere

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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	Advanced success
Started	...
Astrometry.net job	9218160
PixInsight job	0TOBC2YPUA1E3EXOIUPH14SMBH9K2SM3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h36m29s.20
RA (top/left)	06h39m01s.13
RA (top/right)	06h33m21s.16
RA (bottom/right)	06h33m57s.55
RA (bottom/left)	06h39m35s.87

Dec (center)	+09°29′23″.4
Dec (top/left)	+10°05′54″.10
Dec (top/right)	+09°53′50″.6
Dec (bottom/right)	+08°52′58″.9
Dec (bottom/left)	+09°04′56″.9

Image Index:

Contribution Index (beta):

Open Cluster Trumpler 5 (Tr5)

Open Cluster Trumpler 5 (Tr5)

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Image Index:

Contribution Index (beta):

Open Cluster Trumpler 5 (Tr5)

Open Cluster Trumpler 5 (Tr5)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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