M 1 ( Constantino)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: M 1 · NGC 1952

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M 1

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M 1

Urban Astrophotography

Bortle scale 9_SQM 16.23 mag/arc.seg²

Sombrero Observatory - Póvoa de Varzim-Porto

PORTUGAL

First documented by Chinese and Arab ancestors in April or May 1054, when a giant star (SuperNova Remnant) exploded, it remained visible during the day, 23 days, creating what is now known as M1 (Messier catalog) the Nebula of the Crab.

The Crab Nebula is “home” to a pulsar, a highly dense and rapidly rotating star, about 20 kilometers in diameter. The pulsar's "beams" spin once every 33 milliseconds, or 30 times every second, and are one of the largest generators with the highest emission of a nebula, launching everything from radio waves to gamma rays.

The Crab Nebula is a planetary nebula in the constellation Taurus.

Distance from Earth: 6523 light years, Radius: 5.5 light years, Age: 966 years

Acquisition of images 12/23/2020 to 1/3/2021, total 8.7 hours.

Technical note: LRGB (23 + 09 + 09 + 09), exposure times 200 seconds.

H alpha: SII: OIII (28 + 21 + 22), exposure times 300 seconds.

Light Polluted skies

Please note: The following tables are updated every 24 hours.

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	Basic success
Started	...
Astrometry.net job	4184314
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Contribution Index (beta):

M 1

M 1

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Image Index:

Contribution Index (beta):

M 1

M 1

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

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