M1 (Alan Ćatović)

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

M1

Maglina Rakovica ili M1 (NGC 1952, Taurus A), snimljena sa Prečanskog polja (Sarajevo), decembar, 2014. Maglica Rakovica, koja inače predstavlja ostatak supernove SN 1054, postala je sa Zemlje vidljiva 4. jula 1054. godine. Kineski astronomi opisali su supernovu kao 4 puta sjajniju od Venere što znači da je imala prividnu magnitudu od -6. Supernova je bila 23 dana vidljiva po danu i još 653 dana po noći. Prema tim podacima pretpostavlja se da je SN 1054 bila supernova tipa 2. Vjeruje se da je masa zvijezde koja je eksplodirala u SN 1054 bila između 8 i 12 Sunčevih masa. Supernova je iza sebe ostavila oblak užarenog plina koji se polako širi. Taj ovalni oblak plina ima dimenzije od 6′ dužine i 4′ širine. Na udaljenosti od 6 300 svjetlosnih godina to odgovara promjeru od 11 svjetlosnih godina. Plin koji danas vidimo se većinom sastoji od ioniziranog helija ili vodika s primjesama ugljika, kiseonika, neona, nitrogena, željeza i sumpora. Fotografije otkrivaju njenu vlaknastu strukturu, specifičnu za ostatke supernova, sjajnije središe i optički pulsar. Temperatura plina je od 11 000 K do 18 000 K. Vjeruje se da je pulsar unutar magline M1 tijelo promjera 28-30 km koje svake 33 milisekunde odašilje puls zračenja. Tehnika snimanja: – Light i dark frames (sa različitim ekspozicijama) – Kalibriracija,normalizacija i stakiranje u programu Nebulosity. – Finalna obrada u programima PixInsight i Photoshop.

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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	Basic success
Started	...
Astrometry.net job	3273379
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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