M51 interaction (Alan Ćatović)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: IC 4263 · M 51 · NGC 5169 · NGC 5173 · NGC 5194 · NGC 5195 · NGC 5198 · Whirlpool galaxy

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M51 interaction

Lokacija i datum: Sarajevo, 04.08.2016.

Oprema: SW APO 120mm/900mm, NEQ6, Canon 350D mod, FR FF 0,85x

Vođenje: QHY-5II, PHD

Ekspozicija: 70 min

Obrada: Nebulosity, Pixinsight, Photoshop, Lightroom

Galaksija Vrtlog poznata još kao Messier 51a je spiralna galaksija u sazviježđu Lovački psi. Otkrio ju je Charles Messier 1773. godine. Pratilju je otkrio Pierre Méchain 1781. godine.

Galaksija M51a je spiralna galaksija tipa SA. Praćenjem sjaja supernova određena je njena udaljenost od 23 miliona svj. godina. Starije procjene su je smještale na udaljenost od 30 do 37 miliona svj. godina. Prividni promjer galaksija je 11.2 lučne minute što odgovara linearnim dimenzijama od 76,000 svj. godina. Masa galaksije je oko 1.6×1012 sunčevih masa. M51 je dimenzijama i masom upola manja od naše galaksije, Mliječne staze.

Veoma izražena spiralna struktura M51a posljedica je utjecaja sudara s M51b (NGC 5195) u prošlosti. Sudari su se odigrali u dva navrata. Prvi sudar se dogodio prije 500 do 600 miliona godina. U tom sudaru, NGC 5195 je prošla kroz disk M51a. U drugom sudaru koji se dogodio prije 50 do 100 miliona godina NGC 5195 prišla je iz pozadine M51a i ponovno prošla kroz disk. Danas se NGC 5195 nalazi iza M51a. Oblaci plina i prašine u spiralnim krakovima M51 urušili su se zbog sudara s NGC 5195. Posljedica toga je nastanak mnogih regija u kojima se formiraju zvijezde. Te regije slične su maglicama M42 i M8.

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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.

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.
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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	3273404
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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