M42 (Alan Ćatović)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: Great Nebula in Orion · IC 511 · M 42 · M 43 · NGC 1973 · NGC 1975 · NGC 1976 · NGC 1977 · NGC 1980 · NGC 1982 · The star 42Ori · The star 45Ori · The star θ1Ori · The star θ2Ori · The star ιOri

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M42

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M42

Orion maglina (Messier 42, M42 ili NGC 1976). To je difuzna maglina koja se nalazi južno u sazviježđu Orion. Jedna je od najsvjetlijih maglina, i vidljiva je golim okom. Nalazi se na udaljenosti od oko 1350 svjetlosnih godina i najbliži nam je region formiranja zvijezda. Procjenuje se da joj je prečnik oko 24 svjetlosne godine, a masa joj je veća od mase Sunca oko 2000 puta.

Snimak je napravljen u rejonu Dejčića, na planini Bjelašnici, 19. 12. 2014. Postupak pripreme snimanja sastojao se od nivelacije postolja, te grubog i finog usjeveravanja na NEQ 6 postolju uz pomoć okulara sa osvjetljenom končanicom i dopunskog teleskopa (tragača) manjeg uvećanja. Za snimanje je korišten dslr Canon 500d koji je bio kontrolisan softverski sa Samsung tableta. Između dslr aparata i teleskopa fokusa 900mm (f/7.5) nalazio se flat-field flattener 0.85x koji omogućava više upadnog svjetla i daje šire vidno polje.

Snimanje se sastojalo iz desetak snimaka različite ekspozicije (30“, 1 min, 2 min, 3 min, 4 min) sa sličnim ISO vrijednostima i RAW formatu, uz snimanje tzv. tamnih snimaka radi kalibracije slika i uklanjanja šuma na fotografijama. Slike su kalibrirane, normalizirane i stakirane u softveru Nebulosity. Konačna obrada (levels, curves, saturation, unasharp mask i noise filter) urađena je u programu Photoshop.

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	3273323
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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M42

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Image Index:

Contribution Index (beta):

M42

M42

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Description

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