M42 (Bernard DELATTRE)

Celestial hemisphere: Southern · Constellation: Orion (Ori) · Contains: 41 the01 Ori · 43 the02 Ori · 44 iot Ori · De Mairan's nebula · Great Nebula in Orion · Hatysa · M 42 · M 43 · NGC 1976 · NGC 1980 · NGC 1982 · Sh2-281 · The star θ1Ori · The star θ2Ori · The star ιOri

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M42

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M42

La nébuleuse d'Orion, connue aussi sous le nom de M42. Elle présente au télescope un des plus beaux spectacles du ciel. Le gaz brillant de M42 entoure les jeunes étoiles chaudes situées au bord d'un immense nuage moléculaire se situant à environ 1 350 années-lumière de la Terre. Au cœur de la nébuleuse, quatre étoiles bleues, formant un trapèze, illuminent à grande distance la matière dispersée dans l'espace. Les atomes absorbent la lumière stellaire et la réémettent selon leurs couleurs propres, celles de l'oxygène c’est à dire dans le vert, l'hydrogène et l'azote dans le rouge.

Les observations radio astronomiques nous révèlent que la nébuleuse d'Orion n'est qu'une infime partie du grand nuage opaque d'Orion.

De la contraction de ce nuage sont nées les étoiles du Trapèze, de même qu'un groupe de nébuleuses proto-stellaires situé derrière la nébuleuse d'Orion.

La Nébuleuse d'Orion offre une des plus belles opportunités d'étudier la naissance des étoiles.

C'est la plus grande et la plus proche région de formation stellaire.

Les nébuleuses diffuses par réflexion sont constituées d’hydrogène, l’élément le plus abondant de l’Univers, mais aussi de poussières.

ZWO ASI1600MM/QHY163M
N.I.N.A. Users
Narrowband imaging

0a.Most Recent
2b.NarrowBand S2-Ha-OIII
5. MESSIER
Ctlg NGC
Ctlg Sh2 (nébuleuses diffuses)
Nébuleuses diffuses par émission & réflexion

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	Advanced success
Started	...
Astrometry.net job	1962831
PixInsight job	T7ELD5O5JBM7ZQ13I8QEABL6UK0HY9EL
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h34m43s.28
RA (top/left)	05h37m06s.30
RA (top/right)	05h32m17s.86
RA (bottom/right)	05h32m19s.98
RA (bottom/left)	05h37m08s.92

Dec (center)	-05°29′04″.0
Dec (top/left)	-05°00′38″.2
Dec (top/right)	-05°01′27″.5
Dec (bottom/right)	-05°57′29″.9
Dec (bottom/left)	-05°56′40″.3

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M42

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