NGC 6888 HOO (rbarbout)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg) · Contains: Crescent Nebula · NGC 6888

Powered byPixInsight

NGC 6888 HOO

Powered byPixInsight

NGC 6888 HOO

Découverte par William Herschel en 1792, la nébuleuse du Croissant (NGC 6888) est une nébuleuse en émission située à environ 5 000 années-lumière dans la constellation du Cygne.
Cette bulle de Wolf-Rayet est issue des rapides vents stellaires créés par l'étoile Wolf-Rayet WR 136 qui poussent la matière issue de vents plus lents éjectés par cette même étoile lorsqu'elle était une géante rouge il y a 400 000 ans.
La collision de ces deux vents de matière forme une coque et deux ondes de choc, l'une progressant vers l'extérieur et l'autre vers l'intérieur.
(source: wikipedia)
L'image est prise avec un filtre bi-bande Ha-OIII faisant apparaitre l'hydrogène en rouge et l'oxygène en bleu.

Prise le 10 Août 2022 - Yvelines - France - Bortle 4-5
HOO: 30x300s (2h30), Gain 121, Offset 10, Temp. -10°C
RGB: 10x60s (0h10) pour les étoiles
60 Darks, 11 Flats, 60 DarkFlats
Caméra ZWO ASI294MC pro + Filtre Optolog L-eXtreme
Newton SW 150/750 + Correcteur de Coma GPU
Monture SW HEQ5 pro Goto
Guidage par ASI290MM sur Diviseur Optique ZWO
Aquisition : APT 4.01 + PHD2 2.6.11
Traitement : Pixinsight 1.8.9 + SiriL 1.0.6 + DXO Photolab 4

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	6679975
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

NGC 6888 HOO

NGC 6888 HOO

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC 6888 HOO

NGC 6888 HOO

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information