Medusanebel (Franz Gruber)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: NGC 2395 · PGC 139019 · PGC 1424362 · PGC 1426182 · PGC 1432041 · PGC 1435465 · PGC 1435525 · PGC 1435645 · PGC 1435767 · PGC 1436375 · PK205+14.1 · Sh2-274

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Medusanebel

Link: https://brentenriegel.at/ergebnisse/a221218-btb-medusanebel

Powered byPixInsight

Medusanebel

Link: https://brentenriegel.at/ergebnisse/a221218-btb-medusanebel

BTB AstroTeam Sternwarte Brentenriegel

Abell 21 oder Sharpless 2-274, auch bekannt als Medusa-Nebel ist ein ausgedehnter planetarischer Nebel im Sternbild Zwillinge nahe der Ekliptik.
Seinen Eigennamen verdankt der Nebel den schlangenartigen roten Gasfilamenten, welche an das Haar der Sagengestalt Medusa erinnern.

Das Objekt ist nicht zu verwechseln mit dem Galaxienhaufen Abell 21 oder den verschmelzenden Galaxien NGC 4194,
die aufgrund ihrer Erscheinung manchmal auch mit dem Medusenhaupt in Verbindung gebracht werden.

Neu in der bisherigen astrofotografischen Darstellung ist die Dokumentation der blau-grünen Stoßwellen aus OIII im nördlichen Außenbereich,
welche eine gesonderte Belichtungszeit von beinahe 6 Stunden bei bin 2x2 und eine spezielle Bildbearbeitung (Continuum Substraction) erforderten.

Aufnahmezeit: 17 bis 29. Dezember 2022
Gesamtbelichtung 16,38 h RGB_(SH)OO
Davon:
Ha 25x600s , OIII 34x600a, SII 24x600s

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	7009683
PixInsight job	SN7C7I75ES331U4YYLHL03TS8D5T6GJS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h28m26s.820
RA (top/left)	07h30m09s.354
RA (top/right)	07h26m45s.663
RA (bottom/right)	07h26m44s.343
RA (bottom/left)	07h30m07s.665

Dec (center)	+13°23′25″.48
Dec (top/left)	+13°39′33″.73
Dec (top/right)	+13°40′07″.61
Dec (bottom/right)	+13°07′12″.88
Dec (bottom/left)	+13°06′40″.14

Image Index:

Contribution Index (beta):

Medusanebel

Medusanebel

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Image Index:

Contribution Index (beta):

Medusanebel

Medusanebel

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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