NGC 7293, Helix Nebula, HαRRGB (OSC), 5 & 7 Sep 2015 (David Dearden)

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: Helix nebula · NGC 7293 · PK036-57.1

Powered byPixInsight

NGC 7293, Helix Nebula, HαRRGB (OSC), 5 & 7 Sep 2015

Thought I'd add some Hα to my recent Helix Nebula image. Focused and synched on Altair, then did the long goto even before the Helix cleared the mountainside. I waited for it to rise and lo and behold, it was in the field of view! Clear and cool weather, little or no wind, and more careful east weighting of my mount, so much better guiding performance than I had when I took the RGB data. Started the session and went to bed. Had some trouble getting flats because the sky brightness was changing rapidly as I shot them.

Hα Data

Date: 7 Sep 2015

Subject: NGC 7293, Helix Nebula

Scope: AT8IN + Antares 0.5x Telereducer

Filter: Baader 7 nm Hα

Mount: CG-5 (Synta motors, PicGoto Simplificado)

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.5.0.1 (Win 7 ASCOM)

Camera: DSI IIc, no chiller CCD 19 °C

Acquisition: Nebulosity 4.0.2, no dither

Exposure: 30x600 s

Stacking: Neb 4, bad pixel map, bias included, 76 flats, extract R channel, match histograms, square, trans+rot align, DSS 2x drizzle 1.75 κ-σ stack.

Processing: StarTools 1.4.305 Crop; Wipe 75%; Develop 84.22%; HDR equalize; Deconvolute 5.0 pix; Track 7.0 pix, Smoothness 92%;. CS6 Astronomy Tools repeated deep space, space noise reduction with layer masks to reduce effects on nebula; repeated levels & curves.

HαRRGB combination of RGB from 5 Sep 2015 with Hα from 7 Sep 2015.

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	766607
PixInsight job	VAEPFTVAC0F1MUEQQWCY51OMTBKPTAYG
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	22h29m37s.51
RA (top/left)	22h31m04s.40
RA (top/right)	22h28m06s.34
RA (bottom/right)	22h28m10s.41
RA (bottom/left)	22h31m08s.95

Dec (center)	-20°50′38″.2
Dec (top/left)	-20°32′24″.8
Dec (top/right)	-20°33′50″.8
Dec (bottom/right)	-21°08′49″.4
Dec (bottom/left)	-21°07′20″.2

Image Index:

Contribution Index (beta):

NGC 7293, Helix Nebula, HαRRGB (OSC), 5 & 7 Sep 2015

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC 7293, Helix Nebula, HαRRGB (OSC), 5 & 7 Sep 2015

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