IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017 (David Dearden)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: IC 1396

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017, David Dearden

Powered byPixInsight

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017

Powered byPixInsight

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017

Playing with the ST-80 scope + ASI1600MM-Cool camera. I originally imaged this through a lot of smoke and moonlight, and decided to try again under better conditions. Wow, that made a huge difference! This image is uncorrected and shows terrible field curvature around the edges. Still, way better than I got with the DSI IIc. I intend to add OIII and SII to this later, but it looks like the weather is turning bad on me just as the Moon fades so it may be a while before that can happen.

Date: 11 Sep 2017

Subject: IC 1396, Elephant Trunk Nebula

Scope: Orion ST-80

Filters: ZWO 31 mm diameter unmounted Hα(7 nm bandpass)

Mount: EQ-6 (EQMOD 2.000j)+PEC

Guiding: Orion Thin Off-axis Guider + DSI +PHD 2.6.3.7 (Win 10 ASCOM) using predictive PEC algorithm

Camera: ASI1600MM-Cool, -20 °C, Gain 139 Offset 21

Acquisition: Sequence Generator Pro 2.6.0.24

Exposure: 70x300 Hα

Stacking: Neb 4.1.6, flats & darks, trans+rot align, Nebulosity 1.5σ stack and align.

Processing: StarTools 1.4.328: Stretched and deconvoluted in StarTools. Several rounds of curves+levels in Photoshop.

Original
B
Final
C

B

Description: Same data, but with an attempt at digital field flattening using StarTools’ “Lens” module. I must have overdone it, because it wouldn't plate solve.

Uploaded: ...

C

Description: Binned 2x2, and not "flattened" quite as much (I want to see if it will plate solve).

Uploaded: ...

ZWO ASI1600MM/QHY163M
Narrowband imaging
Low-Cost Astrophotography

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 failed
Started	...
Astrometry.net job	1726206
PixInsight job	OYIXMX20V0ISQ9CZRD81NBH24XQTVC1C
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

Image Index:

Contribution Index (beta):

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017

IC 1396, Elephant Trunk Nebula, Hα, 11 Sep 2017

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

In these public groups

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?

Delete this revision?

Delete this revision?

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