Witch Head Nebula (Stephen Migol)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: HD32622 · HD32737 · HD32841 · HD32925 · HD33158 · IC 2118 · NGC 1909 · Witch Head nebula · the Witch Head Nebula

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Witch Head Nebula

Link: http://www.flickr.com/photos/smigol/8455629140

Powered byPixInsight

Witch Head Nebula

Link: http://www.flickr.com/photos/smigol/8455629140

A work in progress, this is the Witch Head Nebula (IC 2118) near Rigel. Seen over two nights of data collection at Montebello OSP.

I'm trying some different ways of gathering data to see what I can do. These are 20 minute subs at 100 ISO. 24 subs made up this stack for about 8 hours of integration.

Still calibrating with Maxim and stacking with DSS before going to PI.

What I've found is that for the setup, the temperature range doesn't seem to matter as much any more. Using a "set point" for the cooler at 0C seems to give a flat response for noise across the session. Thus, there's not as much need to keep as large of a library of darks. This is a good thing. Also the texture of the noise changed, so I'll have to figure out new settings in Atrous wavelet processing.

There are still flexure issues with the camera. I think I know where the problem is. I'll try a fix tomorrow and test it out this weekend.

Here is the plate solve from PI:

Referentiation Matrix (Gnomonic projection = Matrix * Coords[x,y]):

+0.000028253472 -0.000530158975 +0.507957495766

+0.000530163848 +0.000028685662 -0.939069255758

+0.000000000000 +0.000000000000 +1.000000000000

Resolution ........ 1.911 arcsec/pix

Rotation .......... 93.073 deg

Focal ............. 655.06 mm

Pixel size ........ 6.07 um

Field of view ..... 1d 49' 14.0" x 1d 6' 51.9"

Image center ...... RA: 05 05 55.880 Dec: -06 47 38.51

Image bounds:

top-left ....... RA: 05 07 58.890 Dec: -07 43 57.76

top-right ...... RA: 05 08 21.797 Dec: -05 54 53.67

bottom-left .... RA: 05 03 29.430 Dec: -07 40 20.61

bottom-right ... RA: 05 03 53.350 Dec: -05 51 17.32

Please note: The following tables are updated every 24 hours.

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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
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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
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Star trails
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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	6903528
PixInsight job	6ETDDE3LXJNKTILFR05LHZPL203KGC35
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h05m55s.97
RA (top/left)	05h07m58s.80
RA (top/right)	05h08m21s.71
RA (bottom/right)	05h03m53s.76
RA (bottom/left)	05h03m29s.74

Dec (center)	-06°47′40″.9
Dec (top/left)	-07°43′56″.6
Dec (top/right)	-05°54′59″.9
Dec (bottom/right)	-05°51′26″.10
Dec (bottom/left)	-07°40′19″.1

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Witch Head Nebula

Witch Head Nebula

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Image Index:

Contribution Index (beta):

Witch Head Nebula

Witch Head Nebula

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