M1 Crab Nebula (Matthias)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: M 1 · NGC 1952

Powered byPixInsight

M1 Crab Nebula

Powered byPixInsight

M1 Crab Nebula

This is 69x30s using long focal length and AltAz mount. It is my first SHO-forax colored image. (my 2nd color image over all)
The Crab Nebula's brain like structure is really interesting, however the main reason for choosing it as a target that night was that I was looking for an DSO that would be ideally positioned in the sky to accommodate my equipment.
As most people know AltAz mounts introduce quickly a lot of field rotation. This effect is independent from the quality of your tracking. It is limiting your exposure time to about 30s highest. (At least it doesn't matter how long your focal length is, since rotation is rotation.) On top of this limitation I can't go higherthen 70 degrees with the AltAz, because the camera will collide with the mount.
So what I did was using Stellarium to locate a good candidate: I set it to the day and time I was planning to capture, locked on a target and switched the time one hour forward and backwards. This keeps the target in the center of the view and you can see how much the background stars will rotate.

On February 13th from 22:30-23:30 Crab Nebula was below 70 degree and only very little rotating from my observation site. That gave me time for 30 frames per filter (LHSO). There was only little wind that night and I could keep most of my images.
I didn't shoot RGB for the stars since my time window seemed too narrow. The stars are processed R: Ha / G: 0.2*Ha + 0.8*Oiii / B: Oiii

(I realized during post processing that I didn't really need L.)

SoCal 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	Basic success
Started	...
Astrometry.net job	7208981
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

Image Index:

Contribution Index (beta):

M1 Crab Nebula

M1 Crab Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

M1 Crab Nebula

M1 Crab Nebula

Equipment

Acquisition details

Description

Comments

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?

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