Simeis 147 (Barry Wilson)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Sh2-240

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Simeis 147

Link: https://barrywilson.smugmug.com

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Simeis 147

Link: https://barrywilson.smugmug.com

The data collection for this image started in 2019 and was finally finished this year as a stage one; stage two, if we undertake the challenge, will be to add OIII data. This is a 6 panel mosaic with its assembly helped greatly by using PI's PhotoMetric Mosaic script created by John Murphy: well done John for a great tool.

The target needs little introduction being both very extensive in apparent size and faint of course ;-) From Wikipedia: "Simeis 147, also known as the Spaghetti Nebula, SNR G180.0-01.7 or Sharpless 2-240, is a supernova remnant (SNR) in the Milky Way, straddling the border between the constellations Auriga and Taurus. Discovered in 1952 at the Crimean Astrophysical Observatory using a 25-inch Schmidt-Cassegrain telescope, it is difficult to observe due to its extremely low brightness. The nebulous area is fairly large with an almost spherical shell and filamentary structure.[2] The remnant has an apparent diameter of approximately 3 degrees, an estimated distance of approximately 3000 (±350) light-years, and an age of approximately 40,000 years.[3] It is believed that after its stellar explosion a rapidly spinning neutron star known as pulsar PSR J0538+2817 was left behind in the nebula core, emitting a strong radio signal.[4]"

Despite quite abundant data this target was harder to process than I anticipated, to realise the balance between a natural appearance and a discernible nebula without too much contrast. The final jpeg image is 27+Mb, so I have also uploaded an 80% jpeg for ease.

Data acquisition: Barry Wilson & Steve Milne

processing: Barry Wilson

Original
Final
B

B

Description: Rev B: 80% jpeg.

Uploaded: ...

Narrowband imaging
Deep Sky Mosaics
Sharpless2 Objects
Entre Encinas y Estrellas (e-EyE)

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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	4367775
PixInsight job	5G9I06SY7C0Y54CZ5F1T599ESL9QG3XG
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	05h40m37s.22
RA (top/left)	05h49m23s.64
RA (top/right)	05h31m38s.66
RA (bottom/right)	05h32m07s.93
RA (bottom/left)	05h49m18s.46

Dec (center)	+27°56′14″.9
Dec (top/left)	+29°42′43″.7
Dec (top/right)	+29°39′47″.3
Dec (bottom/right)	+26°07′47″.5
Dec (bottom/left)	+26°10′39″.7

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Simeis 147

Simeis 147

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Simeis 147

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