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Celestial hemisphere:  Northern  ·  Constellation: Taurus (Tau)  ·  Contains:  The star 125Tau  ·  The star 132Tau  ·  The star 136Tau
sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022, Stefano Ciapetti
sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022
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sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022

sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022, Stefano Ciapetti
sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022
Powered byPixInsight

sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022

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Description

This image is the sum of 1076 60 secs unguided subs taken during the nights of 1st, 5th and 8th of February. As the FL is very short (70) I have not used any recentiring script for a few nights. But as some troubles happened during meridian flip, I had to use the recentering script for the aquisition of the 8th. It worked perfectly.
Subject is very weak and it's really at the limit of my bortle 8 sky. But something is still visible.
Imaging train was Canon 70-200 F4 lens (at 70 F4 FL), Asi 533 camera, Optolong L-Extreme filter and Ioptron Smart Eq pro mount.

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 by Grigory Shajn and his team using a Schmidt camera and a narrowband filter that was close to the Hydrogen Alpha transmission line. It is difficult to observe due to its extremely low brightness. This discovery was part of a survey conducted between 1945 and 1955 most likely using captured German equipment, as the observatory was practically destroyed during WWII. The Schmidt camera had a field of view of 175'. Many previously unknown hydrogen nebula were discovered this way, which did not appear in regular photographs.

The nebulous area is fairly large with an almost spherical shell and filamentary structure. 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.

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. (Wikipedia)

Comments

Revisions

  • Final
    sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022, Stefano Ciapetti
    Original
  • sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022, Stefano Ciapetti
    B

B

Description: During the aquisition of this subject I had several issue with my mount. During the nights of 28th and 29th of January my mount had some trouble and lost part of the object. Usually I start aquisition and then go to bed. After checking frames, I found out my mount troubles. Version B is the sum of ALL the nights and include only the interstection that was present in each frame. Total aquisition time in this case is 28 hours and 50 minutes. Object is much more visible, even is not so clear. But for my bortle 8 sky it's not a bad result.

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sh2-240 - 1076 60 secs unguided subs taken from my bortle 8 sky on the 1st, 5th and 8th February 2022, Stefano Ciapetti

In these public groups

Imagers of Italy
Suburban Astrophotography
Low-Cost Astrophotography
Short exposures DSO
ASI533MC Pro
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