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Messier 33 M33 NGC598 Triangulum

astrophotography ccd CMOS dslr dso imaging Orion refractor
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#1 rekokich

rekokich

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Posted 22 January 2021 - 08:16 PM

Messier 33  M33  NGC598 Triangulum

M33 is a bright spiral galaxy, the third largest member of the Local Group, thought to be a satellite of the much larger Andromeda galaxy. It was first documented by Hodierna before 1654, then rediscovered by Messier in 1764. In 1850 Lord Rosse identified it as a "spiral nebula". In 1926 Hubble proved it to be an independent galactic system based on Cepheid variable star distance estimates. The galaxy is approximately 2.9 million LY distant, 60,000 LY in diameter, and contains about 40 billion stars. With apparent magnitude of 5.7 it is the most distant object visible under dark skies to the naked eye. The galaxy contains several prominent emission nebulae which have separate designations. The largest is NGC604, the red Ha region northeast of the galaxy core, which is 1,500 LY in diameter. Another one is the smaller NGC595 west of the galaxy core. The galactic nucleus contains an ultra-luminous X-ray source  (ULX) thought to be associated with an intermediate-mass black hole of about 3,000 solar masses. M33 is connected to the Andromeda galaxy with a delicate stream of hydrogen gas and stars suggesting tidal interactions in the remote past. Both galaxies are on a course for collision with the Milky Way in about 4 billion years.

The attached image is reprocessed data. It was taken with the TSAPO100Q astrograph (100x580mm), Celestron AVX mount, unmodified Canon 600D camera, Astronomik CLS-CCD filter, and Orion 60mm f4 SSAGpro autoguider.

The image is a stack of 26 x 240 sec exposures, iso 800, processed with 30 dark and 30 bias frames, 50% crop. Compared with the DSS2 survey, limiting magnitude is better than 18.2.

Software used was PHD2, DSS, XnView, Starnet++, and StarTools v 1.3 and 1.7.

Thank you for looking.

 

 

ZE1LGS.jpg


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#2 rekokich

rekokich

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Posted 22 January 2021 - 08:17 PM

ZE2LGS.jpg


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