Galaxy

/Galaxy

NGC4565 / Caldwell 38 Spindle Galaxy

By |2019-04-01T16:19:57+00:001 April 2019|Categories: Caldwell, Galaxy, News|

Processed 3 different ways – give different results, not sure which I like best. Still too noisy – need many more exposures.
Interesting edge-on spiral galaxy in Coma Berenices, surprisingly large (14.9′ x 2′) but faint (9.60 but surface brightness 13.3). It is actually intrinsically more luminous than the Andromeda Galaxy. First seen by William Herschel in 1785. Also visible lower right is NGC 4562.

Object ID NGC 4565, Caldwell 38 Spindle Galaxy
Details 2019-03-31
Telescope 203mm RC8 f8
Camera Atik 460Ex @-20C
Badder RGB filters
IDAS P2 LP filter
Exposure(s) 10x240s 2×2 RGB
Darks
Capture APT
Processing Nebulosity, Photoshop
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M63 Sunflower Galaxy

By |2019-04-01T15:45:24+00:001 April 2019|Categories: Galaxy, News|

Pretty noisy, bad gradients and difficult to process.
RGB combined with L channel from 2015-04-20

Object ID M63 Sunflower Galaxy
Details 2019-03-24
Telescope 203mm RC8 f8
Camera Atik 460Ex @-20C
Badder RGB filters
IDAS P2 LP filter
Exposure(s) 10x180s 2×2 RGB
Darks
Capture APT
Processing Nebulosity, Photoshop
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M82 RGB

By |2019-02-12T16:41:19+00:0012 February 2019|Categories: Galaxy, M61-90, News|

Just a few frames before clouds so a bit grainy.

Object ID M82 Cigar galaxy
Ursa Major
Details 2019-02-09
Telescope 250mm f4.8 Newtonian
IDAS P2 filter
Camera Atik 460EX, Baader RGB
Exposure(s) 4 x 180s each filter
darks
Capture APT
Processing Nebulosity, Photoshop
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Supernova 2018 ivc in M77

By |2018-12-06T21:49:01+00:004 December 2018|Categories: Galaxy, M61-90, News, Other|

First supernova for me.

Object ID SN 2018 ivc in M77
Type II supernova
Details 2018-12-03 22:10 – 22:39 UT
Telescope 250mm f4.8 Newtonian, MPCC, IDAS P2
Camera Atik 460EX at -20C
Exposure(s) L 10x90s 1×1
Capture APT
Processing Nebulosity, Photoshop
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M81 LRGB

By |2018-11-06T15:50:08+00:006 November 2018|Categories: Galaxy, M61-90, News|

Lots of gradients and stray light from somewhere coming in. Hard to process and as a result have lost the fainter outer arms.

Object ID M81 Bode’s galaxy
Mag. 6.94, Size 26.9′ x 14.1′
Ursa Major
Details 2018-11-1 21:59 – 22:47 UT
Telescope 250mm f4.8 Newtonian, MPCC
IDAS P2 LPR filter
Guided
Camera Atik 460EX, Baader LRGB  filters
Exposure(s) L 20x120s 1×1, RGB 10x60s 2×2 each
darks, flats were no good
Capture APT
Processing Nebulosity 4, Photoshop
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M31 first test of old 10 inch Newt

By |2018-11-06T15:51:38+00:0012 October 2018|Categories: Galaxy, M31-60, News|

First test of the old 10 inch Newtonian I picked up. Focuser and dovetail were a mess, but with some work it could be good. Optically pretty sound though.

Object ID M31 Andromeda galaxy
Mag. 3.44, Size 3.1 x 1 degrees
Andromeda
Details 2018-10-11 22:26 – 23:49 UT
Telescope 250mm f4.8 Newtonian, MPCC
IDAS P2 LPR filter
Guided
Camera Atik 460EX, Baader LRGB  filters
Exposure(s) L 16x120s 1×1, RGB 10x60s 2×2 each
darks
Capture APT
Processing Nebulosity 4, Photoshop
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NGC 3628

By |2017-03-28T09:11:07+00:0028 March 2017|Categories: Galaxy, News, NGC Spring|

Unbarred spiral galaxy, Leo
Mag 10.2 Size 15′ × 3′.6
2017-03-21
200mm f8 RC
Piggyback guiding with 70mm f/7 refractor
L 22×240s 2×2, RGB 11×120s 4×4 Darks Bias Flats
Atik 460EX (-24C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

Poor transparency resulting in lots of light pollution and gradients. Also focusing and guiding was not the best.

NGC 3628, also known as the Hamburger Galaxy or Sarah’s Galaxy, is an unbarred spiral galaxy about 35 million light-years away in the constellation Leo. It was discovered by William Herschel in 1784. It has an approximately 300,000 light-years long tidal tail. Along with M65 and M66, NGC 3628 forms the Leo Triplet, a small group of galaxies. Its most conspicuous feature is the broad and obscuring band of dust located along the outer edge of its spiral arms, effectively transecting the galaxy to the view from Earth.

Due to the presence of an x-shaped bulge, visible in multiple wavelengths, it has been argued that NGC 3628 is instead a barred spiral galaxy with the bar seen end-on Simulations have shown that bars often form in disk galaxies during interactions and mergers, and NGC 3628 is known to be interacting with its two large neighbors.

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M101 (NGC 5457) Pinwheel Galaxy

By |2017-03-27T13:03:00+00:0027 March 2017|Categories: Galaxy, M91+, News|

Galaxy, Ursa Major
Mag 7.86 Size 28?.8 × 26?.9
2017-03-25
200mm f8 RC
Piggyback guiding with 70mm f/7 refractor
L 20×240s 2×2, RGB 10×120s 4×4 Darks Bias Flats
Atik 460EX (-24C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

Horrible gradients again. I suspect collimation and camera alignment need some work.

M101 is a large galaxy comparable in size to the Milky Way. With a diameter of 170,000 light-years it is roughly equal the size of the Milky Way. It has a disk mass on the order of 100 billion solar masses, along with a small central bulge of about 3 billion solar masses.

M101 is noted for its high population of H II regions, many of which are very large and bright. H II regions usually accompany the enormous clouds of high density molecular hydrogen gas contracting under their own gravitational force where stars form. H II regions are ionized by large numbers of extremely bright and hot young stars; those in M101 are capable of creating hot superbubbles. In a 1990 study, 1264 H II regions were cataloged in the galaxy. Three are prominent enough to receive New General Catalogue numbers – NGC 5461, NGC 5462, and NGC 5471.

M101 is asymmetrical due to the tidal forces from interactions with its companion galaxies. These gravitational interactions compress interstellar hydrogen gas, which then triggers strong star formation activity in M101’s spiral arms that can be detected in ultraviolet images.

In 2001, the x-ray source P98, located in M101, was identified as an ultra-luminous X-ray source – a source more powerful than any single star but less powerful than a whole galaxy – using the Chandra X-ray Observatory. It received the designation M101 ULX-1. In 2005, Hubble and XMM-Newton observations showed the presence of an optical counterpart, strongly indicating that M101 ULX-1 is an x-ray binary. Further observations showed that the system deviated from expected models – the black hole is just 20 to 30 solar masses, and consumes material (including captured stellar wind) at a higher rate than theory suggests.

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