New General Catalog Object Analysis
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By Stargazer33
Taken on the night of 12 September.
NGC6826 - The Blinking Nebula.
This on Wiki:
NGC6826 is a planetary nebula located in the constellation Cygnus. It is commonly referred to as the "blinking planetary", although many other nebulae exhibit such "blinking". When viewed through a small telescope, the brightness of the central star overwhelms the eye when viewed directly, obscuring the surrounding nebula. However, it can be viewed well using averted vision, which causes it to "blink" in and out of view as the observer's eye wanders. A distinctive feature of this nebula are the two bright patches on either side, which are known as Fast Low-Ionization Emission Regions, or FLIERS. They appear to be relatively young, moving outwards at supersonic speeds.
Right ascension: 19 h 44 m 48.2 s
Declination: +50° 31′ 30.3″
Distance: ~2000 ly
Apparent magnitude (V): 8.8
Apparent dimensions (V): 27″ × 24″
Constellation: Cygnus
Radius: 0.22 x 0.20 ly
Designations: HD 186924, SAO 31951, Caldwell 15
Equipment:
Imaging: C9.25; CGEM (diy hypertuned); ASI385MC; Baader neodymium filter; Astro Photography Tool
Guiding: Travelscope 70; SSAG; PHD2
Processing: DSS; Photoshop CS4 Extended
99 x 20" lights, of which 63 were stacked; 50 x darks; 50x bias; 50 x flats
Looks like I'm going to have to have another go at my collimation. Very happy with this even so, as it's the first serious imaging I've done for sooo long! A lot more data is required to bring out the detail in the nebula.
Comments/suggestions welcome.
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By stevewanstall
Celestron 9.25 at f6.3, SW EQ6R pro, Canon 550 D modded
The galaxy group Hickson 44 in Leo. This is based on 29 x 240 s, plus bias and flats.
Hickson 44 in Leo:
There are some other galaxies near by, some of which are names in this overlay from Astrometry.net:
Overlay from Astrometry, naming the other objects:
The main ones are NGC 3190, NGC 3185, NGC 3187 and NGC 3193. NGC 3190 has a well defined dust lane. NGC 3187 is a barred spiral galaxy with two arms. NGC 3193 is an elliptical galaxy.
The light captured by my camera last night left these galaxies just after the extinction event killed the dinosaurs on Earth.
From APOD: Galaxies, like stars, frequently form groups. A group of galaxies is a system containing more than two galaxies but less than the tens or hundreds typically found in a cluster of galaxies. A most notable example is the Local Group of Galaxies, which houses over 30 galaxies including our Milky Way, Andromeda, and the Magellanic Clouds. Pictured above is nearby compact group Hickson 44. This group is located about 60 million light-years away toward the constellation of Leo. Also known as the NGC 3190 Group, Hickson 44 contains several bright spiral galaxies and one bright elliptical galaxy on the upper right. The bright source on the upper left is a foreground star. Many galaxies in Hickson 44 and other compact groups are either slowly merging or gravitationally pulling each other apart.
Abell 1367
This image is based on 19 x 300 s , plus flats and bias. It shows a LOT of galaxies, in a grouping called Abell 1367. In this image you are looking at part of one of the biggest structures in the Universe, the Great Wall.
Wikipedia:
The Leo Cluster (Abell 1367) is a galaxy cluster about 330 million light-years distant (z = 0.022) in the constellation Leo, with at least 70 major galaxies. The galaxy known as NGC 3842 is the brightest member of this cluster. Along with the Coma Cluster, it is one of the two major clusters comprising the Coma Supercluster, which in turn is part of the CfA2 Great Wall, which is hundreds of millions light years long and is one of the largest known structures in the universe.
The overlay from Astrometry gives some of the galaxies visible in the image.
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By MikeODay
The Great Barred Spiral Galaxy ( NGC 1365 ) in the Constellation Fornax
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( edit - star chart added )
The Great Barred Spiral Galaxy ( NGC 1365 ) - Chart ( please click/tap on image see larger and sharper version )
A full size ( 6200 x 4407px ) image can be downloaded from here.
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Details:
Below the equator, not seen from much of the Northern hemisphere, NGC 1365 passes very nearly directly overhead an observer situated near Cape Town, as Sir John Herschel was in November of 1837 when he discovered this “remarkable nebula” that is numbered 2552 in his book of observations from the Cape.
Not called a “nebula” now, of course, this striking object is one of the nearest and most studied examples of a barred spiral ( SB ) galaxy that also has an active galactic nuclei resulting in its designation as a Seyfert galaxy.
At around 60 M light years from Earth, NGC 1365 is still seen to occupy a relatively large area ( 12 by 6 arc minutes ) due to its great size; at some 200,000 light years or so across, NGC 1365 is nearly twice as wide as the Milky Way and considerably wider than both the Sculptor and Andromeda galaxies.
This High Dynamic Range ( HDR ) image is built up from multiple exposures ranging from 4 to 240 seconds with the aim of capturing the faint detail in the spiral arms of the galaxy whilst also retaining colour in the brightest star ( the orange-red 7th magnitude giant, HD 22425 ). Also, scattered throughout the image, and somewhat more difficult to see, are numerous and far more distant galaxies.
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Identification:
The Great Barred Spiral Galaxy
New General Catalogue - NGC 1365
General Catalogue - GC 731
John Herschel ( Cape of Good Hope ) # 2552 - Nov 28, 29 1837
Principal Galaxy Catlogue - PCG 13179
ESO 358-17
IRAS 03317-3618
RA (2000.0) 3h 33m 37.2 s
DEC (2000.0) -36 deg 8' 36.5"
10th magnitude Seyfert-type galaxy in the Fornaux cluster of galaxies
200 Kly diameter
60 Mly distance
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Capture Details:
Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ).
Corrector: ASA 2" Coma Corrector Quattro 1.175x.
Effective Focal Length / Aperture : 1375mm f4.7
Mount: Skywatcher EQ8
Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2
Camera:
Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)
Location:
Blue Mountains, Australia
Moderate light pollution ( pale green zone on darksitefinder.com map )
Capture ( 3, 7 & 8 Dec 2018 )
7 sets of sub-images with exposure duration for each set doubling ( 4s to 240s ) all at unity gain ( ISO 250).
140 x 240s + 10 each @ 4s to 120s
total around 9.7 hrs
Processing ( Pixinsight )
Calibration: master bias, master flat , master dark
Integration in 7 sets
HDR combination
Links:
500px.com/MikeODay
photo.net/photos/MikeODay
<a href="http://www.flickr.com/photos/mike-oday">www.flickr.com/photos/mike-oday</a>
Image Plate Solution
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Resolution ........ 0.586 arcsec/px ( full size image )
Rotation .......... -0.003 deg ( North is up )
Field of view ..... 58' 37" x 38' 55"
Image center ...... RA: 03 33 36 Dec: -36 08 27
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By MikeODay
The Cat's Paw Nebula ( NGC 6334 ) in Scorpius
updated ( slight tweak to colour balance, a little brighter and tad more contrast )
( please click / tap on image to see larger and sharper - a full size image can be seen here )
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original:
( please click / tap on image to see larger and sharper - a full size image can be seen here )
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Also known as the Bear Claw Nebula, NGC 6334 is an emission nebula near the scorpion's tail in the Scorpius constellation.
Image details:
Image centre ...... RA: 17 20 08.185 Dec: -35 52 30.91
Field of view ..... 57' 37.8" x 38' 51.8"
Rotation .......... 0.00 deg ( North is up )
Resolution ........ 0.586 arcsec/px
Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ).
Corrector: ASA 2" Coma Corrector Quattro 1.175x.
Effective Focal Length / Aperture : 1470mm f4.7
Mount: Skywatcher EQ8
Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2
Camera:
Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)
Location:
Blue Mountains, Australia
Moderate light pollution ( pale green zone on darksitefinder.com map )
Capture ( July 2018 )
6 sets of sub-images with exposure duration for each set doubling ( 4s to 240s ) all at ISO 250.
168 x 4 min frames plus ~10 frames each for the shorter exposures
Processing:
Calibration: bias, dark and flat
Integration in 8 sets
HDR combination
Pixinsight July 2018
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By MikeODay
Update: 3rd June
Re-processed to remove slight magenta tint caused by the non-uniform removal of light pollution by the DBE process ( it was being fooled by the very bright image centre ).
The globular star cluster Omega Centauri ( NGC 5139 ) in Centaurus ( please click / tap on image to see larger and sharper )
A full size image can be found here.
original below
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A newly captured ( May 2018 ) image of the great southern globular star cluster, Omega Centauri ( NGC 5139 )
Omega Centauri ( NGC 5139 ) in Centaurus - ( please click / tap image to see larger and sharper )
A full size ( ~ 6000 x 4000 ) image can be found here
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This image is an attempt to look deeply into the mighty Omega Centauri star cluster and, by using HDR techniques, record as many of its faint members as possible whilst capturing and bringing out the colours of the stars, including in the core.
Image details:
Resolution ........ 0.586 arcsec/px ( full size image )
Rotation .......... 0.00 deg ( up is North )
Focal ............. 1375.99 mm
Pixel size ........ 3.91 um
Field of view ..... 58' 20.9" x 38' 55.1"
Image center ...... RA: 13 26 45.065 Dec: -47 28 27.26
Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ).
Corrector: ASA 2" Coma Corrector Quattro 1.175x.
Effective Focal Length / Aperture : 1470mm f4.7
Mount: Skywatcher Eq8
Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2
Camera:
Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)\
Location:
Blue Mountains, Australia
Moderate light pollution ( pale green zone on darksitefinder.com map )
Capture ( May 2018 )
8 sets of sub-images with exposure duration for each set doubling ( 2s to 240s ) all at ISO 250.
Processing:
Calibration: master bias, master flat and master dark
Integration in 8 sets
HDR combination
Pixinsight May 2018
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