Galaxies Galore – Stephan’s Quintet and NGC 7331/C30

2021-12-08T09:21:55+00:0010 November 2021|Caldwell, Galaxy, News, NGC Autumn|

Stephan’s Quintet is to the left, consisting of 4 related galaxies and NGC 7320 which is a foreground galaxy. Their brightness’s range from +14.6 to +15.7.
NGC 7318B is colliding with gas in the group, producing a huge shock wave bigger than the Milky Way, spreading through the medium between the galaxies, heating the gas to millions of degrees, emitting X-rays.
A sixth galaxy, NGC 7320C appears to be connected by a tidal tail (just visible) to NGC 7319.

NGC 7331 or Caldwell 30 (to the right) is similar in size and structure to the Milky Way, 40M light years away. A discovery by William Herschel in 1784. It is the main body in the NGC 7331 Group, which contains unbarred spirals NGC 7335 and 7336, the barred spiral galaxy NGC 7337 and the elliptical galaxy NGC 7340. These other galaxies are all much further away (~300M ly), so not related to NGC 7331.

Object IDStephan’s Quintet and NGC 7331/C30
DetailsGalaxy Cluster
Pegasus
2021-11-03
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)15x180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

Double Cluster NGC 869 and NGC 884 / C14

2021-12-24T12:42:15+00:0016 November 2021|Caldwell, News, NGC Autumn, Open Cluster|

Revisiting an old friend. Two rich open clusters at similar distances from us of 7,500 light years.

Object IDDouble Cluster NGC 869 and NGC 884 / C14
DetailsOpen Clusters
Perseus
2021-11-12
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)20x180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

NGC 752 / C28 Open Cluster

2021-12-08T09:23:51+00:0010 November 2021|Caldwell, News, NGC Autumn, Open Cluster|

Looks ordinary but lots of interest in there if you dig a bit deeper – obviously not all associated with the cluster but just in the fov. Includes a fair number of galaxies, spectroscopic binaries, X ray sources, galaxy groups, radio sources, ir sources, stars with high proper motions. The cluster itself contains about 258 stars, mostly low mass in the main sequence or red giant stage. About 1300 ly away and just on the edge of naked eye visibility at mag. 5.7.

Object IDNGC 752 / C28
DetailsOpen Cluster
Andromeda
Mag.5.7
Size 75′
2021-11-01
Telescope250mm f4.8 Newtonian
MPCC
IDAS D3
CameraQHY168C @-15°C
Exposure(s)10x180s
d,f,b
CaptureNINA
ProcessingAPP, Photoshop

C5 The Hidden Galaxy

2021-04-14T13:59:46+00:0014 April 2021|Caldwell, Galaxy, News|

Another  go a this for the ASE Caldwell Project. A really tricky one this. Hidden in the dust from our own galaxy, this would actually be naked eye brightness if not obscured. From two sets of data but still challenging.

Object IDC4 NGC7023 Iris Nebula
DetailsMag. 9.1
Size 21.4′ x 20.9′
2021-04-11
Telescope250mm f4.8 Newtonian, MPCC
CameraQHY168C @-15°C
IDAS P2
Exposure(s)25 x 240s, 14x180s
darks, flats, bias
CaptureNINA
ProcessingAPP, Photoshop, Topaz Denoise AI

C4 NGC7023 Iris Nebula

2021-04-14T13:56:40+00:0014 April 2021|Caldwell, Nebula, News|

Another  for the ASE Caldwell Project. Horrible gradient to deal with but background is messed around with to bring out all the dust around it. Makes the rest of the background messy though.

Object IDC4 NGC7023 Iris Nebula
DetailsMag. 6.8
Size 18′ x 18′
2021-04-09
Telescope250mm f4.8 Newtonian, MPCC
CameraQHY168C @-15°C
IDAS P2
Exposure(s)25 x 240s
darks, flats, bias
CaptureNINA
ProcessingAPP, Photoshop, Topaz Denoise AI

C3 NGC 4236

2021-04-14T14:03:13+00:0014 April 2021|Caldwell, Galaxy, News|

Added more data to this one but still very tricky. More horrible gradients to deal with. The IDAS P2 LP filter is no longer doing it’s job with the change in LP sources round here. Have now bought the IDAS D3 to see if that is any better as it deals more with LED lighting.

Object IDC3 NGC 4236
Draco
DetailsMag. 10.5
Size 121′.9 × 7′.2
2021-04-12
Telescope250mm f4.8 Newtonian
MPCC
CameraQHY168C @-15°C
IDAS P2
Exposure(s)20x180s, 25x300s
10/50 gain/offset
darks, flats, bias
CaptureNINA
ProcessingAPP, Photoshop, Topaz DeNoise AI

Iris Nebula NGC 7023 / C4

2021-03-02T14:02:08+00:0023 September 2020|Caldwell, Nebula, News, NGC Summer|

Bringing out the all the dusty, dark material leaves me with a horrible background.

Object IDIris Nebula
NGC 7023 / C4
Details2020-09-19
Mag. 6.8
Telescope250mm f4.8 Newtonian, MPCC
CameraQHY168C @15°C
2/20 gain/offset
IDAS P2
Exposure(s)28x180s 10/50
darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop

The Iris Nebula is a bright reflection nebula in the constellation Cepheus. The designation NGC 7023 refers to the open cluster within the larger reflection nebula designated LBN 487. The nebula, which shines at magnitude +6.8, is illuminated by a magnitude +7.4 star designated SAO 19158.
Wikipedia

NGC188 (C1)

2020-04-07T21:23:16+00:007 April 2020|Caldwell, News, NGC Winter, Open Cluster|

Never noticed this one before. Very close to the pole so easy guiding as nothing moves very much round there.

Object IDNGC188, Caldwell 1
Open Cluster, Cepheus
Mag. 10
Size 11′
Details2020-04-06 22:42 UT
Telescope250mm f4.8 OO Newtonian
CameraATIK 460EX @-15C
Exposure(s)3x180s 1×1 TR, 2x180s 1×1 TG, TB
Darks, flats, bias
CaptureAPT
ProcessingAPP, Photoshop

Cygnus Wall NGC 700 (Caldwell 20)

2019-09-21T16:27:20+00:0021 September 2019|Caldwell, Narrowband, Nebula, News, NGC Summer|

Part of the North America nebula – the Central America part – seems to be known as the Cygnus Wall. Can only fit a small part of this object in my FOV.

Object IDNGC 7000, C20
DetailsMag. 4
Size: 120′ x 100′
Telescope250mm f4.8 Newtonian
CameraAtik 460EX, Baader filters
-15C
Exposure(s)10x300s ea in Ha and OIII
CaptureAPT
ProcessingAPP, Photoshop
Mapped HOO and moved to the blue end

Cave Nebula Sh2-155 / Caldwell 9

2019-09-21T16:29:23+00:009 September 2019|Caldwell, Narrowband, Nebula, News, NGC Summer|

Sh2-155 is a diffuse nebula in the constellation Cepheus, within a larger nebula complex containing emission, reflection, and dark nebulosity. It is widely known as the Cave Nebula. Sh2 designation because it’s part of the Sharpless Catalog (1959) of 312 HII regions. About 2400 light years from Earth and a stellar nursery.

Narrowband filters really do cut through the murky, light polluted skies of Edinburgh so well. Obviously false colour, has to be for narrowband, but can’t decide which is the best so two different tone mappings: SII Ha OIII -> RGB and Ha OIII SII

Object IDCave Nebula
Sh2-155 / C9
DetailsCepheus
Mag. 7.7, 50′ x 30′
Telescope250mm f4.8 Newtonian
CameraAtik 460EX
Exposure(s)10 x 180s each Ha OIII SII 2×2
CaptureAPT
ProcessingDSS, Nebulosity, Photoshop

Iris Nebula NGC 7023 / Caldwell 4

2019-08-29T12:59:19+00:0029 August 2019|Caldwell, Nebula, News, NGC Summer|

Been meaning to do this one for ages. Not easy because the background gas and dust can be easily lost in the light pollution and noise.

“The Iris Nebula, also known as NGC 7023 and Caldwell 4, is a bright reflection nebula and Caldwell object in the constellation Cepheus. NGC 7023 is actually the cluster within the nebula, LBN 487, and the nebula is lit by a magnitude +6.8 star, SAO 19158.”
Wikipedia

Object IDIris Nebula
NGC 7023 / C4
DetailsCepheus
Mag. 6.8, 18′ x 18′
Telescope250mm f4.8 Newtonian
CameraAtik 460EX
Exposure(s)10 x 180s each RGB 1×1
CaptureAPT
ProcessingNebulosity, Photoshop

Cocoon nebula IC5146 / Caldwell 19 RGB

2019-08-29T12:55:55+00:0028 August 2019|Caldwell, Nebula, News, NGC Summer|

“IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula.”
Wikipedia

Object IDCocoon Nebula
IC 5146 / C19
DetailsCygnus
Mag. 7.2, 12′
Telescope250mm f4.8 Newtonian
CameraAtik 460EX
Exposure(s)9 or 10 x 180s each RGB 1×1
CaptureAPT
ProcessingNebulosity, Photoshop

NGC 6888 / Caldwell 27 Crescent Nebula SHO

2019-09-21T16:29:35+00:0028 August 2019|Caldwell, Narrowband, Nebula, News, NGC Summer|

A new one for me

Object IDNGC 6888
Crescent Nebula
DetailsCygnus
Mag. 7.4, 18′ x 12′
Telescope250mm f4.8 Newtonian
CameraAtik 460EX
Exposure(s)7 x 300s each Ha, OIII, SII
CaptureAPT
ProcessingDSS, Nebulosity, Photoshop
Mapped SII, Ha, OIII -> RGB

Cygnus Wall – red channel only

2019-08-29T12:07:54+00:0023 July 2019|Caldwell, Nebula, News, NGC Summer|

After gathering HOYS-CAPS data thought I’d give this a quick go in red channel only.

Object IDCygnus Wall
Details“Mexico and Central American” part of North America Nebula
Telescope250mm f4.8 Newtonian
CameraAtik 460EX
IDAS P2 LP filter
8x180s 2×2, darks, bias, flats
-11C
CaptureAPT
ProcessingNebulosity, Photoshop

NGC4565 / Caldwell 38 Spindle Galaxy

2019-04-01T16:19:57+00:001 April 2019|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 IDNGC 4565, Caldwell 38 Spindle Galaxy
Details2019-03-31
Telescope203mm RC8 f8
CameraAtik 460Ex @-20C
Badder RGB filters
IDAS P2 LP filter
Exposure(s)10x240s 2×2 RGB
Darks
CaptureAPT
ProcessingNebulosity, Photoshop

Bubble nebula project 2 (NGC 7635)

2018-10-09T13:00:28+00:0024 September 2018|Caldwell, Nebula, News, NGC Autumn|

Added 18 frames of Ha. Much more detail and less noise.

Object IDNGC 7635 Bubble nebula (C11)
Mag. 10, Size 15’x8′
H II region emission nebula
Cassiopeia
Details2018-09-23 21:15-23:07 UT
Bright moonlight
Telescope200mm f5 Newtonian, MPCC
IDAS P2 LPR filter
Guided
CameraAtik 460EX, Baader 7nm Ha filter
Exposure(s)18 x 300s
darks, flats
CaptureAPT
ProcessingNebulosity 4, Photoshop

I did take some RGB colour but as you can see below there is a huge dust mark in it. Normally not a problem as flats will remove it. But when I went to create flats, the dust had disappeared so very difficult to remove. Unless it’s not dust but an out of focus reflection of the bright star? If it is I’ve never seen anything like it in my images before.