Nebula

Home/Nebula

M42 for 2019 narrowband

2019-01-29T21:36:10+00:0029 January 2019|M31-60, Nebula, News|

This year in narrowband. Two attempts at colour mapping.
Need to get rid of the MPCC with this telescope as the image is better without. Too much star trailing with.

Object IDM42 Orion Nebula
Details2019-01-22
Telescope250mm f4.8 Newtonian, MPCC
CameraAtik 460EX @-20C
Baader Ha, OIII, SII filters
Exposure(s)10x120s 2×2 each
Darks
CaptureAPT
ProcessingNebulosity, Photoshop
OHS, SHO colour mapping

B33 Horsehead in narrowband

2019-01-14T16:26:53+00:0014 January 2019|Dark nebula, Narrowband, Nebula, News, NGC Winter|

First real narrowband image. Strange reflections of the primary, secondary and spider in Ha and OIII images, as well as flats.
Mappings were OHS and HOS. SII didn’t add much to either image but object is strong in Ha and OIII.

Object IDB33 in IC343
Details2019-01-13
Telescope250mm f4.8 Newtonian
MPCC
Guided PHD2
CameraAtik 460EX
Baader Ha, OIII, SII filters
Exposure(s)15x200s 2×2 each filter
15 each of darks, flats, bias
CaptureAPT
ProcessingNebulosity and Photoshop
Colour mapping:
OHS: OIII, Ha, SII
HOS: Ha, OIII, SII.

NGC 281 (Pacman nebula) in RGB

2018-11-06T15:50:53+00:0011 October 2018|Nebula, News, NGC Autumn|

Few things wrong. Poor seeing, bloated stars, gusty wind,…

Object IDNGC 281 Pacman nebula (IC11)
Mag. 10, Size 35′
H II region emission nebula
Contains open cluster NGC 1590
Cassiopeia
Details2018-10-10
Poor seeing and transparency
Telescope200mm f5 Newtonian, MPCC
IDAS P2 LPR filter
Guided
CameraAtik 460EX, Baader RGB  filters
Exposure(s)15 x 120s each colour
darks, flats
CaptureAPT
ProcessingNebulosity 4, Photoshop

NGC 281 (Pacman nebula) in Ha

2018-10-11T15:16:22+00:008 October 2018|Nebula, News, NGC Autumn|

Best night for ages.

Object IDNGC 281 Pacman nebula (IC11)
Mag. 10, Size 35′
H II region emission nebula
Contains open cluster NGC 1590
Cassiopeia
Details2018-10-06 22:03-23:41 UT
No moonlight and good transparency
Telescope200mm f5 Newtonian, MPCC
IDAS P2 LPR filter
Guided
CameraAtik 460EX, Baader 7nm Ha filter
Exposure(s)19 x 300s
darks, flats
CaptureAPT
ProcessingNebulosity 4, Photoshop

NGC 281, IC 11 or Sh2-184 is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way’s Perseus Spiral Arm. This 20×30 arcmin sized nebulosity is also associated with open cluster IC 1590, several Bok globules and the multiple star, B 1. It collectively forms Sh2-184,[3] spanning over a larger area of 40 arcmin.[4] A recent distance from radio parallaxes of water masers at 22 GHz made during 2014 is estimated it lies 2.82±0.20 kpc. (9200 ly.) from us.[5] Colloquially, NGC 281 is also known as the Pacman Nebula for its resemblance to the video game character.

E. E. Barnard discovered this nebula in August 1883, who described it as “a large faint nebula, very diffuse.” Multiple star ‘B 1’ or β 1 was later discovered by S. W. Burnham, whose bright component is identified as the highly luminous O6 spectral class star, HD 5005 or HIP 4121. It consists of an 8th-magnitude primary with four companions at distances between 1.4 and 15.7 arcsec. There has been no appreciable change in this quintuple system since the first measures were made in 1875.
Wikipedia

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.

Bubble nebula project (NGC 7635)

2018-09-23T16:38:33+00:0023 September 2018|Caldwell, Nebula, News, NGC Autumn|

One of my favourite objects. Trying to do this over a series of nights. Ha first of all then add colour channels. Only 2x300s exposures in Ha so far.

Object IDNGC 7635 Bubble nebula (C11)
Mag. 10, Size 15’x8′
H II region emission nebula
Cassiopeia
Details2018-09-22 21:40-21:45 UT
Bright moonlight
Telescope200mm f5 Newtonian, MPCC
IDAS P2 LPR filter
Guided
CameraAtik 460EX, Baader 7nm Ha filter
Exposure(s)2 x 300s
darks, flats
CaptureAPT
ProcessingNebulosity 4, Photoshop

Orion and Running Man nebulae

2018-02-14T15:46:06+00:0014 February 2018|M31-60, Nebula, News, NGC Winter|

Red channel has poor focus.

Object IDM42,43 and Sh2-279
DetailsNebulae, Orion
Mag. 4 Size 65’x60′
TelescopeC80ED @ f5.6 (x0.75 reducer)
CameraAtik 460EX (-15C) and SX filter wheel
IDAS P2 LPR filter
Exposure(s)L 10x60s 1×1, RGB 10x60s each 2×2
darks, no flats or bias
CaptureAPT, finder guiding with PHD2
ProcessingStacked in Nebulosity, processed in Photoshop and Lightroom

Rosette Nebula C49 and NGC 2244

2018-02-14T15:45:16+00:0014 February 2018|Caldwell, Nebula, News, NGC Winter|

Had to discard the L channel as underexposed.

Object IDC49 Rosette Nebula and NGC 2244
DetailsNebula and Open Cluster, Monoceros
Mag. 9 Size 1.3 degrees
TelescopeC80ED @ f5.6 (x0.75 reducer)
CameraAtik 460EX (-15C) and SX filter wheel
IDAS P2 LPR filter
Exposure(s)RGB 10x60s each 2×2
darks, no flats or bias
CaptureAPT, finder guiding with PHD2
ProcessingStacked in Nebulosity, processed in Photoshop and Lightroom

Horsehead, Flame and Alnitak

2018-02-12T11:58:58+00:0012 February 2018|Nebula, News, NGC Winter|

First for a while. Far too few subs and poor focusing. Big reflection of Alnitak too.

Processed (very harshly to get anything out of it) in Nebulosity 3, Photoshop and Lightroom. Noise reduction very heavily used!

Object IDNGC 2024 Flame nebula, Barnard 22 Horsehead nebula
DetailsNebula and Dark Nebula, Orion
Mag. 2 Size 30′, 8’x6′
TelescopeC80ED @ f5.6 (x0.75 reducer)
CameraAtik 460EX (-15C) and SX filter wheel
IDAS P2 LPR filter
Exposure(s)L 2x60s 1×1, RGB 2x60s each 2×2
darks, no flats or bias
CaptureAPT unguided
ProcessingStacked in Nebulosity, processed in Photoshop and Lightroom

Cone Nebula and Christmas Tree Cluster

2017-02-01T09:35:27+00:0030 January 2017|Nebula, News, NGC Winter, Open Cluster|

NGC 2264
Star forming nebula and Open cluster, Monoceros
Mag 3.9, size 20′
2017-01-29
200mm f8 RC at f6 (Revelation x0.75 reducer)
Piggyback guiding with 70mm f/7 refractor
L 5×240s 2×2, RGB 5×120s 4×4 Darks Bias Flats
Atik 460EX (-25C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

Bad planning in that the object went behind the observatory roof after only 5 sets of exposures. Not great but better than expected though.

Good quality flats make such a huge difference. Much easier to process, especially when using the reducer.

M42 for 2017

2017-01-02T12:55:02+00:002 January 2017|M31-60, Nebula, News|

Got to do it every year – this is the 2017 version. Also trying out my new Revelation x0.75 reducer for the RC8. Seems to work very well for a very reasonable price £69. Spacing should be 80mm +/- 5mm. I managed to get 75mm with my filter wheel and 460EX.

Orion Nebula, Diffuse Emission Nebula, Orion
Mag 4.0 Size 85’x60′
2017-01-01
200mm f8 RC at f6 (new Revelation x0.75 reducer)
Piggyback guiding with new 70mm f/7 achromatic refractor
L 15×60s 2×2, RGB 15×30s 4×4 BPM
Atik 460EX (-25C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

NGC1977 Running Man Nebula

2017-01-31T10:52:42+00:0026 November 2016|Nebula, News, NGC Winter|

Another attempt at this with the CCD this time. Images get progressively worse through the night as equipment mists up despite attempts to stop it. Flats were useless and made it all worse so a little vignetting.

2016-11-25
200mm f5 Newtonian, piggyback guiding C80ED
L 9×180 1×1, RGB 9×120 2×2
BPM
Atik 460EX (-25C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

IC 5146 Cocoon Nebula (C19) #2

2015-10-05T12:50:33+00:0011 September 2015|Caldwell, Nebula, News, NGC Summer|

Reflection/emission nebula, Cygnus
Caldwell 19, Finest NGC 99b, SAC110 45
Mag. 10, Size 12’x12′
2015-09-10 / 2015-10-01
200mm f8 RC, piggyback guiding C80ED
L 10×300 2×2, RGB 8×240 3×3
BPM no flats
Atik 460EX (-10C), LRGB filters, IDAS P2 LPR filter
Captured in APT, Processed in Nebulosity3, PS CC, LightRoom

Second attempt at this with the 460EX. 2 nights of data. Meridian flip reduced time.
This is the first time I’ve tried final processing and touch up in Adobe LightRoom.

NGC 7635 Bubble Nebula (C11) with 460EX

2017-01-31T10:52:42+00:0012 October 2014|Caldwell, Nebula, News, NGC Autumn|

First real LRGB image with the new 460EX. Still need to improve processing. I have some Ha from previous night to add in too but not sure how to do it.

Emission nebula, Cassiopeia
Mag. 10 Size 15’x8′
2014-10-12
200mm f5 newtonian, piggyback guiding C80ED
L: 5×180 (1×1) RGB 5×120 (2×2) each
Atik 460EX (-15C), LRGB filters, MPCC, Lumicon DS filter
Captured in APT, Processed in Nebulosity, PS CC

Cocoon from multiple dates and telescopes

2017-01-31T10:52:42+00:006 September 2014|Caldwell, Nebula, News, NGC Summer|

First successful attempt at using different focal ratios. Not bad!
Using subs from 200mm f/5 newtonian and 2 different sessions with the RC8.

200mm f/5 newtonian 10x180s 4x240s, darks, flats,  ISO 800 2008-08-19
200mm f/8 RC 2×240, darks, flats ISO 1600 2012-09-16
200mm f/8 RC 10×180, 20×240, darks, ISO 1600 2014-08-26

And this is what the stack looked like:

overlap

IC 5146 Cocoon Nebula (C19)

2014-09-06T14:04:31+00:0014 August 2012|Caldwell, Nebula, NGC Summer|

Reflection/emission nebula, Cygnus
Caldwell 19, Finest NGC 99b, SAC110 45
Mag. 10, Size 12’x12′
2012-08-08
200mm f5 Newtonian MPCC Guided
Canon EOS 350D Modded, Astronomik CLS
10x180s 4x240s, darks, flats,  ISO 800
Captured in APT 1.93
Processed in Nebulosity and PS CS5
Need more subs as sky lost transparency.

NGC 1499 California Nebula

2013-08-06T21:59:14+00:0016 February 2012|Nebula, News, NGC Autumn|

Diffuse Nebula, Perseus
Mag ? Size 145’x40′
2012-02-15
200mm f5 Newtonian MPCC Guided
Canon EOS 350D modded, Astronomik CLS
16x120s, darks, flats, ISO 800
Captured in APT, Processed in Nebulosity, PS CS5
This is only about half of this extended nebula. Not very transparent skies so couldn’t use longer subs.

NGC 2237 Rosette Nebula (NGC 2244 / C49)

2015-12-11T15:52:55+00:0023 January 2012|Caldwell, Finest NGC, Nebula, News, NGC Winter, Open Cluster|

C49 Emission Nebula, Monoceros
Mag 9.0 Size 1.3°
NGC 2244, C50 Open Cluster inside nebula
Mag 4.8 Size 24′
2012-01-23
200mm f5 Newtonian MPCC Guided
Canon EOS 350D modded, Astronomik CLS
10x120s, 4x180s darks, flats, ISO 800
Captured in APT, Processed in Nebulosity, PS CS5 and Adobe Lightroom
Lost some subs due to clouds. Need more subs.

NGC 7635 Bubble Nebula (C11)

2017-01-31T10:52:45+00:0029 September 2011|Caldwell, Finest NGC, Nebula, News, NGC Autumn|

Emission nebula, Cassiopeia
Mag. 10 Size 15’x8′
2012-09-12
200mm f8 RC
10x180s, 7x240s ISO 800, darks, flats
Canon EOS 350D modded, Astronomik CLS
Captured in APT, Processed in Nebulosity, PS CS5
Second light with RC8. Some camera misalignment so star trailing on the RHS.

NGC 7635 Closeup
NGC 7635

2011-09-28
200mm f5 Newtonian MPCC Guided
Canon EOS 350D modded, Astronomik CLS
10x240s 19x180s, darks, flats,  ISO 800
Captured in APT
Processed in Nebulosity and PS CS5

“NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The “bubble” is created by the stellar wind from a massive hot, 8.7 magnitude young central star, the 15 ± 5 M? SAO 20575 (BD+60 2522). The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow. It was discovered in 1787 by Friedrich Wilhelm Herschel. The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses.”
Wikipedia

 

NGC 6960 Western Veil (C34) Reprocessed 2017-03-28

2017-03-31T15:55:30+00:0030 March 2017|Caldwell, Finest NGC, Nebula, News, NGC Summer|

Supernova remnant, Cygnus (“Witch’s Broom”)
Caldwell 34, Finest NGC 99a, SAC110 44
Size 70’x6′
2011-09-20
200mm f5 Newtonian MPCC Guided
Canon EOS 350D MODDED, Astronomik CLS
5x240s 15x180s, darks, flats,  ISO 800
Captured in APT
Processed in Nebulosity and PS CS5

First light with the modded 350D. So much easier to capture and process the nebulosity.

Reprocessed in 2017-03-28 with Adobe Lightroom.

Original image:

NGC 6992/6995 Eastern Veil (C33) – reprocessed

2017-03-06T11:19:03+00:0021 February 2017|Caldwell, Finest NGC, Nebula, News, NGC Summer|

Supernova remnant, Cygnus
Caldwell 33, Finest NGC 99b, SAC110 45
Size 60’x8′
2011-08-24
200mm f5 Newtonian MPCC Guided
Canon EOS 350D, Astronomik CLS
5x240s 20x180s, darks, flats,  ISO 800
Captured in APT
Processed in Nebulosity and PS CS5
2017-02-21 Re-processed in Lightroom CC

NGC 6995 is the irregularly shaped nebulosity in the left of the image, and NGC 6992 is the curved arc in the right of the image.

An incredibly rare and clear night with the Milky Way easily visible.
Original image: