Narrowband

/Narrowband

Cygnus Wall NGC 700 (Caldwell 20)

By |2019-09-21T16:27:20+00:0021 September 2019|Categories: 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 ID NGC 7000, C20
Details Mag. 4
Size: 120′ x 100′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX, Baader filters
-15C
Exposure(s) 10x300s ea in Ha and OIII
Capture APT
Processing APP, Photoshop
Mapped HOO and moved to the blue end
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Wizard Nebula HOO NGC 7380

By |2019-09-21T16:29:13+00:0013 August 2019|Categories: Narrowband, Nebula, News, NGC Summer|

After doing HOYS-CAPS data on a very murky, moonlit night, decided to try narrowband on this.

Object ID NGC 7380
Wizard Nebula
Details Cepheus
Mag. 7.2, 25′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Exposure(s) 10x300s Ha, 5x300s OIII
Capture APT
Processing DSS, Nebulosity, Photoshop
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Cave Nebula Sh2-155 / Caldwell 9

By |2019-09-21T16:29:23+00:009 September 2019|Categories: 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 ID Cave Nebula
Sh2-155 / C9
Details Cepheus
Mag. 7.7, 50′ x 30′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Exposure(s) 10 x 180s each Ha OIII SII 2×2
Capture APT
Processing DSS, Nebulosity, Photoshop
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NGC 6888 / Caldwell 27 Crescent Nebula SHO

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

A new one for me

Object ID NGC 6888
Crescent Nebula
Details Cygnus
Mag. 7.4, 18′ x 12′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Exposure(s) 7 x 300s each Ha, OIII, SII
Capture APT
Processing DSS, Nebulosity, Photoshop
Mapped SII, Ha, OIII -> RGB
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B33 Horsehead in narrowband

By |2019-01-14T16:26:53+00:0014 January 2019|Categories: 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 ID B33 in IC343
Details 2019-01-13
Telescope 250mm f4.8 Newtonian
MPCC
Guided PHD2
Camera Atik 460EX
Baader Ha, OIII, SII filters
Exposure(s) 15x200s 2×2 each filter
15 each of darks, flats, bias
Capture APT
Processing Nebulosity and Photoshop
Colour mapping:
OHS: OIII, Ha, SII
HOS: Ha, OIII, SII.
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