NGC Summer

//NGC Summer
NGC Summer2017-01-31T10:52:41+00:00

Choose from

M92 RGB

Because sky conditions were very poor I went back to globulars as nebulosity can easily disappear in LP and fog. APP got rid of the massive gradients and LP quite well I think.

Object ID M92 (NGC6341)
Details Size 14′, Mag. 6.3
Hercules
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX -15C
Exposure(s) 10x180s ea RGB 1×1
darks, flats, bias
Capture APT
Processing APP, Photoshop
5 December 2019|Globular Cluster, News, NGC Summer|

Cygnus Wall NGC 700 (Caldwell 20)

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
21 September 2019|Caldwell, Narrowband, Nebula, News, NGC Summer|

Pelican Nebula TR IC 5070 HOYS-CAPS data

A by-product of doing HOYS-CAPS data for V1490Cyg in Tri-colour R, decided to make a stacked image out of it. 30 subs over 6 months.

At least 4 Herbig-Haro objects imaged in this and marked out in the greyscale version.

Object ID IC 5070
Pelican Nebula
Details Cygnus
Mag. 8, 60’x50′
Telescope 250mm f4.8 Newtonian
Camera Atik 460EX
Exposure(s) 30x180s R
Capture APT
Processing DSS, Nebulosity, Photoshop

“The Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming cold gas to hot and causing an ionization front gradually to advance outward. Particularly dense filaments of cold gas are seen to still remain, and among these are found two jets emitted from the Herbig–Haro object 555. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will leave something that appears completely different.”

“Herbig–Haro (HH) objects are bright patches of nebulosity associated with newborn stars. They are formed when narrow jets of partially ionized gas ejected by said stars collide with nearby clouds of gas and dust at speeds of several hundred kilometers per second. Herbig–Haro objects are ubiquitous in star-forming regions, and several are often seen around a single star, aligned with its rotational axis. Most of them lie within about one parsec (3.26 light-years) of the source, although some have been observed several parsecs away. HH objects are transient phenomena that last around a few tens of thousands of years. They can change visibly over quite short timescales of a few years as they move rapidly away from their parent star into the gas clouds of interstellar space (the interstellar medium or ISM). Hubble Space Telescope observations have revealed the complex evolution of HH objects over the period of a few years, as parts of the nebula fade while others brighten as they collide with the clumpy material of the interstellar medium.”

Wikipedia

14 September 2019|HOYS, Nebula, News, NGC Summer|

Cave Nebula Sh2-155 / Caldwell 9

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
9 September 2019|Caldwell, Narrowband, Nebula, News, NGC Summer|