Nebula Archives - Silios.gr

NGC6910 Gamma Cygni and nebulosity

HaRGB version of the beautiful Gamma Cygni and surrounding nebulosity region.

NGC 6910 is a Y-shaped cluster oriented northwest southeast. The two brightest stars are of magnitude 7.NGC 6910 is a small cluster, only 10′ in diameter

The southernmost star is SAO 49563 (or V2118 Cygni), a variable star of spectral type B1.5Ia. Gamma Cygni, not far off the galactic plane is subject to a great deal of interstellar extinction and reddening from interstellar dust. The dust selectively absorbs and scatters blue light (roughly 1/wavelength), so when you look at a star through dust it will appear redder than it really is (basically the same reason the sun is reddened at sunset). The intrinsic B-V color of a B1.5Ia super giant is -0.2. The observed color is 0.83, about the color of a K0 dwarf or a G5 giant, so the star appears yellowish to the eye. Notice the yellow stars in the cluster, caused by interstellar dust, and the bluish-white stars in the vincinity of NGC 6910.

Technical details
Sky-Watcher 80ED Pro Black Diamond
SBIG 8300M
HEQ5 Pro
QHY5
Skywatcher .85x Focal Reducer & Corrector
PixInsight, Main Sequence Software SequenceGeneratorPro
Accessories: Starlight Xpress Starlight Xpress FW 5*2”
Resolution: 1676×1266
Dates: June 13, 2015

Frames:
Baader 7nm Ha 2”: 10×300″ -5C bin 2×2
Baader Blue 2″: 10×120″ -5C bin 2×2
Baader Green 2″: 10×120″ -5C bin 2×2
Baader Red 2″: 10×120″ -5C bin 2×2

Integration: 1.8 hours
Darks: ~50
Flats: ~10
Bias: ~300
Avg. Moon age: 25.75 days
Avg. Moon phase: 15.29%
Bortle Dark-Sky Scale: 2.00
Temperature: 17.50

Annotated version :

NGC2237 Rosette Nebula in HA

A quick go on this spectacular nebula, as it is currently too low on the horizon for serious light gathering.
I hope next year’s weather will allow more data!

Target details
The Rosette Nebula (also known as Caldwell 49) is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula’s matter.
The complex has the following NGC designations:
NGC 2237 – Part of the nebulous region (Also used to denote whole nebula)
NGC 2238 – Part of the nebulous region
NGC 2239 – Part of the nebulous region (Discovered by John Herschel)
NGC 2244 – The open cluster within the nebula (Discovered by John Flamsteed in 1690)
NGC 2246 – Part of the nebulous region

The cluster and nebula lie at a distance of some 5,200 light-years from Earth (although estimates of the distance vary considerably, down to 4,900 light-years.) and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.
It is believed that stellar winds from a group of O and B stars are exerting pressure on interstellar clouds to cause compression, followed by star formation in the nebula. This star formation is currently still ongoing.
A survey of the nebula with the Chandra X-ray Observatory in 2001 has revealed the presence of very hot, young stars at the core of the Rosette Nebula. These stars have heated the surrounding gas to a temperature in the order of 6 million kelvins causing them to emit copious amounts of X-rays.

Gear used
Sky-Watcher 80ED Pro Black Diamond
SBIG 8300M
HEQ5 Pro
Guiding camera: QHY CCD QHY5 mono
Focal reducer: Skywatcher .85x Focal Reducer & Corrector
Filters: Baader 7nm Ha 2”
Starlight Xpress Starlight Xpress FW 5*2”

Processed in PixInsight

Resolution: 1743×1380
Dates: April 12, 2015
Frames: Baader 7nm Ha 2”: 10×600″ -5C bin 2×2
Integration: 1.7 hours
Darks: ~20
Flats: ~20
Bias: ~20
Avg. Moon age: 21.98 days
Avg. Moon phase: 51.77%
Bortle Dark-Sky Scale: 3.00
Temperature: 3.00
Locations: Amarynthos obs, Amarynthos, Evia, Greece

NGC5070 Pelican nebula DSLR

Just found some data from the early tries in astrophotography from the summer of 2014 and gave them a go at post processing.
A lot of comma on the edges since I didn’t have an FFR at the time.
The image was captured with a Canon 350D with IR mod (filter removal). Halos around the stars are due to UHC-S filter.

This image contains: Pelican nebula, IC 5070, The star 57Cyg, The star 56Cyg

Sky-Watcher 80ED Pro Black Diamond
Canon 350D
Filters: Baader UHC-S
HEQ5 Pro

Guiding telescope : SKYWATCHER 70/500
Guiding camera : QHY CCD QHY5 mono

Software: PixInsight

Resolution: 3574×2414
Dates: July 28, 2014
Frames: Baader UHC-S : 6×720″ ISO800 bin 1×1

Integration: 1.2 hours
Darks: ~10
Flats: ~10
Bias: ~20

Avg. Moon age: 0.94 days
Avg. Moon phase: 1.00%
Bortle Dark-Sky Scale: 3.00

Temperature: 28.00
RA center: 312.657 degrees
DEC center: 44.441 degrees
Pixel scale: 2.198 arcsec/pixel
Orientation: 94.943 degrees
Field radius: 1.317 degrees

Location: Katsaros obs, Katsaros, Kalamata, Greece

NGC6960 – Veil Nebula

Just found some data from the early tries in astrophotography from the summer of 2014 and gave them a go.
A lot of comma on the edges since I didn’t have an FFR at the time.
The image was captured with a Canon 350D with IR mod (filter removal). Halos around the stars are due to UHC-S filter.

This image contains: Veil nebula, Lace-work nebula, Filamentary Nebula, NGC 6960, The star 52Cyg
Sky-Watcher 80ED Pro Black Diamond
Canon 350D
HEQ5 Pro

Guiding telescope: SKYWATCHER 70/500
Guiding camera: QHY CCD QHY5 mono

Software: PixInsight

Filters: Baader UHC-S

Resolution: 3253×2306
Dates: July 27, 2014

Frames: 12×1200″
Integration: 4.0 hours

Avg. Moon age: 0.05 days
Avg. Moon phase: 0.00%
RA center: 311.481 degrees
DEC center: 30.732 degrees
Pixel scale: 2.200 arcsec/pixel

Orientation: 105.796 degrees
Field radius: 1.219 degrees

Locations: Katsaros obs, Katsaros, Kalamata, Greece