Stargazers Lounge Uses Cookies
Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.
Search the Community
Showing results for tags 'm78'.
Found 7 results
-
Seems an easy target but it isn't. Need time to improve S/N ratio. There is a huge Ha area on the left, I was fooled and tried to remove the "gradient" Hope you like it! Thanks! The nebula Messier 78 (also known as M 78 or NGC 2068) is a reflection nebula in the constellation Orion. It was discovered by Pierre M\xc3\xa9chai n in 1780 and included by Charles Messier in his catalog of comet-like objects that same year. M78 is the brightest diffuse reflection nebula of a group of nebulae that include NGC 2064, NGC 2067 and NGC 2071. This group belongs to the Orion Molecular Cloud Complex and is about 1,600 light years distant\xc2\xa0from Earth. M78 is easily found in small telescopes as a hazy patch and invol ves two stars of 10th magnitude. These two stars, HD 38563A and HD 38563B, are responsible for making the cloud of dust in M78 visible by reflectin g their light. Telescope: FSQ ED85 Camera: Atik 460 Filters: Baader LRGB Total exposure: 7h Mount: EQ6 Location: Mt. Parnon, Greece More: http://www.celestialpixels.com/Nebulae/i-hrnGScG/A
- 20 replies
-
- 24
-
-
The last of my images from France. Taken with an SW 150mm Esprit, QSI683 on a 10 micron GM2000HPS. There were some unexplained issues with this image and I didn't get as much colour data as I would have liked as it was my last image on the last night.
-
Another M78 I'm afraid - bit of a glut of these lately. This one from data taken in Nov/Dec, but only really finally got round to processing. Had to be very careful on combination and processing to reduce noise as much as possible to try to allow me access to the faint stuff. Taken with ST2000XM, WO FLT110 (with 0.8x FR) on a Losmandy Titan. L: 21x15m+9x10m R: 18x10m 2x2bin G: 15x10m 2x2bin B: 14x10m 2x2bin Reduced/Processed in PI, with a few tweaks afterwards in PS. Thanks for looking Blog post with details about the region/image: https://www.chromosphere.co.uk/2017/02/02/m78-reflection-dust-star-birth-orion/
-
Date: 17th March 2018 Location: Ballycroy international dark sky site in Co. Mayo, Ireland Telescope: Takahashi FS-128 with 0.75 reducer flattener Camera: Nikon D750 Mount: Vixen AXD2 Just 20 x 120s subs for 40 mins integration (far too little!). Same circumstances as the previous images I've posted lately - severely underexposed flats ruined images. Helped by this forum to realise problem. New flats with slightly different setup miraculously fixed problem. Comments and criticisms welcome, and thanks for looking. Barry Okay, I promise I'll stop spamming images now! -
Here is a modest attempt on M78 two days ago. Info: 30 x 240s Light, 36 x 240s Dark, 256 x 0.01s Flat/FlatDark - all frames taken at -20C TS photoline 80mm F/6, Hutech IDAS LPS P2, ASI178MCC, TS Reducer/flattener x0.79 HEQ5, SW ST102 / QHY5IILc - guiding (mounted side by side setup), Lacerta led flatfield box Resolution: original 1.27"/pixel, binned to 40% Software: ImageJ for calibration / debayer, DSS for registration, ImageJ for stacking (kappa-sigma clip), StarTools for processing. Conditions: very cold, NELM ~4.0-4.5, heavy LP (red zone) - a lot of haze both from fog and from local chimneys. I initially aimed for 4h of exposure, and hoped for a good evening, but weather and conditions did not play along. I lost first two hours due to rapid drop in temperature - forecast was stable -4C but it turned out that temperature dropped to -7C so due to that and probably not fully cooled scope (taken from unheated basement out and cooled for 1h / 1.5h prior to focusing) - first two hours prior to meridian flip were really out of focus. Unfortunately, I did not spot that since I ran inside to warm up when I finished setup and started looping exposures. Further due to high air pressure and wind settling down - night turned out to be quite foggy - I was able to play star wars light sabre with my hand torch when I went out to do meridian flip. At the end of the session - everything was covered in frost - even laptop screen, also there were some fogging on objective lenses and even some ice crystals forming (Is this bad for the coatings?). Processing was also really difficult - low signal aside, DSS does not play nice with large (6mp) files and large number of frames. So I used the following workflow: I did my own calibration in ImageJ, everything done in 32bit precision, then ran my own debayer plugin for ImageJ (rewrite of debayer plugin that works in 16bit) - to produce R,G,B channels. Then I used DSS to do registration and alignment - I used option to save registrated frames. Then I loaded registrated frames in ImageJ and did kappa sigma clip stacking (also my own plugin). After that I used StarTools on r,g and b stacks to compose image from channels - basic develop, bin, wipe (color cast), some basic color correction and HDR, develop again - no noise reduction. Happy new year, and thanks for looking.
-
Evening all - decided to finally publish this been returning to on and off for a while and decided not much more i can do with it. Widefield RGB stars are a struggle still for me, wont be getting any HA for a while which i could have used to better control so decided it's time to jump in as is! It comprises of some relatively short LRGB taken on a wide-field Rokinon 135 - I then created a composite luminance layer from scratch featuring the Rokinon and FSQ data for each object. Totalling about 34 hours of exposure. I blended the composite lum with the Rokinon RGB and then reinforced this further with some colour from the original stand-alone images. Hope you enjoy. Paddy
- 26 replies
-
- 36
-
-
From the album: DoctorD's Photos
102MAK with F3.3 reducer and Baader Moon & Skyglow filter at 30s exposure
