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Showing results for tags 'alnitak'.
Found 18 results
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From the album: Deep Sky Imaging
Another image of one of the most popular objects imaged by astroimagers... The Horsehead Nebula/Barnard 33 with Alnitak and the Flame Nebula, but exposed mainly through narrowband filters, but emulating natural colors of the object. I was planning to combine H-Alpha as red, OIII as green and H-Beta as blue channels to create a natural colour image through CCD narrowband filters, eliminating any light pollution or moon sky-glow in the process. Unfortunately, the last night when I was able to do any imaging of subs for this object was on the 20th February before it became cloudy every day and night with constant rain. Having already completed the capture H-Alpha and RGB data, I set my exposure plan to alternate between OIII and H-Beta subs during that night, which is lucky because I only had a short window of a few hours and it turned out to be my final night of imaging for the foreseeable future. I managed to get only 3 x 30 minute H-Beta and 4 x 20 minute OIII narrowband subs. After waiting for a couple of weeks, I figured that I'm not going to get much decent time on Barnard 33 before it become obscured by landmarks so I decided to combine my currently exposed subs, H-Alpha into red, OIII into green and H-Beta into blue, as planned, and added 25% intensity from my RGB subs resulting in the image above. This image total exposure time was 9 hours and 32 minutes, channels consisting of 15 x 600 second H-Alpha, 4 x 1200 second OIII and 3 x 1800 second H-Beta 7nm narrowband subs with only 25% intensity added from the 14 subs each through red (180s), green (300s) and blue (600s) filters. Taken through a 80mm Refractor @ f6.25, on a hypertuned CGEM mount with QHY268M camera. I think that my narrowband imaging imitating natural color experiment is (once again) successful... the first time I tried this filter to channel alignment was on the Trifid nebula last August. The advantages of exposing images through this narrowband filter to channel alignment is that most of (if not all) light pollution is rejected, imaging is possible during moon light (within reason), colors look natural, I find that more detail is captured through narrowband compared to broadband filters and narrowband filtered subs are much less susceptible to lens flares and/or internal reflections when there are bright stars near by to the object. The only disadvantage I can think of is that the subs exposure times are a lot longer, resulting in much longer total exposure times needed for each image... although I'm starting to doubt this fact now after seeing how clean my H-Beta and OIII stack ended up being when they were stacks of only 3 and 4 subs... perhaps shorter exposure time per channel will suffice?© Mariusz Goralski
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- barnard 33
- horsehead nebula
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Hi Astronomers, Sharing with you another of my images... another image of one of the most popular objects imaged by astroimagers... The Horsehead Nebula/Barnard 33 with Alnitak and the Flame Nebula, but exposed mainly through narrowband filters, but emulating natural colors of the object. I was planning to combine H-Alpha as red, OIII as green and H-Beta as blue channels to create a natural colour image through CCD narrowband filters, eliminating any light pollution or moon sky-glow in the process. Unfortunately, the last night when I was able to do any imaging, to expose subs of this object was on the 20th February before it was cloudy every day and night with constant rain. Having the H-Alpha and RGB data in the can, I set my exposure plan to alternate between OIII and H-Beta subs because during that night, which is luck because I only had a short window of a few hours and it turned out to be my final night of imaging for the forseeable future. I managed to get only 3 x 30 minute H-Beta and 4 x 20 minute OIII narrowband signal. After waiting for a couple of weeks, I figured that I'm not going to get much decent time on Barnard 33 before it become obscured by landmarks so I decided to combine my currently exposed subs, H-Alpha into red, OIII into green and H-Beta into blue, as planned, and added 25% intensity from my RGB subs. This image total exposure time was 9 hours and 32 minutes, consisting of 16 x 600 second 7nm narrowband H-Alpha, 4 x 1200 second 7nm narrowband OIII and 3 x 1800 second 7nm H-Beta with only 25% intensity added from the 14 subs each through red (180s), green (300s) and blue (600s) filters. Taken through a 80mm Refractor @ f6.25, on a hypertuned CGEM mount with QHY268M camera. I think that my narrowband imaging imitating natural color experiment is (once again) successful... the first time I tried this filter to channel alignment was on the Trifid nebula last August. The advantages of exposing images through this narrowband filter to channel alignment is that most of (if not all) light pollution is rejected, imaging is possible during moon light (within reason), colors look natural, I find that more detail is captured through narrowband compared to broadband filters and narrowband filtered subs are much less susceptible to lens flares/internal reflections when there are bright stars near by or near the objects. The only disadvantage I can think of is that the subs exposure times are a lot longer, resulting in much longer total exposure times needed to be spend on each image... although I'm starting to doubt this fact now after seeing how clean my H-Beta and OIII stack ended up being when they consisted only of 3 and 4 subs and perhaps shorter exposure time per channel will suffice? Clear Skies, Mariusz
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- horsehead nebula
- barnard 33
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From the album: Deep Sky Imaging
One of the most popular object for astroimagers... The Horsehead Nebula/Barnard 33 with Alnitak and the Flame Nebula. As I continue to have terrible sky conditions for astroimaging, I'm struggling to complete any images before the imaged object season is finished. Seems like my nights are perpetually cloud covered. I'm keeping an eye on the sky, and when I spot some clarity, I immediately open the observatory and start to gather photons. I captured this image by noticing that there was a clear window of opportunity and managed to have a couple of hours of clarity before clouds returned. I'd like to capture at-least another hours worth of exposure time through this filter to smooth out some of the noise but also would like to capture other color channels and create a color photo... but with the weather being against me, I'm running out of time. This images total exposure time was 1 hour and 40 minutes, consisting of 10 x 600 second 7nm narrowband H-Alpha subs. Taken through a 80mm Refractor @ f6.25, on a hypertuned CGEM mount with QHY268M camera.© Mariusz Goralski
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Hi All, Sharing my image of one of the most popular object for astroimagers... The Horsehead Nebula/Barnard 33 with Alnitak and the Flame Nebula. As I continue to have terrible sky conditions for astroimaging, I'm struggling to complete any images before the imaged object season is finished. Seems like my nights are perpetually cloud covered. I'm keeping an eye on the sky, and when I spot some clarity, I immediately open the observatory and start to gather photons. I captured this image by noticing that there was a clear window of opportunity and managed to have a couple of hours of clarity before clouds returned. I'd like to capture at-least another hours worth of exposure time through this filter to smooth out some of the noise but also would like to capture other color channels and create a color photo... but with the weather being against me, I'm running out of time. This images total exposure time was 1 hour and 40 minutes, consisting of 10 x 600 second 7nm narrowband H-Alpha subs. Taken through a 80mm Refractor @ f6.25, on a hypertuned CGEM mount with QHY268M camera. Clear Skies.
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- barnard 33
- ic434
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The Horsehead , The Flame and Alnitak - HaO3RGB JanFeb2020
MarsG76 posted a gallery image in Member's Album
From the album: Deep Sky Imaging
I managed to get some time to process another of my images exposed in January/February 2020. This was the last image when my USB port on my Astro40D failed. This happened while imaging this scene but it happened toward the end of the imaging plan so I got almost the subs that I wanted. The total exposure time was 16 hours and 16 minutes in ISO1600 for all of the subs, RGB, (OSC through the UV/IR Cut filter), HAlpha and OIII. Imaged through my 8" SCT at f6.3, 1280mm FL.© Mariusz Goralski
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From the album: Alt-Az / NoEQ DSO challenge
Try 2 at all nebulas around alnitak, from heavy light-polluted skies oh home around Paris but with UHC filter. Much better than try 1, thanks to number of subs, but still difficult to come, I suppose because of limited sensor depth. (or is it LP?). However some color is missing, had to use manual BV calibration in Regim to get something barely acceptable. Capture: 101 good of 123 lights x 25s x 2500iso, 30 NG darks, Olympus E-PM1 with Skywatcher 130PDS on Celestron Nexstar SLT, Skywatcher ComaCorr and TS-UHC filter. Processing: Regim, Fotoxx Date: 2017-01-21 Place: suburbs 10km from Paris, France.© Fabien COUTANT
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From the album: Deep Sky Imaging
Horsehead and Flame nebulae around the star "Alnitak" in "Orion's Belt" in the constellation of Orion. The nebulae are located approximately 1350LY for Flame nebula and 1500LY for the Horsehead curtain glow nebula. Alnitak is a bit closer at about 1250LY and is the source of light for the glow of the nebulae. The Horsehead nebula is a cold dark nebula silhouetted against the pink hydrogen alpha emission nebula IC434. The Horsehead shape is just the shape of the nebula that blocks that part hydrogen emission of IC434. This image was taken using a full spectrum modded Canon 40D. Image consists of Hbeta, HAlpha and OIII data as well as RGB taken through IR cut and neodymium filters across multiple nights in November and December 2015.© Mariusz Goralski
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Alnitak on Orion's Belt with the Flame and Horsehead nebulae
MikeODay posted a gallery image in Member's Album
From the album: Mike's Images
Orion's Belt - centered on "Alnitak", a 1.7 magnitute tripple star at one end of the belt. Includes the Flame Nebula (NGC2024) and IC434 which contains the Horsehead Nebula. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. UHC-S - 19 x 2min ISO400 (12bit NEF, Long Exp. NR on). Raw conversion, initial colour balance and shadow and hightlight recover in DXO Optics Pro, aligned and stacked in Nebulosity, processed in Photoshop 5 October 14© Copyright Mike O'Day 2015 - all rights reserved
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From the album: Mike's Images
© Copyright Mike O'Day 2014 - all rights reserved
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1. Alcyone (Eta Tauri, η Tau, 25 Tau) in the Pleiades open cluster, spectral type B7IIIe+A0V+A0V+F2V. This star is a multiple system, but my goal of observation was the H-alpha profile of the main component: Horizontal axis scaled to radial velocity: 2. Pleione (28 Tau, BU Tau) also in M45, spectral type B8Vne, variable star, the brightness changes in range: 4.83 - 5.38 V. This is the faintest star, which I observed with using APO 107/700 & Low Spec spectrograph 1800 l/mm. It was difficult, but obervation was positive (high gain, exposure time 4 min): 3. Tianguan (Zeta Tauri, ζ Tau), spectral type B1IVe+G8III: (mark ":" according to the VSX database means uncertainty). This is an eclipsing binary with variability type E/GS+GCAS, period is 133 d. The brightness changes in range: 2.80 - 3.17 V. 4. Cih, Tsih (γ Cas), spectral type B0.5IVpe, variable star with a magnitude range of 1.6 to 3 V: 5. Alnitak (Zeta Orionis, ζ Ori), spectral type O9.5Ibe+B0III. Variable star with a magnitude range of 1.74 to 1.77 V. Spectral lines have characteristic P Cygni profile, below H-alpha:
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Hello Astronomers, I managed to get some time to process another of my images exposed in January/February. This was the last image when my USB port on my Astro40D failed. This happened while imaging this scene but it happened toward the end of the imaging plan so I got almost the subs that I wanted. The total exposure time was 16 hours and 16 minutes in ISO1600 for all of the subs, RGB, (OSC through the UV/IR Cut filter), HAlpha and OIII. Imaged through my 8" SCT at f6.3, 1280mm FL on the CGEM mount. Clear Skies, MG
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- horsehead nebula
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From the album: The next step.
I like the flame nebula and the horsehead appearing was a bonus as well. approx 16 x 1min exposures canon 300D, 200p EQ5 - DSS.© Aenima
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- orion
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I've been sitting on this data for quite a while (it's from Jan 2017). I've had a few goes at trying to process it, but always junked the results - mostly because of Alnitak! I've bitten the bullet and just posting it here to try and draw a line under this lot (and I've not done much else recently - illness and summer light nights...). Flare and scattered light in the field hasn't helped me and there's a bit of fringing with the brightness of the star. I have since cleaned the objective on the FLT110 as it was filthy, and I may have struggled with transparency, but I'm not sure what else I could do here to bring out more detail or contrast into the image with Alnitak sitting in the field - it just feels a little "soft" ?. It also throws the colour balance off a bit - I think this is an Ok version, but the Flame is perhaps a little on the red side. Details are: ST2000XM + FLT110 (with FR at f5.6). LRGB : 29x5m, 25x5m, 17x5min, 15x5min (RGB 2x bin) Captured Jan 2017 C&C welcome...
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I don't seem to get to do many imaging projects for myself these days. This year in particular seems to have been particularly lacking in clear dark nights, I don't know if you would agree? Complicating matters further in my locale has been a huge and long lasting A45 bypass, three years and still not quite finished. The site has been working 24/7, and they put perimeter lights all around the temporary site office complex. At the same time my kind neighbour (who knows what I do for a hobby and for pocket money) decided to install the brightest floodlight I have ever seen, and leave it on all night every night, shining at 90° over my garden.... At any rate, I found some subs that I captured in March of this year using a Skywatcher Esprit 150ED, and Atik 11000 camera. I don't actually remember capturing the data to be honest, so it was a nice surprise to find it on my HDD. Possibly the most photographed DSO in the sky, the iconic Horsehead nebula is instantly recognisable. For this picture I have combined a little bit of RGB colour data with the bulk of the data gathered with a Hydrogen alpha filter. Recently @ollypenrice posted a lovely picture of the same area, and somebody made a Facebook comment about letting the stars shine out. Which got me to thinking, rather than try an minimise the effects of Alnitak, the huge, hot, blue star on the mid left, I'd just let it do it's thing, dominating the picture, as it dominates in the eyepiece. Although the flame nebula and rear of the Horsehead are the brightest emission nebulae in the vicinity, the whole area is awash with thick clouds of gas and dust. This image represents the way I imagine the area would look if we could get in a bit closer. The image represents around 15 hours of Ha data, and 45 mins or so of Red, Green and Blue. Thirty minute Ha exposures. I've included the Ha image alone, and also a cropped approximation of the actual eyepiece views you may experience in dark skies, with a 16 inch telescope, using a Hydrogen beta filter. I saw this for the first time in the autumn and had of those astro moments that stays with you for a long time. A Hb filter is definitely on my shopping list once I get my dob mirror sorted. Thanks for looking. Tim
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I struggled to try to significantly reduce the quite apparent noise without losing too much detail in the clouds. In the end I decided to keep the detail ( and the noise ). Details: Orion's Belt - centred on "Alnitak". A 1.7 magnitute tripple star at one end of the belt. Includes the Flame Nebula (NGC2024) and IC434 which contains the Horsehead Nebula. RA 16h 41m 42s, Dec -48deg 48' 46". Approx. 3800 light years away. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount (on concrete pier). Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, no filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. 300 subs in total. 63 x 10 sec ISO100. 38 x 20 sec ISO200 . 21 X 20 sec ISO800. 165 x 30 sec ISO800. 13 x 60 sec ISO800. (14bit NEF, Long Exp. NR on). Pixinsight and photoshop. 18th December 2015. source: http://photo.net/photos/MikeODay https://500px.com/mikeoday
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Orion's Belt - centered on "Alnitak", a 1.7 magnitute triple star at one end of the belt. Includes the Flame Nebula (NGC2024) and IC434 which contains the Horsehead Nebula. Links: 500px.com/mikeoday photo.net/photos/MikeODay Details: Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. UHC-S - 19 x 2min ISO400 (12bit NEF, Long Exp. NR on). taken 5 October 14 reprocessed with Pixinsight and Photoshop 6 Sept 15
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Re-processed to try to bring increase the brightness of the various nebulae and increase the contrast a little without futher blowing out the stars and adding too much noise ... orignial: Orion's Belt - centred on "Alnitak", is a 1.7 magnitude triple star 740 light years from Earth and appears at one end of the belt. The Flame nebula ( cat: NGC 2024 or Sharpless 2-277 ) ( lower centre left of the image) glows yellow-pink due to the ionising radiation that comes from Alnitak. Seen from Earth, the Flame nebula is behind Alnitak and around 80 light years further away from Earth. The Horsehead nebula ( cat: Barnard 33 ) ( centre right of the image ) is a dark dust and gas cloud that is only visible from Earth due to the backlight illumination and silhouetting caused by the bright pink glow from the ionised hydrogen gas in the emission nebula IC 434. The bright blue reflection nebula below and to the left of the Horsehead is NGC 2023. Details: Combination of two sessions over a year apart. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion 80mm f5 guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, no filter. Nikon D5300 (unmodified). 14bit NEF, Long Exp. NR on. 18 Dec 2015. 21 x 20 sec ISO 800. 165 x 30 sec ISO 800. 13 x 60 sec ISO 800 . Baader UHC-S , 12bit NEF, Long Exp. NR on. 5 Oct 2014. 19 x 2min ISO400 Pixinsight Links:. https://500px.com/mikeoday http://photo.net/photos/MikeODay
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Hello to all, this is my first color image using my STF-8300M and Baader LRGB filters. In addition, this is my first image processed in PixInsight. Please provide feedback on it; I don't mind constructive and respectful critique. Astrobin:
