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Showing results for tags 'star'.
Found 53 results
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Hi everyone - juts purchased my first telescope and am asking for advice on what is best to be seen through this telescope as a starter - have already seen the moon and some distant stars and am comfortable with using all of the eye pieces included. What would anyone recommend? -
Since I am very new to this, I struggle a lot. Especially when observing planets and also recently deep sky objects. My telescope is an amateur telescope and its almost 11 years old (The telescope was re used a year ago). During summer of last year I took photos of Saturn,Jupiter and a month ago took photos of Venus and Mars. About 2 days ago I stumbled upon a new thing in the sky, (Unfortunately, I didn't take a picture). It definitely was in the Orion constellation as I had observed Betelgeuse and the 3 stars that were close to each other. After a couple of minutes later I saw 2 stars next to each other and another two which were on top of the other star, surrounding these set of stars were a blue-ish and grey-ish colour at the same time. I had done some research and many people told me it was the trapezium cluster found in Orion. I honestly don't know. Any ideas? Thanks.
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NGC6559 at the center of the milkyway is a photo I created from RGB filters only and at BIN1. Telescope: ASA 12'' F3.6 Mount: DDM 85 Unguided Camera: FLI 16200 Mono Filters: Astrodon Thanks for watching Haim Huli My Flickr Page: https://www.flickr.com/photos/101543943@N04/
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I am selling my Star Adventurer Pro bundle. The full set is packed in a flight case ready to go. It also includes an extra counterweight pack (an extra 1kg weight and extension bar). I use the additional weight for balancing an ED80 or my Lunt Ha scope. It has seen very limited use so is in excellent condition. I am asking £169 (no offers) pick up from the Harrogate area. The bundle weighs close to 8kg. Bank transfer please. In the flight case: Instruction manual SA mount Ball head adapter Illuminated polar scope Dovetail L bracket Equatorial wedge Counterweight kit x 2 (2 x 1kg) Keys for the flight case -
Update: 3rd June Re-processed to remove slight magenta tint caused by the non-uniform removal of light pollution by the DBE process ( it was being fooled by the very bright image centre ). The globular star cluster Omega Centauri ( NGC 5139 ) in Centaurus ( please click / tap on image to see larger and sharper ) A full size image can be found here. original below ..... A newly captured ( May 2018 ) image of the great southern globular star cluster, Omega Centauri ( NGC 5139 ) Omega Centauri ( NGC 5139 ) in Centaurus - ( please click / tap image to see larger and sharper ) A full size ( ~ 6000 x 4000 ) image can be found here ....... This image is an attempt to look deeply into the mighty Omega Centauri star cluster and, by using HDR techniques, record as many of its faint members as possible whilst capturing and bringing out the colours of the stars, including in the core. Image details: Resolution ........ 0.586 arcsec/px ( full size image ) Rotation .......... 0.00 deg ( up is North ) Focal ............. 1375.99 mm Pixel size ........ 3.91 um Field of view ..... 58' 20.9" x 38' 55.1" Image center ...... RA: 13 26 45.065 Dec: -47 28 27.26 Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher Eq8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels)\ Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( May 2018 ) 8 sets of sub-images with exposure duration for each set doubling ( 2s to 240s ) all at ISO 250. Processing: Calibration: master bias, master flat and master dark Integration in 8 sets HDR combination Pixinsight May 2018- 56 replies
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Hi, I am doing an end of degree project on variable stars due next thursday and London's weather does not allow finish it. I was wondering if someone would do me the favour of observing the pulsating variable star V0460 Andromeda http://variablestars.net/stars/460/ in the Johnson R filter, for a period of 1 hour and 50 minutes? please? Thanks so much!
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Carina Nebula with the bright unstable star Eta Carinae in the centre of the image. edit ( 27 March ): Tweak to shadow levels to bring out more detail and also a slight reduction in the brightness of the highlights. A much larger version ( 4562 x 3072 6062 x 4082) is available on my Flickr page. previous version: Carinae Nebula ( NGC 3372 ) ( please click / tap on image to see larger and sharper ) From Wikipedia ... "Eta Carinae is a highly luminous hypergiant star. Estimates of its mass range from 100 to 150 times the mass of the Sun, and its luminosity is about four million times that of the Sun." This HDR image is constructed from 12 sets of exposures ranging from 1/8 sec ( to capture the bright centre of Eta Carinae ) through to 240 seconds. Total exposure time around 13 hours 17-19 March 2018 Image details: Objects in image: Hypergiant, Eta Carinae ( HD 93308 ) in the centre of the Homunculus Nebula Carina Nebula ( NGC 3372 ) Keyhole Nebula Open Star Clusters: - Trumpler 14, 15, 16 - Collinder 232 Field of view ..... 59' 18.2" x 39' 56.0" Image centre ...... RA: 10 45 01.762 Dec: -59 40 52.87 Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 17, 18 & 19 March 2018 ): 12 sets of sub-images with exposure duration for each set doubling ( 1/8s to 240s ) all at ISO250. ( 181 x 240sec + 10 to 20 each for the other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 12 sets HDR combination Pixinsight March 2018
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omega centauri A deeper look at Omega Centauri ( NGC 5139 )
MikeODay posted a topic in Imaging - Deep Sky
Update 16th June: I could not wait to tell people that I was just notified that my image of Omega Centauri will be published as a future NASA's Astronomy Picture of the Day ( APOD ) - my first ever I will update the thread when they publish. ................................. A deep look at Omega Centauri ( NGC 5139 ) This image is an attempt to look deeply into the the Omega Centauri globular cluster by using HDR techniques to record as many faint stars as I can whilst retaining colour and detail in the bright stars, including at the core ... ............. Reprocessed to bring out more faint stars and to produce a smother transition between brightness levels. New version ( 12 June 2017 ): Omega Centauri ( NGC 5129 ) ( please click / tap on image to see lager and sharper ) .......... Old version: Omega Centauri ( NGC 5129 ) ( please click / tap on image to see full size and sharper ) Image details: from www.nova.astrometry.net: Size: 58.6 x 39 arcmins, Centre: 13h 26 min 50.4 sec, -47deg 28' 39.1''. Orientation: up is -89.9 East of North ( ie. E^ N> ). Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1410mm f4.7. Mount: Skywatcher AZ Eq6 GT. Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 . Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels). No filter Long Exposure noise reduction off Location:. Blue Mountains, Australia. Moderate light pollution ( pale green zone on darksitefinder.com map ). Capture: 9 sets of sub-images with exposure duration for each set doubling ( 1s to 240s ) all at ISO800. Processing:. Calibration: master bias, master flat and no darks. Integration in 9 sets. HDR combination. Pixinsight May 2017- 40 replies
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Hi All, I realise that I could use a Polaris Finder app to do this, but I am having difficulty following the instructions to align Polaris in the SW Polarscope. Page 23 of the manual: "4. Adjust the date graduation circle first according to difference between the standard time meridian of your region and the observing site. For example, if you are in Prince Rupert, Canada which is 130 degrees West, then you have to turn the Date Graduation Circle to make the Time Meridian Indicator point to West 10 (which is 130 degrees - 120 degrees)". What does that mean? I see where they get the 130 from, it's the latitude of Prince Rupert, but what is the 120? (Thinks: 3 x 120 = 360). My location (Cardiff UK) is 3 degrees West of Greenwich, i.e -3, so where do I set the Time Meridian Indicator to? So far, when I try this, I end up with the polaris indicator 180 degrees out. (Hmmm, 180 degrees, could be significant). Any thoughts etc., Neil.
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Last night as i lay in bed i was looking out of the window at the only star in the sky i could see. It was above the silhouette of the rooftop of the house opposite my back garden (i live in the country in the UK). I noticed that, if i moved my head just a few inches to the right, the star disappeared. It also disappeared if i moved my head down. After a little experimentation i found the limits of where it was observable from, which was quite a small area. I opened the window to make sure it wasn't some kind of aberration of the glass, it wasn't, there were no slim tree branches obscuring it or anything. Why would a star become invisible to the eye just by moving the head a little? It wasn't cloud cover, since the 'viewing cone' stayed the same over the period of a half an hour as i was trying to puzzle this out. I used the skyview app to try and identify the star and the name looked like a reveresed 'r' and then Phe. I then fell asleep but woke up a couple of hours later and the star hadn't moved. I woke up again just before dawn and the star still hadn't moved. Will get the scope on it tonight.
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From the album: live polarex
hello this is one of my favourite telescope bluestar this star is taken with polarex telescope 102mm 1500mm also have video ..super this blue star is super-cool -
The Fighting Dragons of Ara ( NGC 6188 ) ( please click / tap on image to see larger ) The Fighting Dragons of Ara ( NGC 6188 ) Bright Nebula NGC 6188 and open cluster NGC 6193 are embedded 4,300 light years away in the Sagittarius arm of our Milky Way galaxy and can be seen with the naked eye south of Scorpius in the constellation of Ara. With powerful stellar winds and energetic ultra-violet radiation, massive stars sculpt the interstellar gas and dust of the nebula into wonderful shapes and cause the interstellar gas to brightly fluoresce. Closer to the hot young stars of the cluster, bright blue “sunlight” reflects off the clouds of gas and dust to produce the blue reflection nebulae seenin the image. Magnitude +5.19, RA 16h 41m 42s, Dec -48deg 48' 46". Approx. 3800 light years away. Image details: This is an HDR image constructed from exposures ranging from 2 seconds to 240 seconds in length. The aim was to capture the faint stars and details in the nebula whilst at the same time maintaining colour in the bright stars without clipping the highlights. Plate Solution: Resolution ........ 1.336 arcsec/px Rotation .......... 90.002 deg ( North is to the right ) Focal ............. 1475.57 mm Pixel size ........ 9.56 um Field of view ..... 58' 28.5" x 39' 0.8" Image center ...... RA: 16 40 09.903 Dec: -48 41 27.00 Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1410mm f4.7. Mount: Skywatcher AZ Eq6 GT. Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 . Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels). Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ). Capture ( 24 June 2017 ). 8 sets of sub-images with exposure duration for each set doubling ( 2s to 240s ) all at ISO800. 34 x 240s + 10 each @ 2s to 120s. Processing ( Pixinsight - 19 Aug 2017, 13 Jan 2018 ). Calibration: master bias, master flat and no darks. Integration in 8 sets. HDR combination. ......... This is a reprocessed version using the data I captured earlier in the year...
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“The Blue Bunny Nebula” .......... Edit: 27 Jan 2018 - updated again to try to draw more faint nebulosity out of the background; ( NGC 2359 - Thor’s Helmet ) ( please click / tap on image to see larger and without compression artefacts ( and double click on that image if you what to see it as I posted it ! ) ) ......... Edit: 24 Jan 2018 - stars a little brighter and tighter with no change to the rest of the image ( NGC 2359 - Thor’s Helmet ) ( please click / tap on image to see larger and without compression artefacts ( and double click on that image if you what to see it as I posted it ! ) ) ................. original: Thor's Helmet ( NGC 2359 ) in the constellation Canis Major Thor’s Helmet ( Duck Nebula, NGC 2359 ) ( please click / tap on image to see larger ) This HDR image shows the bright nebula Thor’s Helmet in a sea of colourful stars against a background of red from dust and HA emissions. The stars in this image range from the brightest ( bottom right, HD 56501 ) at magnitude +7.7 to around +20 or more. HDR capture and processing allows all of the stars to be portrayed in colour without any burnt-out highlights. The colours of the stars and nebula are as close as I can get them to their "true colours" by using a "daylight colour balance" and allowing for the extinction of blue-green due to atmospheric absorption/scattering ( mean altitude during capture ~ 60deg ). The blue star in the centre of the bubble of expanding stellar material is HD 56925 ( WR7 ) - a massive, unstable and short-lived Wolf-Rayet star that one day will detonate in a supernova. Image details: NGC 2359 Thor’s Helmet / Duck Nebula: Magnitude +11.5, RA (2000.0) 7h 15m 37s, Dec -13deg 12' 8", approx. 1800 light years away HD 56925 / Wolf-Rayet 7 ( WR7 ) ( blue 11.5 mag star at centre of “bubble” ) Haffner 6 ( open ster cluster centre left of image ) Plate Solution: Resolution ........ 1.318 arcsec/px Rotation .......... 0.00 deg ( North is up ) Focal ............. 1398.41 mm Field of view ..... 57' 40.8" x 38' 29.0" Image center ...... RA: 07 18 36.509 Dec: -13 11 53.38 Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1410mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 18 & 19 Jan 2018 ) 9 sets of sub-images with exposure duration for each set doubling ( 1s to 240s ) all at ISO 250. 116 x 240s + 5 each @ 1s to 120s Processing ( Pixinsight - 20 Jan 18 ) Calibration: master bias, master dark and master flat Integration in 9 sets HDR combination arcSinH stretch
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A deep look at Omega Centauri ( NGC 5139 ) edit: re-processed from the original exposures - April 2018 ........ previous version: Omega Centauri ( please click / tap on image to see larger and much sharper ) This image is an attempt to look deeply into the mighty Omega Centauri star cluster and, by using HDR techniques, record as many of its faint members as possible whilst capturing and bringing out the subtle colours of the stars, including in the core. ( re-processed from May 2017 subs - master dark added to workflow, new HDR / colour process workflow and stretched using ArcSinh ) Image details: Field of view ..... 58' 32.3" x 38' 55.6" Image center ...... RA: 13 26 50.290 Dec: -47 28 39.80 Orientation: East is up, North is to the right Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher AZ Eq6 GT Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.9um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( May 2017 ): 9 sets of sub-images with exposure duration for each set doubling ( 1s to 240s ) all at ISO800. Processing: Calibration: master bias, master flat and master dark Integration in 9 sets HDR combination ArcSinh stretch Pixinsight March 2018 Links: 500px.com/MikeODay photo.net/photos/MikeODay www.flickr.com/photos/mike-oday
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Also known as the Theta Carinae Cluster, The Southen Pleiades is a very bright open cluster in the Carina constellation. It was discovered by Abbe Lacaille during his visit to South Africa in 1752. Containing around 60 stars, IC 2602 shines with an overall magnitude of 1.9 and its brightest member is Theta Carinae with a visual magnitude of 2.7. This cluster of young blue stars is relatively close to us at "only" 479 light years. 5 May 2018 The Southern Pleiades ( IC 2602 ) in Carina ( please click / tap on image to see larger and sharper ) ......... Image details: Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.91um pixels) Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 5 May 2018 ): 14 sets of sub-images with exposure duration for each set doubling ( 1/30th sec to 240 sec ) all at ISO250. ( 22 x 240sec + at least 10 each forthe other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 14 sets HDR combination Pixinsight May 2018
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The Jewel Box ( NGC 4755 ) is an open cluster of mostly hot young blue-white stars that appears to the unaided eye as a bright 4th magnitude star close to the Southern Cross. Only visible from southern latitudes, the Jewel Box was first recorded by Nicolas Louis de Lacaille during his visit to South Africa in 1751 and was later described by Sir John Herschel as "a casket of variously coloured precious stones" - hence the name "Jewel Box". The Jewel Box open star cluster ( ngc 4755 ) in Curx ( please click / tap on image to see larger and sharper ) Please see here for image details.
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The Jewel Box ( NGC 4755 ) is an open cluster of mostly hot young blue-white stars that appears to the unaided eye as a bright 4th magnitude star close to the Southern Cross. Only visible from southern latitudes, the Jewel Box was first recorded by Nicolas Louis de Lacaille during his visit to South Africa in 1751 and was later described by Sir John Herschel as "a casket of variously coloured precious stones" - hence the name "Jewel Box". The Jewel Box Open Cluster ( ngc 4755 ) in the Crux constellation. ( please click / tap to see larger and sharper ) ........... Image details: Orientation: North is up Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ). Corrector: ASA 2" Coma Corrector Quattro 1.175x. Effective Focal Length / Aperture : 1470mm f4.7 Mount: Skywatcher EQ8 Guiding: TSOAG9 Off-Axis-Guider, Starlight Xpress Lodestar X2, PHD2 Camera: Nikon D5300 (unmodified) (sensor 23.5 x 15.6mm, 6016x4016 3.91um pixels) image Plate Solver script version 5.0 =========== Resolution ........ 0.586 arcsec/px Rotation .......... 0.000 deg Focal ............. 1375.43 mm Pixel size ........ 3.91 um Field of view ..... 58' 49.3" x 39' 17.8" Image center ...... RA: 12 53 40.040 Dec: -60 21 02.81 ========== Location: Blue Mountains, Australia Moderate light pollution ( pale green zone on darksitefinder.com map ) Capture ( 5 May 2018 ): 11 sets of sub-images with exposure duration for each set doubling ( 1/8th sec to 120 sec ) all at ISO250. ( 10 x 120sec + at least 10 each forthe other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 11sets HDR combination
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starscape A Cluster of Pearls in Centaurus ( NGC 3766 )
MikeODay posted a topic in Imaging - Deep Sky
The Pearl Cluster in Centaurus ( NGC 3766 ) - re-processed version ( clouded in for days now so I've been looking back through my old images and seeing if I can improve them ) The Pearl Cluster is an open cluster of mostly young blue stars approximately 5500 light years from Earth that is only visible from the Southern Hemisphere and shimmers like a cluster of pearls. ( Tap / click here to see my scrapbook page for the Pearl Cluster ) Details: NGC 3766 - RA 11h 37m, Dec -61deg 41' Skywatcher Quattro 10" f4 Newtonian telescope Skywatcher AZ Eq6 GT Mount Guiding: Orion Shortube 80 guidescope, Starshoot Autoguider, PHD2 Baader MPCC Mark 3 Coma Corrector Hutech IDAS D1 filter Nikon D5300 (unmodified) Field of view (deg) ~ 1.35 x 0.90 Combination of 55 images 30 sec @ ISO400. Pixinsight 13 Feb 16 re-processed 4 Dec 16 Links:https://500px.com/MikeODayhttp://photo.net/photos/MikeODay.. -
I'm working on a book about symbols of the 50 states. Delaware has an official state, called the Delaware State. It's reportedly in the constellation Ursa Major, but I haven't been able to find a picture that shows its precise location. I've found the following information online: The star TYC 3429-697-1 (9h 40m 44s; 48°14′2″, located to the east of θ Ursae Majoris and to the southwest of the "Big Dipper") has been recognized as the state star of Delaware, and is informally known as the Delaware Diamond.[ coordinates of right ascension 9h40m44s and declination 48°14’2”Coordinates of right ascension 9h40m44s and declination 48°14'2". Can anyone help me? My goal is to simply create a picture of the "Big Dipper" with the arrow pointing to the Delaware Diamond. Thank you.
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Hello all, I am trying to process data captured on friday during almost full moon, and I'm having a hell of a time of it.. Due to the full moon doing it's best sun impression my target was an open cluster (NGC 225 in Cassiopea), thinking it would be doable. I was using my 2" Explore Scientific CLS filter, my unmodded Nikon D7100 and captured 92 usable 45 second subs at ISO 400. Calibrated with bias and flat frames and stacked with linear fit clipping as the pixel rejection algorith. The mission for the night was not getting particularly good data, but getting decent tracking and round stars, something I have had lots of trouble with! Now that I am trying to process it, I find im dealing with some very nasty gradients / casts and I can't seem to get any good colors. An initial strech reveals a strong blue color cast/gradient that I can deal with in a number of ways. Linear fit DBE ABE followed by the usual: SCNR (green) Color Calibration No matter what I do I end up with the whole image being either really green or really red and not much else for color in any of the stars. I also think i burned out all the major stars by over saturation.. I know the CLS filter is going to wreak havoc on colors because it completely blocks parts of the spectrum, so maybe the CLS filter is just the wrong tool for the job? If anyone would like to show me what they can get from this data, and how (so preferably with PI) I would be really grateful. At the moment im thinking maybe the data is just really bad and not useable? Linked is the final integrated xisf (only xopped slightly): https://www.dropbox.com/s/nmxds87toc7vz51/integration.xisf?dl=0 -
Hi, I was asked on a Swedish forum to put an "Astronomical Dictionary" on my homepage. I have made a test page in an easy form. Astronomical related words linked to wikipedia. It aims to the beginners in astronomy so it should not be too complicated words. http://astrofriend.eu/astronomy/astronomical-dictionary/astronomical-dictionary.html Let me know if it's useful and and I shall add more words. /Lars
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I know that TheSkyX program has a feature to select an optimum guiding star for off-axis guiding. Are there alternative free programs that have a similar feature?
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6 hours of 30 second images. The gaps in the trails are from clouds drifting through Check the acoustic waveform in the reflection of Llyn Dinas anyone care to reverse engineer the waveform so I can hear what the star trail sounds like? and the timelapse from the same images, best watched on Youtube
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I took these two photos only seconds apart. The top bit I took secondly. I’m not sure what it is I’ve captured. But can anyone tell me what it could be??
