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Found 4 results

  1. 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
  2. Open star clusters Trumpler 14 & 16 and Collinder 232 with the Carina Nebula a very colourful backdrop Eta Carinae and star clusters Trumpler 14 & 16 and Collinder 232 ( please click / tap on image to see larger ( 1632 x 1632 ) and sharper image ) The stand out member of Trumpler 16 is the unstable hypergiant Eta Carina ( just to the left of the Keyhole Nebula ). A larger ( 3264 x 3264 ) version of this image can be found on my Flickr page. Capture and processing details can be found in this post.
  3. Hello fellow gazers I want to share a little project of mine I started a few days ago. Last week I opened another thread regarding a new EP which I ordered and @YKSE commented on it (again thank you for that! ). I saw his awesome signature and blandly copied it into my signature thinking to myself that I as of now had a Mission... a Mission to see and log all those beautiful clusters, nebulas and galaxies! As a well known sitcom actor would say... "CHALLENGE ACCEPTED!!" Then I ran into a few problems... first of all... where the hell would I find all the information I would need and secondly, the more pressing problem, how would I keep track of this huge amount of everything?! I really don't know how YKSE is doing it, or even others, but I thought to myself that a good ol' classic excel table would do the trick. I promptly started to gather the four catalogues in question, copied them into an excel tabel an HEY! there are MANY dublicates... Filtering them out isn't that easy since the information I found isn't completely to the point I would need it to be. So after a few days of manual crunching NGC numbers, here the actual result. The list includes a general number of the whole list, NGC / other number, the four catalogues, common name, type, distance, constellation, apparent magnitude and a "best to observe"-tab. To make things a little easier I included the NGC / other number to almost completely eliminate the duplicates. I also included a "best to observe"-tab to simply filter the catalogues by months. This way I can grab the list, filter it and promptly see what I could potentially see and what not. And the most important thing of all? A small cell where I can put an "x" if I've seen whatever I wanted to see. This goes allong with a date and location tab to round everything up. In some separate sheets I created a General Overview, the four separate catalogues and a Constellation sheet where I'll put some valuable information. The General Overview will be a sheet holding the logs information. For example I can immediately check how many objects I've seen of the Messier Objects or the Collinder Catalog and so on. I'll display a simple number like 56 / 110 Messier Objects and include a percentage diagram. To make things a little funnier I'll also add a general counter for the four catalogues, hence the previously mentioned general number of the whole list. After the list is complete I could se myself linking every entry to an online catalogue with more information and pictures for further research. If someone wants this list I'll gladly share it Have a great evening everyone, Abe
  4. Re-processed 3rd March 2018 - no luck so far getting any more data; I will try again when the moon goes away ....... With my unmodified D5300 DSLR, the HII nebula Gum 15 is barely brighter than the surrounding diffuse red glow that surrounds it and it all sits way down in the noise. I decided to share this small WIP version as I think it may be a while before I can get the data I need to impove it. This one has way too much noise ( and hence quite heavy noise reduction / smoothing ) as the detail is very faint and I needed a massive stretch to pull it out - more data will help with that I think. Seen small, from a very long way away, I don't think it is too bad Gum 15 and Open Cluster CR197 in Vela Unmodified Nikon D5300 Orion Optics CT12" Newtonian with ASA Coma Corrector ~ effective focal length 1400mm @ f 4.7 HDR image in 10 sets ( all at ISO 250 ) - 35 x 240 sec + 5 each for exposure durations from 0.5 to 120 seconds
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