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Showing results for tags '3766'.
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21st April: Re-processed to better show the colour of the fainter stars ... ....... Shimmering like a pearl to the naked eye, this open cluster of mostly young blue stars ( known as the "Pearl Cluster" ) is approximately 5500 light years from Earth and was discovered by Abbe Lacaille in 1752 from South Africa. This HDR image is constructed from 11 sets of exposures ranging from 1/4 sec ( to capture the centre of the brighter stars ) through to 240 seconds ( for the fainter stars of the Milky Way ). Total exposure time was around 5 hours. A Cluster of Pearls in the Southern Skies ( NGC 3766 " The Pearl Cluster" ) ( please click / tap on image to see larger and sharper - a full size image can be found here ) 12 April 2018 ..... Image details: Field of view ..... 58' 49.8" x 39' 36.4" Image center ...... RA: 11 36 03.890 Dec: -61 35 30.17 Resolution ........ 0.586 arcsec/px ( full size image ) 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 ( 12 April 2018 ): 11 sets of sub-images with exposure duration for each set doubling ( 1/4s to 240s ) all at ISO250. ( 70 x 240sec + 10 each forthe other durations ) Processing: Calibration: master bias, master flat and master dark Integration in 11 sets HDR combination Pixinsight April 2018 -
Astrophotography Scrapbook Vol. 1 Cover Page Lagoon Nebula in Sagittarius ( Messier 8, NGC 6523 ) The Fighting Dragons of Ara ( NGC 6188 ) War and Peace in Scorpius ( NGC 6357 ) Spiral Galaxy NGC 6744 in Pavo Ptolemy's Cluster in Scorpius ( Messier 7, NGC 6475 ) A Million Stars in the Deep South ( NGC 104, 47 Tucanae ) A Wishing Well in Carina ( NGC 3532 ) A Beehive in the Southern Sky ( NGC 2516 ) The Sliver Coin in Sculptor ( NGC 253 ) The Great Nebula in Orion ( Messier 42, NGC 1976 ) A Cluster of Pearls in Centaurus ( NGC 3766 ) - new 5 Dec resources: Scrapbook Template ------------------------------------- When I show my astrophotography images to my friends and family they invariably want to know what they are looking at. This led me to wonder if there was a way I could display my images on a single page together with a few notes on the target object as well as few technical details of the capture for those who might be interested. What I came up with a "scrapbook" like page that combines all of these three elements in a single PDF sheet ( or jpeg image) that ultimately I might combine together to form a PDF book that I can share online or send to friends and family. In the meantime, I thought I might post in this thread each page of my work-in-progress towards volume 1 of my Astrophotography Scrapbook. Any and all comments, observations, suggestions and constructive criticisms will be warmly received. Cheers Mike ps. The pages have been sized to fit full screen on an IPAD
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Shimmering like a pearl to the naked eye, this open cluster of mostly young blue stars ( known as the "Pearl Cluster" ) is approximately 5500 light years from Earth and was discovered by Abbe Lacaille in 1752 from South Africa. A Cluster of Pearls in the Southern Skies ( NGC 3766 " The Pearl Cluster" ) ( please click / tap on image to see larger and sharper - a full size image can be found here ) This HDR image is constructed from 11 sets of exposures ranging from 1/4 sec ( to capture the centre of the brighter stars ) through to 240 seconds ( for the fainter stars of the Milky Way ). Total exposure time was around 5 hours. ..... Image details can be found here
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Another starscape from down under - this time the Pearl Cluster ... ( click on image to see full size ) The Pearl Cluster in constellation Centaurus ( NGC 3766 ) by Mike O'Day ( 500px.com/MikeODay ). The Pearl Cluster, visible from the Southern Hemisphere, shimmering like a pearl to the naked eye, is an open cluster of mostly young blue stars approximately 5500 light years from Earth. Links: https://500px.com/MikeODay http://photo.net/photos/MikeODay Details: NGC 3766 RA 11h 37m, Dec -61deg 41' Skywatcher Quattro 10" f4 Newtonian 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