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Found 6 results

  1. Nebulae and Clusters in the North East Quadrant of the Small Magellanic Cloud ( Tucana Constellation ) ( Contains: NGC 292, 299, 306, 330, 346, 361, 371, 395, 411, 416, 422 & IC 1611, 1612, 1624, 1641 ). The Small Magellanic Cloud (SMC) is a "small" spiral galaxy about 7000 light years in diameter and is one of our near neighbours. At 'only' around 200,000 light years distance, it shines brightly in the southern sky and is clearly visible to the naked eye even in moderately ligh polluted skies. Links: https://500px.com/MikeODay http://photo.net/photos/MikeODay Details: Image centre ~ RA 1h 2m, Dec -72deg 2' Skywatcher Quattro 10" f4 Newtonian Skywatcher AZ Eq6 GT Mount Orion Short Tube 80mm guide scope & auto guider PHD2 Baader MPCC Mark 3 Coma Corrector & UHC-S 'nebula' filter Nikon D5300 (unmodified) Long exposure noise reuduction on Field of view (deg) ~ 1.35 x 0.90 38 x 200 sec ISO 800 over two nights Pixinsight & Photoshop 11 & 12 October 2015 (re-processed 9 Apr 2016 )
  2. Tarantula Nebula ( NGC 2070 ) in the Large Magellanic Cloud ( LMC ) Re-processed to tweak colour balance and bring out a little more faint detail: New version: Original: ( click/tap on image to see full size - the above compressed version looks a little soft; the full size version is sharper ) The Tarantula Nebula ( NGC 2070 ) is the largest and brightest emission nebula in the nearby irregular galaxy, the Large Magellanic Cloud ( LMC ). At a distance of 160,000 light years away from us, the Tarantula Nebula is so bright that it would cast shadows on the Earth if were as close to us as the Orion Nebula in our galaxy. First image with new telescope and autoguider/setup. Links: 500px.com/MikeODay photo.net/photos/MikeODay Details: Nebulae: NGC 2070 Tarantula Nebula NGC 2048 NGC 2060 NGC 2077. Open clusters: NGC 2042 NGC 2044 NGC 2050 NGC 2055 NGC 2091 NGC 2093 NGC 2100 Image centre RA 5h 38m 57.3s, Dec -69deg 20' 36.6" (nova.astrometry.net) Field of view (arcmin): 58.7 x 39.2 Scale (full size image) 0.585 arcsec/pixel. Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, FL1200mm, 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) Filter: none Exposures: 14 x 240 sec ISO400 12 x 120 sec ISO400 10 x 60 sec ISO400 11 x 60 sec ISO200 10 x 60 sec ISO100 10 x 30 sec ISO100 Pixinsight & Photoshop 20 December 2016
  3. Tarantula Nebula ( NGC 2070 ) in Large Magellanic Cloud ( LMC ) by Mike O'Day. The Tarantula Nebula ( NGC 2070 ) is the largest and brightest emission nebula in the nearby irregular galaxy, the Large Magellanic Cloud ( LMC ). At a distance of 160,000 light years away from us, the Tarantula Nebula is so bright that it would cast shadows on the Earth if were as close to us as the Orion Nebula in our galaxy. New version ( April 9 ): ( please click / tap on image to see larger and sharper image ) ............ Older versions: And here it is re-processed to try to reduce the red background ( due to light pollution I think ) without impacting the colour of the stars too much ( please click / tap on image to see larger and sharper ) Details: Nebulae: NGC 2070 Tarantula Nebula NGC 2048 NGC 2060 NGC 2077 Open clusters: NGC 2042 NGC 2044 NGC 2050 NGC 2055 NGC 2091 NGC 2093 NGC 2100 Image centre ... (nova.astrometry.net) Field of view (arcmin): ... 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). Filter: none. Exposures: 100 sub exposures ranging from 1s 100ISO to 240Sec 400ISO HDR processing of 5 sets of images Pixinsight & Photoshop 20 December 2016 / April 2017
  4. NGC 2014 and Dragon's Head nebula in the Magellanic Cloud ( LMC ) not far from the Tarantula Nebula by Mike O'Day ( 500px.com/MikeODay ). This image shows multiple bright nebula and star clusters in an area adjacent to the The Tarantula Nebula ( NGC 2070 ) in the nearby irregular galaxy, the Large Magellanic Cloud ( LMC ). The largest of these are the bright pink nebula in the mid-right part of the image ( NGC 2014 ) and the blue nebula in the lower middle ( NGC 2030 ). ..... Updated image - reprocessed to impove colour balance ( April 15th ) ( please click / tap on image to see it larger and sharper ) .... Original: ( click on image to see larger and clearer ( grrr... image compression in version above )) ---------- This is the first image captured as part of a new image capture and processing workflow I am trying out... Roger Clark ( http://www.clarkvision.com/articles/index.html ) has a number of articles addressing colour processing and the performance of modern DSLR sensors. The "take homes" for me have been: 1. With a modern sensor ( one with on-sensor dark current suppression technology ) one may not need to capture dark frames ( in order to remove the now non-significant pattern noise ). 2. "Correct" white balance processing should start by using "daylight" RBG channel multipliers ( to get the star colour 'right') and any histogram adjustment to improve white balance of darker parts of the image should involve aligning the left side of histogram curves ( ie. not the peaks ) So, the workflow to produce the image above involves calibraiton with Superbias & Master Flat but no dark frame subtraction (neither post nor in-camera). Roger Clark speaks of using a "bad pixel map" as the basis of reducing hot pixels. I have not figured out how to produce one yet. However, with a little bit of dithering during guiding ( and the very busy image ) the hot pixels that are in the image below are not too overwhelming. With regard to colour balance; I tried using the "daylight" factors reported by the camera but these resulted in an image and stars that were quite blue. This image was based on the factors reported by DXOMark for the Nikon D5300 ( R x 2.12, G x 1, B x 1.49 ( D50 standard )). This was better but I still felt the need for a final tweak in Photoshop ( colourBalance Highlights +15 Cyan/Red, -5 Magenta/Green ) to improve the colour in the stars and mid-tones. { DXOMark "white balance scales" for D5300 found at: https://www.dxomark.com/Cameras/Nikon/D5300---Measurements on the "color response" tab } --------- Details: Bright Nebulae: NGC 2014 ( upper right, pink) size 30 x 20 arcmin Mag +8 NGC 2020 size 2.0 arcmin ( small blue-green oval nebula ) NGC 2030 NGC 2032 ( Dragon's Head nebula - blue, central bottom of image ) NGC 2035 size 3.0 x 3.0 arcmin NGC 2040 size 3.0 x 3.0 arcmin Open clusters: NGC 2004 size 2.7 arcmin Mag +9.6 NGC 2011 size 1 arcmin Mag +10.6 NGC 2021 size 0.9 arcmin Mag +12.1 Annotated : Image centre RA 05h 33m 32.362s, Dec -67° 32' 18.145" (nova.astrometry.net) Orientation: up is west, right is South Field of view (arcmin): 58.8 x 39.2 Scale (full size image) 0.585 arcsec/pixel Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 120mm, 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) Format: 14bit NEF Noise reduction: off Filter: none HDR combination of seven sets of exposures (20 & 22 Feb 2017): 58 x 240 sec ISO 800 8 x 120 sec ISO 800 8 x 60 sec ISO 800 8 x 30 sec ISO 800 8 x 14 sec ISO 800 8 x 7 sec ISO 800 8 x 3 sec ISO 800 Pixinsight: 26 Feb 2017 Links: 500px.com/MikeODay photo.net/photos/MikeODay
  5. ( click tap on image to see larger and sharper ) This image shows multiple bright nebula and star clusters in an area adjacent to the the Tarantula Nebula ( NGC 2070 ) in the nearby irregular galaxy, the Large Magellanic Cloud ( LMC ). The largest of these are the bright pink nebula in the upper right part of the image ( NGC 2014 ) and the blue nebula in the lower right ( NGC 2030 ). Details: Bright Nebulae: NGC 2014 ( upper right, pink) size 30 x 20 arcmin Mag +8. NGC 2020 size 2.0 arcmin NGC 2030 ( lower right, blue ). NGC 2032 . NGC 2035 size 3.0 x 3.0 arcmin NGC 2040 size 3.0 x 3.0 arcmin Open clusters: NGC 2002 size 2 arcmin Mag +10.1 NGC 2004 size 2.7 arcmin Mag +9.6 NGC 2006 size 1 arcmin Mag +11.5 NGC 2011 size 1 arcmin Mag +10.6 NGC 2021 size 0.9 arcmin Mag +12.1 NGC 2027 size 0.7 arcmin Mag +11.9 NGC 2034 NGC 2041 size 0.7 arcmin Mag +10.4 Image centre RA 05h 33m 25.583s, Dec -67° 18' 02.586" (nova.astrometry.net) Field of view (arcmin): 58.8 x 39.2 Scale (full size image) 0.585 arcsec/pixel Telescope: Orion Optics CT12 Newtonian ( mirror 300mm, fl 1200mm, f4 ) Corrector: ASA 2" Coma Corrector Quattro 1.175x Effective Focal Length / Aperture : 1410 mm 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) Filter: none HDR combination of four sets of exposures: 9 x 300 sec ISO 200 4 x 120 sec ISO 200 4 x 120 sec ISO 100 4 x 60 sec ISO 100 Pixinsight & Photoshop 29 January 2017 link: 500px.com/MikeODay
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