Monthly Archives: February 2016

Wide-field image of IC1318 in Cygnus

IC1318-BiColour-v1The bright star projected at bottom centre of this image is the supergiant Gamma Cygni (aka Sadr). It is located only 750 light years away and so is not directly associated with the vast emission clouds of the Cygnus complex which are much more distant at 5,000 light years. Above Gamma Cygni and shaped like two luminous wings divided by a long dark dust lane is the nebula complex IC1318 commonly referred to as the Butterfly Nebula.

This image was obtained with my TS60ED F/4.3 APO refractor and illustrates what a great instrument it is for acquiring deep wide-field images of extended objects.

Right ascension: 20h 27m 13.1s | Declination: +40° 09′ 27.8″ | Distance: 5,000 Light Years
Field of view: 234 x 176 arcmin

Camera: QSI 583wsg
Optics: TS Photoline TS60ED F/4.3 APO with Photoline x0.79 reducer
Guiding: Off-axis with Lodestar guider
Filters: Baader Ha (7nm), OIII (8.5nm)
Exposures: Ha 21 x 20 min, OIII 21 x 20min
Total exposure: 14 hours
Image composition: Cannistra Modified Bicolour Narrowband Technique
Scale: 4.2 arcsec/pixel
Image acquired: Over seven nights between 30th July and 18th September 2015

Image capture with MaxIm DL, FocusMax, ACP; Image processed with MaxIm DL and Photoshop CC 2014

IC1396 – Combined Ha and OIII bicolour composite

IC1396-BiColThis is a colour enhanced version of the Hydrogen Alpha image of IC1396 in Cepheus acquired on 17th July 2015. The image is made up of an additional four hours of Ha data and combined with 6 hours of OIII using the Cannistra Modified Bicolour Narrowband Technique.

Right ascension: 21h 39m 55.3s | Declination: +57° 36′ 48.8″ | Distance: 2,400 Light Years
Field of view: 234 x 176 arcmin

Camera: QSI 583wsg
Optics: TS Photoline TS60ED F/4.2 APO with Photoline x0.79 reducer
Guiding: Off-axis with Lodestar guider
Filters: Baader Ha (7nm), OIII (8.5nm)
Exposures: Ha 17 x 20 min, OIII 19 x 20min
Total exposure: 12 hours
Image composition: Cannistra Modified Bicolour Narrowband Technique
Scale: 4.2 arcsec/pixel
Image acquired: 17th July and four nights between 27th September – 3rd October 2015

Image capture with MaxIm DL, FocusMax, ACP; Image processed with MaxIm DL and Photoshop CC 2014

IC1318 – Butterfly Nebula (Part B)

IC1318B-Ha-v1bcLL4IC1318 is a giant HII cloud and one of the brightest among all the emission clouds in the Cygnus complex. The cloud is bisected by a thick obscuring dust lane to create two parts that have been compared to the wings of a butterfly which has led to its popular name. This image shows detail of the dark smoke-like whorls of dense dust and gas that obscure the bright nebulosity of the northern wing (Part B) of the Butterfly Nebula.

Right ascension: 20h 24m 55s | Declination: +40° 33′ 25″ | Distance: 5,000 Light Years
Field of view: 42 x 28 arcmin

Camera: SBIG ST-10XME
Telescope: APM 152-1200ED F/7.9
Guiding: Starlight Xpress Active Optics SXV-LF-AO
Filters: Astrodon Ha (3nm), OIII (3nm)
Exposures: Ha 17 x 20 min, OIII 19 x 20 min
Total exposure: 12 hours
Image composition: Cannistra Modified Bicolour Narrowband Technique
Scale: 1.15 arcsec/pixel
Image acquired: Over 5 nights between 2nd July – 8th August 2015

Image capture with MaxIm DL, FocusMax, ACP; Image processed with MaxIm DL; Photoshop CC 2014

 

Fleming’s Triangular Wisp (aka Pickering’s Triangle)

PickeringsTriangle-v01pPart of the larger Veil Nebula complex, these glowing filaments of ionised hydrogen are the result of shock waves from a massive supernova explosion estimated to have occurred around 5,000 years ago. The nebula was discovered photographically by Williamina Fleming in 1904 but following the custom of the day the find was credited to her superior Edward Pickering, director of the Harvard College Observatory, and catalogued as NGC 6979.

The image was taken over three nights in October 2015 from my observatory in Somerset with my APM six inch refractor operating at its native focal ratio of F/7.9.

Right ascension: 20h 48m 21s | Declination: +31° 29′ 24″ | Distance: 2,600 Light Years
Field of view: 42 x 28 arcmin

Camera: SBIG ST-10XME
Telescope: APM 152-1200ED F/7.9
Guiding: Starlight Xpress Active Optics SXV-LF-AO
Filters: Astrodon Ha (3nm)
Exposures: Ha 14 x 20 min
Total exposure: 4.6 hours
Scale: 1.15 arcsec/pixel
Image acquired: 2nd, 3rd & 7th October 2015

Image capture with MaxIm DL, FocusMax, ACP; Image processed with MaxIm DL; Photoshop CC 2014