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Chris Howard
1,608 followers -
Author, artist, software engineer, lover of the sea
Author, artist, software engineer, lover of the sea

1,608 followers
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I’m in Philadelphia for a meeting. Unfortunately this is about as close as I’m likely to get to the Center.
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Constellation Orion (and that's Sirius in the lower left). I was out in the cold last night, with the Nikon D750 (24mm, 30 sec. exposure, ISO 800). Love that Hampton sky glow.
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Remember that time we rocketed out to Enceladus to catch the JPL hockey team play the Martians?
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There's a beautiful moon out there tonight! (Nikon D750, Nikkor 180mm f/2.8 lens)
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The three central and brightest (low magnitude) stars in the open star cluster M45, called The Pleiades or The Seven Sisters: Alcyone (upper middle), Maia (right), and Merope (left). The light of the stars in the Pleiades pass through and illuminate a cloud of dust in the interstellar medium. (8 x 5 minute exposures, 18 dark frames - William Optics GT-81 478mm FL, Atik 414EX Monochrome CCD, Baader luminance filter, CEM25P EQ mount). http://SaltwaterWitch.com/astronomy
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Color version of M81 (Bode's Galaxy) in the constellation Ursa Major (Big Dipper). From another set of subs I shot at 4am--this time with the color QHY CMOS camera, QHY5III178. Info: 21 x 300 sec. with 20 dark frames, QHY5III178 color CMOS, William Optics GT-81, CEM25P EQ mount, WO 50mm guidescope with ZWO ASI120S-MM guide cam, INDI/KStars/Ekos observatory control.
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IC 405--"Flaming Star Nebula" in the constellation Auriga, centered on the mag. +6 star AE Aurigae. It's relatively close to us, at about 1,500 light-years. This set of subframes covers the center of the fairly large nebula, which measures 37 x 19 arcminutes. (6 x 1200 second subs in Ha, O3, S2, taken with my current main setup: Atik414Ex mono CCD, William Optics GT-81, CEM25P EQ mount, WO 50mm guidescope with ZWO ASI120S-MM guide cam, INDI/KStars/Ekos observatory control).
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M81 (Bode's Galaxy) and M82 (Cigar Galaxy) in the constellation Ursa Major (Big Dipper). Info: 15 x 120 sec. with 10 dark frames, Atik414Ex mono CCD, William Optics GT-81, CEM25P EQ mount, WO 50mm guidescope with ZWO ASI120S-MM guide cam, INDI/KStars/Ekos observatory control.
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NGC 281 (IC 11, Sh2-184) "Pacman Nebula" in the constellation Cassiopeia. More narrowband imaging, although the moon is waning, and didn't even make into the sky until the early morning hours. I had completed the subs for NGC 281 by 1am, and had scheduled some narrowband exposures of IC 405, Flaming Star Nebula. (subframe info: 6 x 1200 second Ha, 5 x 1200 sec OIII & SII with 16 dark frames, Atik414Ex mono CCD, Astronomik 6nm Ha, OIII, SII, William Optics GT-81, CEM25P EQ mount, WO 50mm guidescope with ZWO ASI120S-MM guide cam, INDI/KStars/Ekos observatory control). http://saltwaterwitch.com/astronomy
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I finally made some time to process one of the image sets I shot on October 2, and here's one result: narrowband of the central region of emission nebula IC 1805, the Heart Nebula, which is only 7500 lightyears away in the constellation Cassiopeia. (It's almost in our backyard!) I used the "Hubble Palette", mapping the separate hydrogen alpha, oxygen, and sulfur image channels to RGB channels (SII = Red, Ha = Green, OIII = Blue) in the final. (subframe info: 4 x 1200 second Ha, 4 x 600 sec OIII & SII with 2x2 binning, Atik414Ex mono CCD, William Optics GT-81). I'm not entirely happy with this one, but good enough to post.
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