NGC 1499 California Nebula
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scott pellet
Details are as follows:
Date Images Acquired: November 18, 2020 All sub-frames at 240 seconds, 15 Lum, 10 R, 10 G, 10 B Scope : 6" Astro-Physics EDFS, normally at f/5, but focal reduced to f/3.75, which is a FL=813 mm Camera QSI 683 ws-8 Focuser and Field Rotator: WR35 Moonlite Nitecrawler Mount: Astro-Physics 1200 GTO w/ CP3 controller Guide Scope: Astro-Physics 80mm f/11.25 Guide Camera: ZWO ASI 120 MM-S Acquisition software: Sequence Generator Pro Guiding software: PHD2 Post-Processed using PixInsight This object is big. Even at this short focal length, I could only capture a portion of it. This is one of only about 3 objects that a Hydrogen Beta filter is helpful for visually observing. I do not have and HB filter for astro-imaging. Next time I image it. I will include Hydrogen Alpha filtered data. From Wikipedia: The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hα filter (isolates the Hα line at 656 nm) or Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies.[1] It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, Xi Persei The California Nebula was discovered by E. E. Barnard in 1884
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Robert Pitt
Beautiful Scott!
From: main@bas-astro.groups.io <main@bas-astro.groups.io> On Behalf Of scott pellet
Sent: Monday, January 11, 2021 5:52 PM To: main@bas-astro.groups.io Subject: [bas-astro] NGC 1499 California Nebula
Details are as follows: The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hα filter (isolates the Hα line at 656 nm) or Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies.[1] It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, Xi Persei The California Nebula was discovered by E. E. Barnard in 1884
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Bob Sieber
Scott, thanks for sharing. Excellent work. Glad you are having fun. All the best,
Bob
Sent from Mail for Windows 10
From: scott pellet
Details are as follows: The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hα filter (isolates the Hα line at 656 nm) or Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies.[1] It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, Xi Persei The California Nebula was discovered by E. E. Barnard in 1884
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James Moore
That is beautiful, Scott! Thanks for sharing.
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Fred Rains
Scott, This is a great image! Do you mind if we post it on the Club Facebook page? Thanks and Happy New Year, Fred
On Monday, January 11, 2021, 05:52:31 PM CST, scott pellet <shpellet@...> wrote:
Details are as follows: Date Images Acquired: November 18, 2020 All sub-frames at 240 seconds, 15 Lum, 10 R, 10 G, 10 B Scope : 6" Astro-Physics EDFS, normally at f/5, but focal reduced to f/3.75, which is a FL=813 mm Camera QSI 683 ws-8 Focuser and Field Rotator: WR35 Moonlite Nitecrawler Mount: Astro-Physics 1200 GTO w/ CP3 controller Guide Scope: Astro-Physics 80mm f/11.25 Guide Camera: ZWO ASI 120 MM-S Acquisition software: Sequence Generator Pro Guiding software: PHD2 Post-Processed using PixInsight This object is big. Even at this short focal length, I could only capture a portion of it. This is one of only about 3 objects that a Hydrogen Beta filter is helpful for visually observing. I do not have and HB filter for astro-imaging. Next time I image it. I will include Hydrogen Alpha filtered data. From Wikipedia: The California Nebula (NGC 1499) is an emission nebula located in the constellation Perseus. It is so named because it appears to resemble the outline of the US State of California on long exposure photographs. It is almost 2.5° long on the sky and, because of its very low surface brightness, it is extremely difficult to observe visually. It can be observed with a Hα filter (isolates the Hα line at 656 nm) or Hβ filter (isolates the Hβ line at 486 nm) in a rich-field telescope under dark skies.[1] It lies at a distance of about 1,000 light years from Earth. Its fluorescence is due to excitation of the Hβ line in the nebula by the nearby prodigiously energetic O7 star, Xi Persei The California Nebula was discovered by E. E. Barnard in 1884 Attachments:
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