NGC 1499, the California Nebula, Ha [section] (Stephen Garretson)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 10.77 · 584 Semiramis · IC 2005 · Sh2-220

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NGC 1499, the California Nebula, Ha [section]

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NGC 1499, the California Nebula, Ha [section]

This section of NGC 1499 centers on the star GSC 2369, 2206. I find it so interesting how getting in closer on some nebulae exposes structure, and this target is part of that exploration. [Using a centering star allows me to easily return to the same FOV to add data in subsequent sessions, as well as to slew to a bright focusing star as needed and then slew back to exactly where I was.] At present I monitor the temperature, and when has changed more than about 0.4° I check the focus with my Bahtinov mask. Having grown accustomed to this routine, I can genrally perform this check/adjustment in under two minutes, so a pretty simple and effective method of staying in focus. A new temperature compensating focuser is soon to be added, but that's for a different scope [8" CFRC].

This is only 2 hours of Ha at 3.5nm; as the target has low surface brightness I want to gather additional Ha data. Also, it's on a list of posible/probable targets that contain H-beta data, so I will experiment with that filter. I had just started a run of H-beta on 9, Nov. when the clouds slammed the door shut on the sky...so it goes...I'll be back.

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Status	Advanced success
Started	...
Astrometry.net job	2361359
PixInsight job	Q9IM2JIVKOV2APPUFG5GTVD8BDLHVJCJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h59m45s.63
RA (top/left)	04h02m08s.18
RA (top/right)	04h02m27s.40
RA (bottom/right)	03h57m20s.58
RA (bottom/left)	03h57m06s.73

Dec (center)	+36°43′20″.6
Dec (top/left)	+36°01′05″.6
Dec (top/right)	+37°22′54″.9
Dec (bottom/right)	+37°25′22″.5
Dec (bottom/left)	+36°03′33″.0

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NGC 1499, the California Nebula, Ha [section]

NGC 1499, the California Nebula, Ha [section]

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NGC 1499, the California Nebula, Ha [section]

NGC 1499, the California Nebula, Ha [section]

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