NGC 1499 (California Nebula) Widefield with Dust

NGC 1499
All Images Copyright Steve Cannistra

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9.5 x 6.3 degrees
RA (J2000): 03h 53m 195s
Dec (J2000): +34 degrees 18' 45"
Position Angle: 334 degrees

This is a 5 hour exposure of NGC 1499, a large hydrogen emission nebula in Perseus, taken through the Samyang 135mm f2.0 lens (stopped down to f3.1 using step down rings) and a full-spectrum modified Canon T7i DSLR.  NGC 1499 is one of a few nebulae that emit strongly in both H alpha (red) and H beta (blue), with little OIII emission, skewing the usual red color typical of emission nebulae towards the blue.  The star responsible for exciting hydrogen emission from the nebula is thought to be Xi Persei, a "runaway star" that is described on Rob Gendler's website.

Photographic Details:

Dates:  October 27 and 29, 2022.
Scope:  Samyang 135mm f2.0 prime lens on the Skywatcher Star Adventurer portable tracker.
Autoguider:  None.
Camera:  Self-modified Canon T7i (full spectrum).

Astronomik CLS-CCD clip on EOS filter.
Exposures:  60 second subs for a total of 5 hours data after discarding poorly tracked subs (due to periodic error).
Processing:  PixInsight for Preprocessing (WBPP script) .  Photoshop for Postprocessing.

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