California Nebula through a Narrowband Filter (Avinash Singh)

California Nebula through a Narrowband Filter

The California Nebula (aka NGC 1499) is an emission nebula located in the constellation of Perseus. The nebula got its name due to its resemblance with the golden state of California. The nebula is powered by a massive O7-type star, known as Xi Persei, and most of its observed emission is due to the ionized hydrogen gas.

The declination of the California Nebula matches the latitude of the state of California, thus it transits at the zenith of an observer that is located in central California. Xi Persei, the star responsible for powering the nebula, is located just above the nebula.

The dual narrowband filter isolates H-alpha, H-beta, and O III Emission Lines. The bandwidths are 24 nm for O III and H-beta, and 10 nm for Ha. Maximum Transmission is roughly around 90%.

Equipment Used :

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Camera : Nikon D7200 (Stock, Unmodified)

Telescope : WO RedCat 51 Apochromatic Refractor, 250mm, f/4.9

Tracker : iOptron Sky Guider Pro (Not Guided)

Tripod : Amazon Basics 70 inch Tripod

Filter : Optolong L-eNhance 2" Light Pollution Filter

Intervalometer : Neewer Digital Timer Remote Shutter Release Trigger

Acquisition Details :

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Sub-Exposure : 60.9 seconds, ISO 5000, 250 mm, f/4.9

Lights : 101

Flats : 36

Darks : 8

Bias : None

Total Integration Time : 1 hr 42.5 mins

Software :

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Stacking : Deep Sky Stacker v4.2.5

Processing : Adobe Photoshop CC 2019

Location :

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Nainital, Uttarakhand, India (Bortle 4)

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	Distinct awarded users	Total awarded images
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Top picks
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Distribution of subject types

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	Image of the day	Top pick	Top pick nominations	Total submitted
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Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
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