The Little Lagoon Nebula (NGC7538) (Andrew Klinger)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 7538

The Little Lagoon Nebula (NGC7538)

Using my Bubble and Lobster Claw data from Sept 2019, I made a huge crop edit on NGC7538. This emission nebula is small yet quite bright. It is often looked looked over because of its popular neighbor, The Bubble Nebula. In this false-color narrowband image the warmer tones are Hydrogen and Sulfur, while the blues are Oxygen.

Equipment:

OTA: William Optics GT81 w/0.8x reducer (382mm fl at f/4.7)

74mm aperture stop-down ring (brings scope to f/5.2)

Mount: Orion Sirius EQ-G (HEQ-5)

Guidescope: Orion 50mm guidescope

Guiding camera: Orion StarShoot Autoguider

Imaging camera: ZWO ASI1600MM-Cool

Accessories:

DeepSkyDad Autofocuser AF1

QHYCCD PoleMaster

Software:

SGP

PHD2

CdC

PixInsight

Acquisition:

Location: Flower Mound, TX (Bortle 7)

Dates: 8/19/19, 8/20/19, 9/3/19, 9/4/19, 9/5/19, 9/6/19, 9/7/19

Gain: 200 Offset: 50

Camera temp: -10C

Ha: 155x300" Astrodon 5nm

SII: 93x600" Astrodon 3nm

OIII: 89x600" Astrodon 3nm

Total integration time: 43hr 15min

64x darks per calibration (master from library)

30x flats per calibration

200x bias per calibration (master from library)

Narrowband imaging

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	Distinct awarded users	Total awarded images
Image of the day
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Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
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This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
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Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
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.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Basic success
Started	...
Astrometry.net job	3506500
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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The Little Lagoon Nebula (NGC7538)

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The Little Lagoon Nebula (NGC7538)

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Description

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