Reflection-Emission Nebula IC 4603 ( Paul Lloyd )

Celestial hemisphere: Southern · Constellation: Ophiuchus (Oph) · Contains: HD147701 · HD147889 · IC 4603 · LBN 1109 · LDN 1681 · LDN 1686 · LDN 1688 · LDN 1690 · LDN 1692

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Reflection-Emission Nebula IC 4603

Imaging Telescopes Or Lenses: Askar 107PHQ
Imaging Cameras: ZWO ASI294MC Pro
Mounts: Sky-Watcher EQ6-R Pro
Accessories: ZWO ASIAIR Plus
Software: Adobe Photoshop Elements · Pleiades Astrophoto PixInsight

RA center: 16h25m23s.27

DEC center: -24°27′54″.10

Pixel scale: 4.257 arcsec/pixel

Orientation: -1.419 degrees

Field radius: 0.863 degrees

WCS transformation: thin plate spline

More info:Open

Resolution: 842x1191

File size: 374.4 KB

Locations: Laurieton, NSW Australia, West Haven, NSW, Australia

Data source: Backyard

The rho Ophiuchi Complex is a huge gas and dust region spanning the borders of Scopius and
Ophiuchus. Numerous regions within this complex have been identified and are highly active in
star formation. This nebula lies near its centre and is ~420ly away. The blue regions of the nebula
are being illuminated by the very hot, class B3 star at the centre of the field. In addition, the nearby,
much brighter red giant star, Antares (α Sco), is illuminating these gas and dust clouds with its reddish
light. The light is also scuplturing the cloud into fantastic shapes. To add to the mix, many dark nebulae
(gas/dust clouds that are not being illuminated) are present.

Telescope: Askar PHQ107 refractor, f=750mm
Camera: ZWO ASI294MC Pro, 36 x 300 sec, no filter
Bortle 3-4 sky, moonless
Field of View: approx. 1º 24’ x 1º 00’
Image processed and prepared in PixInsight and Photoshop Elements.

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

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
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds

Distribution of data sources

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
Traveller
Own remote observatory
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.
Dismissals 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	Advanced success
Started	...
Astrometry.net job	8409058
PixInsight job	N4CCMMHKKQTNIGBB41R3LDDYR0VWJ69T
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h25m23s.27
RA (top/left)	16h27m29s.10
RA (top/right)	16h23m08s.17
RA (bottom/right)	16h23m15s.86
RA (bottom/left)	16h27m41s.11

Dec (center)	-24°27′54″.10
Dec (top/left)	-23°44′52″.5
Dec (top/right)	-23°46′22″.10
Dec (bottom/right)	-25°10′50″.3
Dec (bottom/left)	-25°09′07″.8

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Reflection-Emission Nebula IC 4603

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Image Index:

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Reflection-Emission Nebula IC 4603

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