RHO OPHIUCHI NEBULA - IC 4604 (Drew Evans)

Celestial hemisphere: Southern · Constellation: Ophiuchus (Oph) · Contains: 5 Oph · 5 rho Oph · B42 · HD147681 · HD147888 · HD147932 · IC 4604 · LBN 1111 · LBN 1112 · The star ρ Oph · rho Oph Nebula

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RHO OPHIUCHI NEBULA - IC 4604

Powered byPixInsight

RHO OPHIUCHI NEBULA - IC 4604

RHO OPHIUCHI NEBULA - IC 4604

Rho Ophiuchi itself is a multiple star system visible in the center of the blue reflection nebula. The star system, located only 360 light years away, located in the constellation of Ophiuchus.

With an effective surface temperature of 6,873.50 K, it is about 164 times more luminous than the Sun.

This image was taken over the span of several evenings in May, totaling just under 6 hours of data acquisition.

OTA: Sharpstar SC260 (260mm f/5, 1300mm focal length)
Mount: iOptron CEM120
Camera: ZWO ASI2600MM Pro
Gain: 100
Cooling Temperature: -10 degrees celsius

Filters:
Chroma L⚪ 30s x 140
Chroma R🔴 30s x 180
Chroma G🟢 30s x 189
Chroma B🔵 30s x 163
5.6 hours total total acquisition time

Auto-guiding: ZWO ASI174MM Mini and ZWO OAG-L
Auto-focusing: ZWO EAF
Control: ZWO ASIAIR Pro

Calibrated in Astro Pixel Processor with flats, darks and dark flats. Processed in Pixinsight and Lightroom.

Location: Bortle Class 2 skies outside Flagstaff, Arizona

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
Landscape

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.
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	Advanced success
Started	...
Astrometry.net job	7930270
PixInsight job	ZUEK10C9L1QAPSUAH3VX9DFUWBXLENVM
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	16h25m34s.322
RA (top/left)	16h26m55s.350
RA (top/right)	16h27m11s.240
RA (bottom/right)	16h24m14s.170
RA (bottom/left)	16h23m57s.150

Dec (center)	-23°26′54″.67
Dec (top/left)	-23°56′05″.97
Dec (top/right)	-23°00′26″.43
Dec (bottom/right)	-22°57′40″.97
Dec (bottom/left)	-23°53′17″.86

Image Index:

Contribution Index (beta):

RHO OPHIUCHI NEBULA - IC 4604

RHO OPHIUCHI NEBULA - IC 4604

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Image Index:

Contribution Index (beta):

RHO OPHIUCHI NEBULA - IC 4604

RHO OPHIUCHI NEBULA - IC 4604

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