NGC1359 Magellanic Spiral rarely imaged (Freestar8n)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: NGC 1359

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NGC1359 Magellanic Spiral rarely imaged

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NGC1359 Magellanic Spiral rarely imaged

This is a very interesting and rarely imaged Magellanic spiral galaxy, NGC1359, in Eridanus. Imaged with EdgeHD11 at f/7 with ASI1600MMPro, native 0.4" per pixel and resized to 0.8". Imaged with i' r' g' Sloan filters and guided with MetaGuide and OAG.

This is from fairly bright suburban skies in Melbourne, Australia - with SQM value of about 18.6 mag/arc-sec^2. Images captured automatically over two nights, with autofocus every 40 minutes based on multi-star parabolic fit - and stepper motor on the primary focusing knob.

The colors were calibrated using 46 foreground APASS stars with Sloan magnitudes. Then gradient removal and levels stretch in Photoshop - and 50% reduction in image size as final step. No other manipulation of the image was performed, and no alteration of the calibrated colors. The deep red of some of the stars is due to their cool temperatures and the extended IR sensitivity of the i' Sloan filter. 20x5m exposures in each of the i', r', g' filters - mapped to R, G, B.

Note the interesting similarity of NGC1359 with our large Magellanic cloud. Also note the star formation indicated by the blue color of new stars - in contrast with the older, more distant galaxy. I thought this was simply an irregular galaxy, but apparently it is classified as Magellanic.

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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
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	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
Traveller
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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	Advanced success
Started	...
Astrometry.net job	3161555
PixInsight job	CUZS8C6WD67MSUKAARKFNAJMI8PKTGHE
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h33m56s.616
RA (top/left)	03h34m10s.241
RA (top/right)	03h34m38s.700
RA (bottom/right)	03h33m43s.480
RA (bottom/left)	03h33m14s.405

Dec (center)	-19°29′16″.89
Dec (top/left)	-19°40′17″.50
Dec (top/right)	-19°23′31″.79
Dec (bottom/right)	-19°18′16″.32
Dec (bottom/left)	-19°35′01″.27

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NGC1359 Magellanic Spiral rarely imaged

NGC1359 Magellanic Spiral rarely imaged

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Image Index:

Contribution Index (beta):

NGC1359 Magellanic Spiral rarely imaged

NGC1359 Magellanic Spiral rarely imaged

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