NGC 253 (Frank Colosimo)

Celestial hemisphere: Southern · Constellation: Sculptor (Scl) · Contains: IC 1576 · IC 1578 · NGC 253 · Sculptor galaxy

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NGC 253

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NGC 253

NGC 253 in Sculptor is large galaxy visible deep in the Southern skies at a DEC of -25:17 degrees. It has a visual magnitude of 7.1 and an apparent size of 25 x 7 arc minutes. It is estimated to be 10 million light years away, about the same as NGC 891.

It was discovered by Caroline Herschel on September 23, 1793, and is one of her major discoveries. It is the brightest member of the Sculptor group of galaxies, one of the nearest groups to our Local Group. It is sometimes called the Silver Coin Galaxy, or simply the Sculptor Galaxy. From my latitude of around 40N, it never gets high enough to image well, but I can't resist taking a stab at it.

Imaging data:

Date: Sep 2-3 2008, additional data from Nov 2018

Location: New Ringgold PA

Optics: Televue NP101 at f/5.4

Mount: Paramount ME

Camera: SBIG ST-8XME / CFW-8

Guiding: Integral self guiding

Exposure: Luminance: 90 minutes unbinned, RGB: 36 min ea binned 2x2.

Subexposures were 3 min for a total of 3 hours 18 minutes

Processing: Image acquisition using CCD Autopilot. Initial processing was done using Maxim DL with subsequent processing with Photoshop.

Northeast Imagers
Cloudy Nights

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	2386876
PixInsight job	PHL7TSH4AMM6ZUVIE3PLRIPJV2URBDFJ
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h47m23s.48
RA (top/left)	00h44m59s.24
RA (top/right)	00h51m08s.15
RA (bottom/right)	00h49m46s.15
RA (bottom/left)	00h43m39s.76

Dec (center)	-25°18′30″.8
Dec (top/left)	-25°59′53″.4
Dec (top/right)	-25°32′20″.3
Dec (bottom/right)	-24°36′59″.1
Dec (bottom/left)	-25°04′21″.1

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NGC 253

NGC 253

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Image Index:

Contribution Index (beta):

NGC 253

NGC 253

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Description

Comments

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In these public groups

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