NGC 3521 (Jim Fordice)

Celestial hemisphere: Southern · Constellation: Leo (Leo) · Contains: NGC 3521 · PGC 1149859 · PGC 1151710 · PGC 1157159 · PGC 135771 · PGC 135772 · PGC 33536

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NGC 3521

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NGC 3521

NGC 3521 (PGC 33550) is a flocculent intermediate spiral galaxy in Leo. Its morphological classification is SAB(rs)bc which means that it is a spiral galaxy with a trace bar structure (SAB), a weak inner ring (rs), and a moderate to loosely wound arm structure (bc).

I obtained the calibrated lights frames used to create the final image from Telescope Live. The frames were imaged by the CHI-1-CMOS Telescope at the El Sauce Observatory in Chile.

I observed this galaxy on 24 February 2017 at the General Nathan Twining Observatory (GNTO) in New Mexico using a 12” Skywatcher Dobsonian. I used a 10mm Delos eyepiece (149.4 magnification). My observation was: “Large and bright with a bright core this galaxy was easily spotted. It is an oval oriented north-south.”

Visual magnitude: +9.00
Apparent size: 8.3 x 4.5 arcmin
Distance: 40 Mly
Diameter: 87.8 kly

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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	9260500
PixInsight job	U7O5XXBOQV7ODX2W7DIF25PV9I3MX4KO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h05m48s.512
RA (top/left)	11h06m22s.353
RA (top/right)	11h06m15s.975
RA (bottom/right)	11h05m14s.628
RA (bottom/left)	11h05m21s.550

Dec (center)	-00°02′10″.53
Dec (top/left)	-00°11′47″.96
Dec (top/right)	+00°08′38″.47
Dec (bottom/right)	+00°07′26″.87
Dec (bottom/left)	-00°12′59″.43

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NGC 3521

NGC 3521

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NGC 3521

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