Diamond Ring Nebula (ABELL 33 / PK238+34.1) (DoubleStarPhotography)

Celestial hemisphere: Southern · Constellation: Hydra (Hya) · Contains: HD83352 · HD83471 · HD83535 · HD83569 · PGC 1075688 · PGC 1076027 · PGC 1077000 · PGC 1077828 · PGC 1081918 · PGC 1085508 · PGC 1087949 · PGC 1088161 · PGC 1088646 · PK238+34.1

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Diamond Ring Nebula (ABELL 33 / PK238+34.1)

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Diamond Ring Nebula (ABELL 33 / PK238+34.1)

Abell 33 (aka A33 or PK238+34.1) is a planetary nebula in the constellation Hydra.

The star HD 83535 just happens to coincidentally (from our vantage point) be aligned with the nebula's rim, giving the appaerance of a "Diamond ring". The fact that the nebula has a somewhat spherical form is mainly due to the absence of spin of the central star. The central star is a double star, (Not resolved to full separation in this image), and as of 2014, it was unknown as to whether they formed a physical pair or a chance alignment.

The nebula's faint magnitude (+12.9) makes this a somewhat challenging target but well worth the effort!

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	9755586
PixInsight job	AL5IW2BVDQELCSIW4IFGW2PF2X4LCDCK
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	09h39m04s.200
RA (top/left)	09h37m45s.637
RA (top/right)	09h37m43s.723
RA (bottom/right)	09h40m22s.763
RA (bottom/left)	09h40m24s.765

Dec (center)	-02°50′11″.84
Dec (top/left)	-03°10′17″.60
Dec (top/right)	-02°30′34″.15
Dec (bottom/right)	-02°30′05″.36
Dec (bottom/left)	-03°09′48″.76

Image Index:

Contribution Index (beta):

Diamond Ring Nebula (ABELL 33 / PK238+34.1)

Diamond Ring Nebula (ABELL 33 / PK238+34.1)

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Image Index:

Contribution Index (beta):

Diamond Ring Nebula (ABELL 33 / PK238+34.1)

Diamond Ring Nebula (ABELL 33 / PK238+34.1)

Equipment

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Description

Comments

Sky plot

Histogram

In these public groups

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