IsWe2 (Ishida-Weinberger 2) (James E.)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: HD211746 · PK107+07.1

Powered byPixInsight

IsWe2 (Ishida-Weinberger 2)

Powered byPixInsight

IsWe2 (Ishida-Weinberger 2)

Ishida Weinberger 2 (IW2 or IsWe2) is a large, ancient planetary nebula in Cepheus and is about 850 light years distant (K. Ishida and R. Weinberger, “Two senile nearby planetary nebula and the local PN population,” Astronomy and Astrophysics, 178, 227-236, 1987). It appears to be slightly elongated in the NW-SE direction encompassing about 18.5’. From the expansion velocities of Ha and NII, IW 2 is estimated to have a kinematic age of about 40000 years. It is quite faint but emits both Ha and NII [but no detectable OIII with our equipment]. The effective temperature of its white dwarf star is 100,000 K. It is one of the larger PN known being nearly 4 light years in extent. The filamentary structures are likely shock fronts due to the nebula interacting with the interstellar medium. The central star, situated near the “S” shaped filament, is clearly displaced from the geometrical center of the nebula, (K. M. Xilouris et al., “The shaping of aging planetary nebulae,” Astronomy and Astrophysics, 310, 603-612, 1996). [ref: Astrodon Imaging, IW2, 2011]

This PN is basically an Ha-only target (and NII according to professional sources) with no OIII data present. Drawing out the faint structure of this planetary nebula also revealed an abundance of superimposed Ha which made this target essentially blend in with background.

Imaged over several nights: Sept 14-18, and 24, 2020.

N.I.N.A. Users
Narrowband imaging
The refractors!
ZWO ASI2600MM Pro
NOVAC
"Simply Stellarvue"

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	6500966
PixInsight job	INMLTB2IG0AKSFE27X219W4RB11J0GV2
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h12m59s.99
RA (top/left)	22h17m25s.94
RA (top/right)	22h17m58s.17
RA (bottom/right)	22h08m17s.74
RA (bottom/left)	22h08m17s.94

Dec (center)	+65°53′26″.1
Dec (top/left)	+65°08′27″.6
Dec (top/right)	+66°36′48″.7
Dec (bottom/right)	+66°37′57″.5
Dec (bottom/left)	+65°09′30″.3

Image Index:

Contribution Index (beta):

IsWe2 (Ishida-Weinberger 2)

IsWe2 (Ishida-Weinberger 2)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

IsWe2 (Ishida-Weinberger 2)

IsWe2 (Ishida-Weinberger 2)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information