Sh2 303 (Jerry Yesavage)

Sh2 303

Two to go in the series.

From GalaxyMap:

According to a 1982 study, this nebula is ionised by the Wolf-Rayet star WR 6 (EZ CMa) along with Sh 2-304 and Sh 2-308. However, a look at this region in hydrogen-alpha suggests that Sh 2-303 is the brightest part of a ring that appears to surround several B class giants, including LS 92 (B2/3 III) and HD 51200 (B2 III/IV). So it seems as though WR 6 may not be the only ionising star for this nebula.

Avedisova includes Sh 2-303 = Bran 3 in the star formation region SFR 233.40-9.42 along with the smaller nebula Bran 1.

GENERAL NOTE ON SHARPLESS2 OBJECTS>>>>>>>>>>>>>

There are 313 Sh2 objects. As of the date of this image I had imaged 311 (99%).

Here is the scorecard:

There are 11 too diffuse/large to image well with my set up (Sh2 111, 117, 122, 131, 132, 145, 178, 218, 230, 268 and 310). I have imaged the first 6 of these mostly in the Nikon Wide angle shot referenced below and 178 and 230 as part of other images. I will do the rest at least once as they come into view this year. I missed 304 and 310 last year running out of time. So there are these 2 more to do here.

There are 5 that are never above 14 DEG (Sh2 2-6) but as of 7/12/21 I can get these now with pier upgrades and the images are completed as best as I can.

The 2 remaining all are in Expert Scheduler waiting for them to pass by. They are all higher elevations.

The first one was taken on December 23, 2013.

Many were taken with my old Tak 180 ED, which had a wide field of view, but was replaced with my Stellarvue 130, which is more narrow field. I have also taken two very wide field HA images with my Nikon D800 and a 50mm lens. I transitioned from my CCD SBIG 8300M to a CMOS ZWO ASI6200M Pro in September 2021.

This is my collection:

Sharpless2

Wide-Angle Hydrogen Alpha Nikon Image Sh2 79-171

Please note there is also a Sharpless2 Group with now more than 1500 examples.

Sharpless2 Group

Other useful links include:

Gary Imm's Collection

GalaxyMap's Collection

The Sharpless Catalog

The MDW H-alpha Sky Survey

Reiner Vogel's detailed observing catalog

Hope you enjoy these obscure but interesting objects...

Sharpless2 Objects
Cloudy Nights

Sharpless2 Objects

	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

	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

	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

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	5091949
PixInsight job	T07ACGGX160ETVKTE8ZJLBDVLBN9PK1F
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	06h54m00s.570
RA (top/left)	06h58m43s.883
RA (top/right)	06h49m16s.648
RA (bottom/right)	06h49m15s.173
RA (bottom/left)	06h58m47s.259

Dec (center)	-22°23′46″.55
Dec (top/left)	-21°40′02″.47
Dec (top/right)	-21°40′16″.80
Dec (bottom/right)	-23°06′56″.71
Dec (bottom/left)	-23°06′41″.32

Image Index:

Contribution Index (beta):

Sh2 303

Sh2 303

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Sh2 303

Sh2 303

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

In these collections

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