Sh2 181 (Jerry Yesavage)

Sh2 181

An upgrade of the prior image from the collection:

Sh2 181 Another Faint Sharpless2 Object

From GalaxyMap:

Radio observations and modelling suggest that Sh 2-181 is an HII region ionised by a B0 to B0.5 class star. A 1978 paper identifies the ionising star as the B1 V class LS I +64 47. The nebula is connected to the Cas OB7 association in the Perseus arm.

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

There are 313 Sh2 objects and I have imaged all one way or another.

The first one was taken on December 23, 2013 and the series completed October 17, 2019.

Some of the challenges with this series are FOV size and low declination:

FOV: 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.

DEC: 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.

EQUIPMENT: 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...

Narrowband imaging
Sharpless2 Objects
Cloudy Nights

Sharpless2 Objects

	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
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Star trails
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	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

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Status	Advanced success
Started	...
Astrometry.net job	5217662
PixInsight job	5VZG3KX5SJT5C62RLMHUFJ45FDS8G0YY
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h49m20s.294
RA (top/left)	00h39m18s.487
RA (top/right)	00h59m26s.139
RA (bottom/right)	00h59m55s.260
RA (bottom/left)	00h38m41s.178

Dec (center)	+65°12′34″.48
Dec (top/left)	+64°27′33″.18
Dec (top/right)	+64°28′05″.99
Dec (bottom/right)	+65°54′41″.99
Dec (bottom/left)	+65°54′10″.67

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Sh2 181

Sh2 181

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Sh2 181

Sh2 181

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