Sh2-268


Gregg Ruppel
 

Hi all:

Sh2-268 is a large, but extremely faint emission nebula in Orion. The emission is so faint it was barely visible on 15 minute exposures through an Ha filter.

http://www.greggsastronomy.com/IMAGES/sh2-268-HaLRGB.jpg

There are 2 other Sharpless objects in the field: Sh2-269 is the bright knot of nebulosity in the upper left quadrant.  Sh2-270 is the tiny bright dot of nebulosity near the bottom of main nebula (not sure how it deserved its own designation).  Also in the field are two markely different open clusters: NGC 2194 is the dense cluster in the lower left quadrant, pretending to be a globular. NGC 2169 is the loose collection of bright blue stars in the upper right quadrant.

HaLRGB, 29.5 hours total exposure, including 12 hours of Ha, from Dark Sky New Mexico

Merry Christmas, and Best Wishes for the New Year!

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site
http://www.greggsastronomy.com/


Brian Ottum
 

Gregg,
Very nice. Is there a "ranked" list of Sharpless objects to separate the great/good/marginal?
Brian

-----Original Message-----
From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Gregg Ruppel
Sent: Wednesday, December 23, 2020 7:59 PM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Sh2-268

Hi all:

Sh2-268 is a large, but extremely faint emission nebula in Orion. The emission is so faint it was barely visible on 15 minute exposures through an Ha filter.

http://www.greggsastronomy.com/IMAGES/sh2-268-HaLRGB.jpg

There are 2 other Sharpless objects in the field: Sh2-269 is the bright knot of nebulosity in the upper left quadrant. Sh2-270 is the tiny bright dot of nebulosity near the bottom of main nebula (not sure how it deserved its own designation). Also in the field are two markely different open clusters: NGC 2194 is the dense cluster in the lower left quadrant, pretending to be a globular. NGC 2169 is the loose collection of bright blue stars in the upper right quadrant.

HaLRGB, 29.5 hours total exposure, including 12 hours of Ha, from Dark Sky New Mexico

Merry Christmas, and Best Wishes for the New Year!

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/


Gregg Ruppel
 

Brian 
I usually refer to Dean Salman’s excellent web site http://sharplesscatalog.com/ to pick targets.  If his picture takes more than about 8 hours I assume that it is pretty faint.

Gregg

Visit my astronomy & astrophotography site
www.greggsastronomy.com

On Dec 24, 2020, at 7:41 AM, Brian Ottum <ottum@...> wrote:

Gregg,
Very nice.  Is there a "ranked" list of Sharpless objects to separate the great/good/marginal?
Brian

-----Original Message-----
From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Gregg Ruppel
Sent: Wednesday, December 23, 2020 7:59 PM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Sh2-268

Hi all:

Sh2-268 is a large, but extremely faint emission nebula in Orion. The emission is so faint it was barely visible on 15 minute exposures through an Ha filter.

http://www.greggsastronomy.com/IMAGES/sh2-268-HaLRGB.jpg

There are 2 other Sharpless objects in the field: Sh2-269 is the bright knot of nebulosity in the upper left quadrant.  Sh2-270 is the tiny bright dot of nebulosity near the bottom of main nebula (not sure how it deserved its own designation).  Also in the field are two markely different open clusters: NGC 2194 is the dense cluster in the lower left quadrant, pretending to be a globular. NGC 2169 is the loose collection of bright blue stars in the upper right quadrant.

HaLRGB, 29.5 hours total exposure, including 12 hours of Ha, from Dark Sky New Mexico

Merry Christmas, and Best Wishes for the New Year!

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/












Dan Crowson
 

Brian,

Gregg's suggestion of Deal Salman's site is really good. I would also mention that he pulls out (dare I say processes out) a lot of nebulosity...

Dean's site also lists different designations or you can go to the galaxy map web site (example - http://galaxymap.org/cat/view/sharpless/2) and it will show them. If there's an LBN, you can look at that list. There are two fields about how colorful and how bright. Lower numbers are brighter. If it lists higher, especially on the brightness (1-6, 6 being very dim), you get a clue as to what is not worth spending time on.

I have the LBN list in a spreadsheet if you want it.

Dan
----
Dan Crowson dcrowson@crowson.com
Dardenne Prairie MO http://www.crowson.com

-----Original Message-----
From: DarkSkyNewMexico@groups.io [mailto:DarkSkyNewMexico@groups.io] On Behalf Of Brian Ottum
Sent: Thursday, December 24, 2020 8:41 AM
To: DarkSkyNewMexico@groups.io
Subject: Re: [DarkSkyNewMexico] Sh2-268

Gregg,
Very nice. Is there a "ranked" list of Sharpless objects to separate the great/good/marginal?
Brian

-----Original Message-----
From: DarkSkyNewMexico@groups.io <DarkSkyNewMexico@groups.io> On Behalf Of Gregg Ruppel
Sent: Wednesday, December 23, 2020 7:59 PM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Sh2-268

Hi all:

Sh2-268 is a large, but extremely faint emission nebula in Orion. The emission is so faint it was barely visible on 15 minute exposures through an Ha filter.

http://www.greggsastronomy.com/IMAGES/sh2-268-HaLRGB.jpg

There are 2 other Sharpless objects in the field: Sh2-269 is the bright knot of nebulosity in the upper left quadrant. Sh2-270 is the tiny bright dot of nebulosity near the bottom of main nebula (not sure how it deserved its own designation). Also in the field are two markely different open clusters: NGC 2194 is the dense cluster in the lower left quadrant, pretending to be a globular. NGC 2169 is the loose collection of bright blue stars in the upper right quadrant.

HaLRGB, 29.5 hours total exposure, including 12 hours of Ha, from Dark Sky New Mexico

Merry Christmas, and Best Wishes for the New Year!

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/


Bernard Miller
 

Gregg,

What a great image. A nebula, a globular and maybe even an open cluster. A lot going on. Thanks for sharing.

Bernard

-----Original Message-----
From: DarkSkyNewMexico@groups.io On Behalf Of Gregg Ruppel
Sent: Wednesday, December 23, 2020 5:59 PM
To: undisclosed-recipients:
Subject: [DarkSkyNewMexico] Sh2-268

Hi all:

Sh2-268 is a large, but extremely faint emission nebula in Orion. The emission is so faint it was barely visible on 15 minute exposures through an Ha filter.

http://www.greggsastronomy.com/IMAGES/sh2-268-HaLRGB.jpg

There are 2 other Sharpless objects in the field: Sh2-269 is the bright knot of nebulosity in the upper left quadrant. Sh2-270 is the tiny bright dot of nebulosity near the bottom of main nebula (not sure how it deserved its own designation). Also in the field are two markely different open clusters: NGC 2194 is the dense cluster in the lower left quadrant, pretending to be a globular. NGC 2169 is the loose collection of bright blue stars in the upper right quadrant.

HaLRGB, 29.5 hours total exposure, including 12 hours of Ha, from Dark Sky New Mexico

Merry Christmas, and Best Wishes for the New Year!

--
Clear skies,

Gregg
Visit my astronomy & astrophotography site http://www.greggsastronomy.com/







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