APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

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APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by APOD Robot » Sat Jun 22, 2024 4:05 am

Image Lynds Dark Nebula 1251

Explanation: Stars are forming in Lynds Dark Nebula (LDN) 1251. About 1,000 light-years away and drifting above the plane of our Milky Way galaxy, LDN 1251 is also less appetizingly known as "The Rotten Fish Nebula." The dusty molecular cloud is part of a complex of dark nebulae mapped toward the Cepheus flare region. Across the spectrum, astronomical explorations of the obscuring interstellar clouds reveal energetic shocks and outflows associated with newborn stars, including the telltale reddish glow from scattered Herbig-Haro objects hiding in the image. Distant background galaxies also lurk in the scene, almost buried behind the dusty expanse. This alluring view spans over four full moons on the sky, or 35 light-years at the estimated distance of LDN 1251.

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Ann
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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by Ann » Sat Jun 22, 2024 7:58 am

Well, dark nebulas are not my forte and not my interest, but... let's have some fun, shall we?

I see a a very tall cosmic mermaid-alien with bad hair, a misshapen hand and a fishtail in this dark nebula. What do you see?

APOD 22 June 2024 annotated 1.png
Lynds Dark Nebula 1251 with mermaid-alien.
Image Credit & Copyright: Long Xin

If we want to be more serious, we can try to identify objects seen in the same direction as the nebula. Here I have identified one star, two background galaxies and one possible region of star formation:

APOD 22 June 2024 annotated 2.png
HD 214710 is a red giant star, and UGC 12160 and LEDA 166755
are galaxies. That little orange thingy could be star formation.


Oh, and LDN 1251 is located in Cepheus, between Errai and Alfirk. (And no, Errai isn't spelt with tree r's. That part of the annotation is not mine.)

Constellation Cepheus with LDN 1251 Naoyuki Kurita.png
Constellation Cepheus. Credit: Naoyuki Kurita

Ann
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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by AVAO » Sat Jun 22, 2024 10:15 am

Ann wrote: Sat Jun 22, 2024 7:58 am Well, dark nebulas are not my forte and not my interest, but... let's have some fun, shall we?

I see a a very tall cosmic mermaid-alien with bad hair, a misshapen hand and a fishtail in this dark nebula. What do you see?

APOD 22 June 2024 annotated 1.png
Lynds Dark Nebula 1251 with mermaid-alien.
Image Credit & Copyright: Long Xin

If we want to be more serious, we can try to identify objects seen in the same direction as the nebula. Here I have identified one star, two background galaxies and one possible region of star formation:

APOD 22 June 2024 annotated 2.png
HD 214710 is a red giant star, and UGC 12160 and LEDA 166755
are galaxies. That little orange thingy could be star formation.
Oh, and LDN 1251 is located in Cepheus, between Errai and Alfirk. (And no, Errai isn't spelt with tree r's. That part of the annotation is not mine.)

Constellation Cepheus with LDN 1251 Naoyuki Kurita.png
Constellation Cepheus. Credit: Naoyuki Kurita

Ann

Everything is a question of wavelength. I like your reading cosmic mermaid and her three playing galaxy children in the background. She is a beauty ;-)

Click to view full size image 1 or image 2
https://live.staticflickr.com/65535/538 ... e897_o.jpg HERSCHEL (IR) jac berne (flickr)

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Ann
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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by Ann » Sat Jun 22, 2024 11:03 am

AVAO wrote: Sat Jun 22, 2024 10:15 am
Ann wrote: Sat Jun 22, 2024 7:58 am Well, dark nebulas are not my forte and not my interest, but... let's have some fun, shall we?

I see a a very tall cosmic mermaid-alien with bad hair, a misshapen hand and a fishtail in this dark nebula. What do you see?

APOD 22 June 2024 annotated 1.png
Lynds Dark Nebula 1251 with mermaid-alien.
Image Credit & Copyright: Long Xin

If we want to be more serious, we can try to identify objects seen in the same direction as the nebula. Here I have identified one star, two background galaxies and one possible region of star formation:

APOD 22 June 2024 annotated 2.png
HD 214710 is a red giant star, and UGC 12160 and LEDA 166755
are galaxies. That little orange thingy could be star formation.
Oh, and LDN 1251 is located in Cepheus, between Errai and Alfirk. (And no, Errai isn't spelt with tree r's. That part of the annotation is not mine.)

Constellation Cepheus with LDN 1251 Naoyuki Kurita.png
Constellation Cepheus. Credit: Naoyuki Kurita

Ann

Everything is a question of wavelength. I like your reading cosmic mermaid and her three playing galaxy children in the background. She is a beauty ;-)

Click to view full size image 1 or image 2
https://live.staticflickr.com/65535/538 ... e897_o.jpg HERSCHEL (IR) jac berne (flickr)
Thanks, Jac, I'm really flattered that you would use my annotated mermaid to show the locations of star formation in LDN 1251! :D

(And of course the mermaid is reading something! I didn't even see it.)

Ann
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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by Christian G. » Sat Jun 22, 2024 12:08 pm

APOD Robot wrote: Sat Jun 22, 2024 4:05 am telltale reddish glow from scattered Herbig-Haro objects hiding in the image.
Telltale yet hidden seems contradictory! Where in the image do we see signs of HH objects?

jelh

Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by jelh » Sat Jun 22, 2024 12:18 pm

I also wondered about the HH objects. I could not spot any.

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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by Ann » Sat Jun 22, 2024 1:53 pm

Christian G. wrote: Sat Jun 22, 2024 12:08 pm
APOD Robot wrote: Sat Jun 22, 2024 4:05 am telltale reddish glow from scattered Herbig-Haro objects hiding in the image.
Telltale yet hidden seems contradictory! Where in the image do we see signs of HH objects?

Maybe these:

APOD 22 June 2024 annotated 3.png

Ann
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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by Chris Peterson » Sat Jun 22, 2024 2:17 pm

APOD Robot wrote: Sat Jun 22, 2024 4:05 am Image Lynds Dark Nebula 1251

Explanation: Stars are forming in Lynds Dark Nebula (LDN) 1251. About 1,000 light-years away and drifting above the plane of our Milky Way galaxy, LDN 1251 is also less appetizingly known as "The Rotten Fish Nebula." The dusty molecular cloud is part of a complex of dark nebulae mapped toward the Cepheus flare region. Across the spectrum, astronomical explorations of the obscuring interstellar clouds reveal energetic shocks and outflows associated with newborn stars, including the telltale reddish glow from scattered Herbig-Haro objects hiding in the image. Distant background galaxies also lurk in the scene, almost buried behind the dusty expanse. This alluring view spans over four full moons on the sky, or 35 light-years at the estimated distance of LDN 1251.

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Re: APOD: Lynds Dark Nebula 1251 (2024 Jun 22)

Post by Christian G. » Sat Jun 22, 2024 5:56 pm

Ann wrote: Sat Jun 22, 2024 1:53 pm
Christian G. wrote: Sat Jun 22, 2024 12:08 pm
APOD Robot wrote: Sat Jun 22, 2024 4:05 am telltale reddish glow from scattered Herbig-Haro objects hiding in the image.
Telltale yet hidden seems contradictory! Where in the image do we see signs of HH objects?

Maybe these:


APOD 22 June 2024 annotated 3.png


Ann
Thanks!