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IC417 & NGC1931 - The Spider and the Fly

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#1 Yoddha

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Posted 21 March 2019 - 04:09 AM

 get.jpg?insecure

 

Total: 5h, WO 80FD @ f/5.9, QHY22, Astrodon HII 3nm, APT, PHD2, PI, PS

 

The Spider and the Fly "pair" are visually close neighbors of the famous Auriga nebulae "Faming Star" (IC405) and "Tadpoles" (IC410). The smaller object in the upper part of the frame is NGC 1913 (Sh2-237) called the Fly. It is considered as smaller version of the Orion nebula – contains a young cluster, it’s Trapezium, has an emission and reflection parts. The brighter object is IC417 (Sh2-234) which should be the spider who waits for prey, laying in the faint web (personally I see more obvious figure in the lower left angle). IC417 also hosts a young cluster (Stock 8) and the two small clouds above the brightest star hide stellar nurseries. The emission part dominates the region, however with the appropriate imaging time is possible show also the reflections from the hot and massive blue stars. A near infra-red study with Spitzer Telescope shows that the bright wave from the Spider towards the Fly hides packs of young stars that maybe form that interesting shape from the clouds located between them and us.

 

The distances to the objects in the region show curious facts. The two nebulae are ~500 ly away from each other. Respectively ~7 500 and ~7 000 ly from Earth for IC417 and NGC1931. It looks that there is no direct connection in this “pair” as well as with the neighbors - IC405 ~1 500 ly, IC410 ~12 000 ly away from Earth. The whole complex looks very close just visually, but is spread out on more than 10 000 ly in the Orion-Cygnus arm of Milky Way.

 

Definitely both the Spider and the Fly are interesting objects alone and in pair, so most likely next winter will get back to them for more data.


  • starbob1, psandelle, mikewayne3 and 11 others like this

#2 44maurer

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Posted 21 March 2019 - 12:40 PM

Nice job.

#3 Yoddha

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Posted 21 March 2019 - 12:51 PM

Thank you Brian! :)



#4 APshooter

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Posted 21 March 2019 - 05:01 PM

Really smooth, I like the monochrome look.



#5 Yoddha

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Posted 22 March 2019 - 03:32 AM

Many thanks APshooger! 



#6 elmiko

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Posted 22 March 2019 - 08:18 AM

Great details! That's a cool image.

Mike



#7 Poochpa

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Posted 22 March 2019 - 11:17 AM

Excellent image, Ivo!

Mike



#8 Yoddha

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Posted 22 March 2019 - 11:38 AM

Great details! That's a cool image.

Mike

Thank you Mike! :)



#9 Yoddha

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Posted 22 March 2019 - 11:39 AM

Excellent image, Ivo!

Mike

 

Many thanks Mike! :)



#10 AhBok

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Posted 22 March 2019 - 04:32 PM

Ivo,

Most of the spider images I see, look more like snails! I can easily imagine a fly caught in a spider’s web when looking at the excellent detail in this image!

#11 Yoddha

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Posted 23 March 2019 - 06:00 AM

Many thanks Randy! :)




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