Sh2-188 (Shrimp Nebula, Dolphin Nebula) - Images https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/ vtastro.org Discussion Board en-US Thu, 12 Mar 2026 01:47:16 +0000 wpForo 60 RE: Sh2-188 (Shrimp Nebula, Dolphin Nebula) https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/#post-1065 Tue, 29 Oct 2024 16:29:05 +0000 @terri Thanks, Terri!  Stellarium has its size as 10'x3', so not very large.  I was going to use the HD8 at native fL (2032mm), but the f/10 always dissuades me a bit.  

Sorry about the IT problems!  Always something going on with computers/software/websites, right?  Ugh.

Greg

]]> Images Greg Erianne https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/#post-1065 RE: Sh2-188 (Shrimp Nebula, Dolphin Nebula) https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/#post-1063 Tue, 29 Oct 2024 16:18:09 +0000 Greg, nice image of a not often imaged target.  Not sure this is on my headlights.    I'll have to get a peek at how big it is but based on what you used to image, it must be on the smaller size.    And yes, I'm no longer getting alerts to my subscription.   I have no idea what's going on.    We're having all kinds of IT issues.

 

Terri

]]> Images Terri Zittritsch https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/#post-1063 Sh2-188 (Shrimp Nebula, Dolphin Nebula) https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/#post-1059 Sat, 26 Oct 2024 04:38:13 +0000 Sh2-188 is an interesting planetary nebula located about 700-850 light years (ly) away from Earth in the constellation Cassiopeia.   Unlike many other planetary nebulae that are more symmetrically shaped, the Shrimp Nebula has a predominant crescent shape sculpted over its long expansion by the incredibly fast movement through the interstellar medium (ISM), with which it interacts. Located near the center of Sh2-188 is the central star moving rapidly through the ISM (toward the lower left in this image) and causing the nebula’s bow shape.

Although the brightest part of the arc in Sh2-188 is crescent-shaped, a fainter gas cloud can be seen in this image opposite the main arc, actually forming a closed ring.

Capture Dates: 10/21, 10/22, and 10/24/24

Equipment

EdgeHD 800 with 0.7x focal reducer @ 1422mm fL
Guidescope/Cam: Celestron OAG and ASI174mm mini
ASIAir Plus, ASI2600MM, ZWO AM5 mount, ZWO 7-position filter wheel

Filters: 

Antlia 3nm Narrowband H-alpha 2": 73×300″ (6:05)
Antlia 3nm Narrowband Oxygen III 2": 91×300″ (7:35)
Antlia 3nm Narrowband Sulfur II 2": 84×300″ (7:00)
Antlia Pro-V RGB Filters: 30x60” (0:30)

Total Integration Time: 21:10

Processed with PixInsight and Adobe Photoshop.

]]> Images Greg Erianne https://vtastro.org/community/images/sh2-188-shrimp-nebula-dolphin-nebula/#post-1059