IC1805 and Mel 15 - Images https://vtastro.org/community/images/ic1805-and-mel-15/ vtastro.org Discussion Board en-US Sun, 05 Apr 2026 01:48:31 +0000 wpForo 60 RE: IC1805 and Mel 15 https://vtastro.org/community/images/ic1805-and-mel-15/#post-1029 Sun, 08 Sep 2024 14:03:08 +0000 Beautiful image with lots of details in those knots and wisps of nebulosity!  Love it!

 

Terri

]]> Images Terri Zittritsch https://vtastro.org/community/images/ic1805-and-mel-15/#post-1029 IC1805 and Mel 15 https://vtastro.org/community/images/ic1805-and-mel-15/#post-1023 Sun, 01 Sep 2024 10:02:38 +0000 The intriguingly complex and twisting area of nebulosity shown at the center of this image lies within the “heart” of the Heart Nebula (IC 1805, Sh2-190) in the constellation Cassiopeia and about 7,500 light-years (ly) away from Earth.

This bright area of interstellar gas knots is mainly composed of hydrogen and sulfur gas sculpted by the stellar winds from a small open cluster of about 60 visually discernible stars of widely differing sizes called Melotte 15 (also Collinder 26).  In this image, the stars of Mel 15 populate the area above the main pillar of gas and contain a notable 7.8-magnitude binary star system, HD15558, visible in this image at the upper right of the central nebulosity.   

On the left (top and bottom) and far right (top) of the image are “bright-rimmed clouds” (BRC) that form the edges of IC1805’s interior and give the Heart Nebula its characteristic appearance in wider-field images.

Capture Dates: 8/26, 8/29 (AM), 8/29 (PM)

Equipment

Stellarvue SVX90T Apochromatic Refractor @native 540mm fL
Guidescope/Cam: SV106 with ASI120mm mini
ASIAir Plus, ASI585MC, ZWO AM5 mount, ZWO 5-position filter wheel

Filters

Antlia Dual Narrowband 5nm Ha/OIII: 115x300s
Antlia Dual Narrowband 5nm SII/Hb: 70x300s
ZWO UV/IR cut Luminance filter (for RGB stars) 20x60s

Total integration time: 15:45

Processed with PixInsight and Adobe Photoshop.

]]> Images Greg Erianne https://vtastro.org/community/images/ic1805-and-mel-15/#post-1023