Nature The Melotte 15 Complex in Hydrogen-Alpha Light

The Melotte 15 Complex in Hydrogen-Alpha Light · 12:35 AM

Melotte 15 is a cluster of young stars in the mid of the cloud complex IC1805 - the Heart Nebula - in the constellation Cassiopeia.

This is a so called narrowband image. Galactic cloud complexes that contain hydrogen-alpha gas send out light of a deep red wavelength when they receive strong radiation of nearby stars. The narrowband filter only lets through this wavelength and closes out all other colors and so also the light pollution.

The image was made from 56 images of 600s exposure @ ISO 800 with 12 nm Hydrogen-Alpha narrowband filter. The data were shot through a 130/910mm refractor with a stock Pentax K3ii.

Processing in Astro Pixel Processor and Photoshop CC2018

GeoJerry · 10-05-2018, 09:25 PM

This one is also cool but I wish I could view these side by side on a large monitor so that I could see how your two posts compare.

**Pete_XL** · 10-06-2018, 12:15 AM

Originally posted by GeoJerry

This one is also cool but I wish I could view these side by side on a large monitor so that I could see how your two posts compare.

In this case they only differ in color because I took the black&white hydrogen alpha data for 100% of the luminance information. So it delivers all of the details and contrast. The color shot was taken only for the color values and distribution.

**Ash** · 10-02-2019, 06:28 AM

Originally posted by Pete_XL

Melotte 15 is a cluster of young stars in the mid of the cloud complex IC1805 - the Heart Nebula - in the constellation Cassiopeia.

This is a so called narrowband image. Galactic cloud complexes that contain hydrogen-alpha gas send out light of a deep red wavelength when they receive strong radiation of nearby stars. The narrowband filter only lets through this wavelength and closes out all other colors and so also the light pollution.

The image was made from 56 images of 600s exposure @ ISO 800 with 12 nm Hydrogen-Alpha narrowband filter. The data were shot through a 130/910mm refractor with a stock Pentax K3ii.

Processing in Astro Pixel Processor and Photoshop CC2018

Just amazing. This detail is astonishing for the telescopic view that it captures. Congratulations.

**Pete_XL** · 10-02-2019, 11:49 AM

Originally posted by Ash

Just amazing. This detail is astonishing for the telescopic view that it captures. Congratulations.

Glad you like it,

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10-05-2018, 09:25 PM	#2
GeoJerry Veteran Member Join Date: Dec 2011 Location: Santa Barbara, CA Photos: Gallery Posts: 5,158	This one is also cool but I wish I could view these side by side on a large monitor so that I could see how your two posts compare.

10-06-2018, 12:15 AM	#3
Pete_XL Site Supporter Join Date: Mar 2010 Location: Germany Photos: Gallery Posts: 335 Original Poster	Originally posted by GeoJerry This one is also cool but I wish I could view these side by side on a large monitor so that I could see how your two posts compare. In this case they only differ in color because I took the black&white hydrogen alpha data for 100% of the luminance information. So it delivers all of the details and contrast. The color shot was taken only for the color values and distribution.

10-02-2019, 06:28 AM	#4
Ash Loyal Site Supporter Join Date: Mar 2007 Location: Toowoomba, Queensland Photos: Gallery \| Albums Posts: 23,920	Originally posted by Pete_XL Melotte 15 is a cluster of young stars in the mid of the cloud complex IC1805 - the Heart Nebula - in the constellation Cassiopeia. This is a so called narrowband image. Galactic cloud complexes that contain hydrogen-alpha gas send out light of a deep red wavelength when they receive strong radiation of nearby stars. The narrowband filter only lets through this wavelength and closes out all other colors and so also the light pollution. The image was made from 56 images of 600s exposure @ ISO 800 with 12 nm Hydrogen-Alpha narrowband filter. The data were shot through a 130/910mm refractor with a stock Pentax K3ii. Processing in Astro Pixel Processor and Photoshop CC2018 Just amazing. This detail is astonishing for the telescopic view that it captures. Congratulations.

10-02-2019, 11:49 AM	#5
Pete_XL Site Supporter Join Date: Mar 2010 Location: Germany Photos: Gallery Posts: 335 Original Poster	Originally posted by Ash Just amazing. This detail is astonishing for the telescopic view that it captures. Congratulations. Glad you like it,