andredem1
iris_nebula
These cosmic clouds have blossomed 1,300 light-years away, in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers, though. Still, this deep telescopic image shows off the Iris Nebula's range of colors and symmetries, embedded in surrounding fields of interstellar dust. Within the Iris itself, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the reflection nebula glow with a faint reddish photoluminesence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The pretty blue petals of the Iris Nebula span about six light-years. The colorful field-of-view stretches almost five Full Moons across the sky.
[text from APOD 2016 May, 6]
Double setup
Takahashi FSQ-106, CCD Moravian G2-8300
Filters: Astronomik LRGB
Pentax SDHF, ASI 1600 MM pro
Date: sep 19-oct 15
Italy, Long 7°41'40"E, Lat 45°28'18"N. Sky 20,9-21,4
L 32 X 420 sec; RGB: 10 X 300 sec
Maxim DL 5
Voyager – Astrophotography Automation Software
Processing: CCDStack, Photoshop, Pixinsight
iris_nebula
These cosmic clouds have blossomed 1,300 light-years away, in the fertile starfields of the constellation Cepheus. Called the Iris Nebula, NGC 7023 is not the only nebula to evoke the imagery of flowers, though. Still, this deep telescopic image shows off the Iris Nebula's range of colors and symmetries, embedded in surrounding fields of interstellar dust. Within the Iris itself, dusty nebular material surrounds a hot, young star. The dominant color of the brighter reflection nebula is blue, characteristic of dust grains reflecting starlight. Central filaments of the reflection nebula glow with a faint reddish photoluminesence as some dust grains effectively convert the star's invisible ultraviolet radiation to visible red light. Infrared observations indicate that this nebula contains complex carbon molecules known as PAHs. The pretty blue petals of the Iris Nebula span about six light-years. The colorful field-of-view stretches almost five Full Moons across the sky.
[text from APOD 2016 May, 6]
Double setup
Takahashi FSQ-106, CCD Moravian G2-8300
Filters: Astronomik LRGB
Pentax SDHF, ASI 1600 MM pro
Date: sep 19-oct 15
Italy, Long 7°41'40"E, Lat 45°28'18"N. Sky 20,9-21,4
L 32 X 420 sec; RGB: 10 X 300 sec
Maxim DL 5
Voyager – Astrophotography Automation Software
Processing: CCDStack, Photoshop, Pixinsight