NGC 6888 - 26.7.2019 at 04.00 Fregenal de la Sierra, Espanja Observation number 84589

• Observation target
• • Deep space object
• Designation
• • NGC 6888
• • Keskitaso

• Constellation
• • Cygnus
• Nebulae
• • Planetary nebula

    Planetary nebula is the remnant of a death star. It could be ring-shaped, disc-like or spread out rather irregularly.

    With the exception of some nearest objects planetary nebulae have a small apparent diameter and they need a rather big instrument to be visible.

     

    

    Planetary nebula M27 aka The Dumbbell Nebula in Vulpecula. Image Juha Parvio.

     

    

    M76 aka The Little Dumbbell Nebula in Perseus. Image Rauno Päivinen.

  • Emission nebula

    In an emission nebula the hot stars nearby cause the gas glow. This should not mix with reflection nebula, where the gas is only lit up by nearby stars.

    The appearance of a gas nebula is irregular, and the fainter parts of it need bigger instruments to be visible.

     

    

    Emssion nebulae in Cepheus. The bigger part is composed of the nebulae Cederblad 214 (Ced214) and NGC 7822. The lower round nebula is called Sharpless 170 (Sh2-170). Image J-P Metsävainio.

     

    

    The Orion nebula. Image Samuli Vuorinen.

     

    

    In this 4-degree-field there are emission nebulae Sh2-157, Sh2-158, Sh2-159, Sh2-161 and Sh2-162 (or NGC 7635 aka Bubble Nebula) and open clusters M52 and NGC 7510. Image Juha Kepsu.

     

    

    NGC 281 aka Pacman Nebula. The object is in Cassiopeia. Image J-P Metsävainio.

     

    

    NGC 896 in Cassiopeia is the tip of Heart Nebula (IC 1805). Image Timo Inkinen.

Sky-Watcher Esprit 100ED, 10 Micron GM 1000 HPS, Atik 460EX, 80x10min Ha, 55x10min OIII, 90x3min RGB total approx. 27 hours

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