IC 434 - 4.2.2021 at 23.00 Komakallio, Kirkkonummi Observation number 96517

• Observation target
• • Deep space object
• Designation
• • IC 434
• • Näyttävä

• Constellation
• • Orion
• Nebulae
• • Dark nebula

    Dark nebulae are dust in space. It obsruct the visibility of background star and bright nebulae. Thus, the dark nebulae are seen as dark clouds in space.

     

    

    The Horsehead Nebula is a dark nebula. Image Arto Murtovaara.

     

    

    The dark nebula LDN 1235 in Cepheus. Image Juha Kepsu.

     

    

    The dark nebula LDN 1302. Image Tero Turunen.

     

    

    The NGC 1333 is a reflection nebula, which includes also dark nebulae. Image Samuli Vuorinen.

  • 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, Atik 460EX, Astrodon 5 nm narrowband filters, iOptron CEM60 stand. Exposure for a total of 12 hours in 10 minute increments.

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