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LBN 487 and NGC 7023: Iris Nebula in Cepheus

RA = 21 hrs 1 min; Dec = +68 deg 10 min.

Date & Site:

Imaged on 9/15/2012; Palomar Mountain, CA

Conditions: mild wind; 60 degrees; very good seeing


Telescope: Takahashi FSQ106 at F5 (fl= 530mm)
Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10; internally guided


Exposures: 90 min Lum; 45 min each RGB (in 5 min subs)

FOV =96 x 65 arc minutes (reduced 60% of original size)

Known as the Iris nebula because it resembles the flower, NGC7023 is actually the open cluster at the center of the nebula. LBN 487 is the designation of the reflection nebula. The bright reflection nebula is lit by the mag 7.4 star SAO 19158 Its blue color is characteristic of dust and grains reflecting starlight. This wide field image also shows the surrounding dense dust lanes extending more than 20 light years across.

1,300 light years away

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