- Date: 26 August 2016
- Camera: Atik 4000
- Optics: ASA N250
- Filters: Astrodon LRGB
- Exposure: L 15 x 300s 1×1, RGB 7 x 150s 2×2 each
One of the cosmic deep sky treasures to be found in the inconspicuous constellation of Lacerta is the dust cloud LBN 437. Its most prominent feature is a symmetrical reflection nebula associated with the Herbig Ae/Be star LkHa 233, which is also catalogued as V375 Lacertae. This star is also host to a bipolar jet and professional observations have detected multiple small Herbig Haro objects.
LBN 437 is associated with the very large faint emission nebula Sh2-126, which is ionized by the star 10 Lacertae. In a wider galactic context, the whole region is part of the Lacerta OB1 association. LBN 437 belongs to the class of cometary globules, which is a result of its environment.
Cometary globules are so-called due to the ‘head-tail’ morphology visually reminiscent of comets in the solar system. Their development is attributed to the effects of intense radiation from bright energetic OB-type stars on dense cloud cores that are furthermore components of giant molecular clouds.
LBN 437 is estimated to be about 1200 light years away but there have been multiple distance estimations based on many different methods. Whilst it makes a perfect target for astrophotographers, it is possible to visually observe the X-shaped reflection nebula.
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