LDN 1622
Dark Nebula in the Constellation Orion
From Wikipedia, the free encyclopedia
LDN 1622 (also known as Boogeyman Nebula) is a dark nebula and is part of Barnard's loop in the Orion Molecular Cloud Complex located in the constellation of Orion.[3][4] It is a dense molecular cloud of cold gas and dust that obscures light from background stars and emission regions.[4][5]
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| Nebula | |
|---|---|
| Dark Nebula | |
Image of LDN 1622 from Kitt Peak National Observatory | |
| Observation data: J2000.0 epoch | |
| Right ascension | 05h 54m 28.00s[1] |
| Declination | +01° 48′ 12.0″[1] |
| Distance | 1,400[2] ly |
| Constellation | Orion |
Observation
As a dark nebula, LDN 1622 is challenging to observe visually or photographically and requires dark skies, long exposures, and often narrowband hydrogen-alpha imaging to reveal it against faint background emission.[3][6] It is frequently imaged alongside LDN 1621 together known as Orion East Cloud and the reflection nebulae vdB 62 and vdB 63.[7]
LDN 1622 has been studied as a source of anomalous microwave emission (AME). High-resolution observations with Green Bank Telescope at 4.85 GHz and 13.7 GHz revealed a 13.7 GHz AME flux density of 7.0±1.4 mJy,[8] with a rising spectrum toward higher frequencies consistent with the spinning-dust model.[9][8]
