Barnard's Loop (Sh2-276) in Orion

This huge and faint envelope of glowing hydrogen encircles center of Orion and it is a lot larger than marked on finder chart below, almost reaching Rigel. It probably corresponds to intersteller buble or supernova remnant. It is hard to notice even in rich field telescopes, however easily shows up on wide field astrophotographs.

The above image is derived from the red channel only of the scanned slide image taken from Sharon Creek Conservation Area near London,,Ontario on January 21, 1996. Ektachrome P1600 was used for the original 2 min. exposure with 50mm f2.8 SLR camera piggybacked on a Celestron Ultima 8 SCT.

North is up.

Map created in Guide 7.0 - 15° x 15°. North is up.

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© Jan Wisniewski