SH2-84 is a faint emission nebula located approximately 16,300 light years from Earth in the constellation of Sagitta, the Arrow. It is a member of the Sharpless catalogue of emission nebulae which contains 313 entries representing H-II emission nebulae with a declination of -27 degrees or above, compiled by American astronomer Stewart Sharpless in 1959.
There are several blue, white, yellow, and red stars in this image, however, I suspect many of the stars appear reddish because of the gas and dust in this region.
SH2-84 - Ha Region in SagittaHome Monroe, CT
Date: 8-30-19, 9-3-19, 9-4-19, 9-7-19, 9-10-19
Camera: ZWO ASI1600MM-Pro
Telescope: Astro-Tech AT115EDT 115mm Refractor Telescope
Focal Length: 805mm
Focal Reducer: Astro-Tech 0.8x Focal Reducer/Field Flattener for Refractor Telescopes
Mount: Orion Sirius EQ
Filter Wheel: ZWO EFW 8x 1.25"
Filter: ZWO Ha, R, G, B
Focuser: ZWO EAF
Autoguiding: QHY-5L-II-M attached to an Agena 50mm Guide Scope with Helical Focuser
Exposure: Ha 73 x 180s, R 33 x 90s, G 31 x 90s, 32 x 90s
Temp: 17 C
Post Processing: PixInsight, Photoshop