NGC 1491. Sh2-206. The Fossil Footprint Nebula

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NGC 1491, usually known as Sh2-206 or the Fossil Footprint Nebula, is an emission nebula located at about 10,700 light years in the constellation Perseus. The nebula is ionized by BD +50 886, an 11.2 magnitude star located just left of the center of this image and about in the center of the carved “cave” in the gas cloud around it. Just around this star, there is a faint, small oval bubble that, physically but not in size, is very similar to the Bubble Nebula (NGC 7635). This image has been taken with narrowband filters and color-mapped to a slightly modified Hubble Color Palette.


Additional Information


Name(s): NGC 1491. Sh2-206. Fossil Footprint Nebula

Type: Emission Nebula

RA:  04h 03m 16s

Dec: +51º 18’ 54”

Constellation: Perseus

Size (arcmin): 9×6 arcmin

Magnitude: ND

Distance: 10,700 ly


Date: 2022-11-12 to 2023-01-25

Location: Curiosity2 Observatory, New Mexico Skies, Mayhill, NM, USA

Size (arcmin): 20×23 arcmin

Telescope: 24” (61 cm) f/6.5 Reflector

Camera: FLI PL16803 (4096x4096pix)

Guiding: Astrodon MonsterMOAG off-axis guider

Total exposure: 31 hours (Ha: 13h 20m; OIII: 8h; SII: 6h 40m; RGB: 3h)

Processing: CCDStack, PixInsight (one step) and Photoshop CC 2023


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