Image Description and Details : Sh2-261, also known as Lower’s Nebula (after Harold and Charles Lower discovered it in 1939), is an emission nebula found on the outermost edge of our Milkyway between the Orion and Perseus arm.

APM SD Apo (Fpl53) 140 F4,6 (644 mm)
ZWO ASI 533MC Pro + iOptron GEM45

Feb 2023
Optolong L-Ultimate (3 nm): 111X600"
Optolong Uv Ir cut: 30X60” (star color)
Tot: 19h

Modena (Sqm 18.3-18.9 Bortle 7,5-8), Italy

Copyright: Andrea Arbizzi

Image Description and Details :
Lower's nebula (Sh2-261) is found on the outermost edge of our Milkyway between the Orion and Perseus arm. Sh2-261 is a large faint region of predominantly ionized hydrogen. The nebula is named after Harold and Charles Lower who discovered this nebula in 1939.
Embedded within Sh2-261 is LBN 862 and LBN 864. Also there are several dark nebulae in this field.

Imaging telescopes or lenses: Takahashi FSQ130ED
Imaging cameras: QSI 6120i
Mounts: Takahashi EM 400 Temma 2M
Guiding telescopes or lenses: Takahashi FS60CB
Guiding cameras: QHY CCD QHY 5 II
Focal Extender / Reducer: Tak QE 0.73x
Software: PHD 2, Pleiades Astrophoto PixInsight , Astro Pixel Processor (for stacking), Sequence Generator Pro SGP (for capture)
Filters: Astrodon Ha, SII, OIII,
Accessories: Robofocus Focuser, ATIK EFW3

Original Resolution: 3600x 2400
Dates: 3rd Nov - 8th Nov '21

Frames:
Astrodon Ha 18 x 20'
Astrodon SII 24 x 20'
Astrodon OIII 30 x 20'
​Total Time: 24 Hours

Center (RA, Dec): (92.351, 15.689)
Center (RA, hms): 06h 09m 24.153s
Center (Dec, dms): +15° 41' 18.668"
Size: 80.7 x 53.8 arcmin
Radius: 0.808 deg
Pixel scale: 1.34 arcsec/pixel
Orientation: Up is 180 degrees E of N

Copyright: Brendan Kinch