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Sh2-200 / HDW2 Bearclaw Nebula - HOO

Technical card

Resolution: 1800x1436

Dates:Sept. 25, 2018Nov. 5, 2018

Astrodon 36mm Ha (5nm) OIII (5nm): 185x180" (gain: 99.00) -20C bin 1x1
Astrodon 36mm Ha (5nm) OIII (5nm): 76x300" (gain: 99.00) -20C bin 1x1

Integration: 15.6 hours

Avg. Moon age: 21.21 days

Avg. Moon phase: 52.72%

Bortle Dark-Sky Scale: 4.00

Temperature: 10.00 job: 2356953

RA center: 47.745 degrees

DEC center: 62.792 degrees

Pixel scale: 0.700 arcsec/pixel

Orientation: 88.282 degrees

Field radius: 0.224 degrees

Locations: Dark Star Observatory, Taos, New Mexico, United States

Data source: Own remote observatory

Remote source: Non-commercial independent facility


Imaged on nights of 9/23/2018, 9/27/2018, 9/28/2018, 9/29/2018, 11/5/2018, 11/6/2018.

Sharpless 2-200, also known as HDW 2 (Hartl-Dengl-Weinberger 2), commonly called the "Bearclaw nebula", is a quite old planetary nebula (PN) in the constellation Cassiopeia.
According to W. A. Weidmann and R. Gamen, who have examined the central stars of different PNs, the central star of HDW 2 is a binary star.



Jerry Macon

Sky plot

Sky plot


Sh2-200 / HDW2 Bearclaw Nebula - HOO, 


            Jerry Macon