By SERGEI TIMOFEEVSKI | 2024-12-04

The Bear Claw nebula
On 12/03/2024 11:30 pm by Steven Bellavia | Website | Smithfield, VA
SH2-200 (Sharpless 2-200), HDW 2 (Hartl-Dengl-Weinberger 2), also called the Bear claw nebula, is a large but very faint planetary nebula in Cassiopeia. This nebula was first discovered by the astronomer Stewart Sharpless in 1959 who included it in his catalogue of HII regions under the name of Sh2-200. In 1983, Sh2-200 was included in the HDW catalogue of possible planetary nebulae by the astronomers Herbert Hartl, Johann Dengel and Ronald Weinberger.
I do not know what causes the striations, or if the reddish surrounding gas is part of this nebula, or which is the progenitor star, but I hope to get that information and pass it on, when I can.
Telescope: TSO-115mm Triplet f/7 refractor with TSO 0.79X reducer-flattener, bringing it to f/5.6, 640mm focal length
Camera: ZWO ASI 294MM Pro, cooled to -10C
Sky-Watcher EQ6-R Pro equatorial mount
- Antlia 4.5nm Ha, 50 x x 300 seconds, Gain 121 BIN 2
- Antlia 4.5nm OIII, 46 x x 300 seconds, Gain 121 BIN 2
- 25 Flat Frames, 25 Dark-Flat Frames and 30 Dark Frames for each set
processed in PixInsight