Sh2-227 in Auriga

© Velimir Popov & Emil Ivanov 2020
Size: 1600 px

This little-studied nebula is ionised by the O9 V star LS V +38 12. It appears behind the western edge of the Aur OB1 association in the outer galaxy (Avedisova, V. S. & Kondratenko, G. I.,1984). The estimated distance to the nebula is 4300 pc [Blitz, Fich, Stark 1982], or 3810 pc +/- 1000 [Avedisova, Kondratenko, 1984]. The open cluster right of the nebula is NGC 1857.


Image details:


Center of field RA 05:20:00 (h:m:s)
Center of field DE +38:57:19 (deg:m:s)
Size 1.63 x 1.2 (deg)
Pixel scale: 2.96 (arcsec/pixel)
Orientation: Up is 247 degrees E of N
Charts and image details obtained from
Optic(s): 12" ASA Astrograph at F/3.6
Mount: ASA DDM85 Standard
Camera: SBIG STL 11000 M
Filters: Luminance, Red, Green, Blue, Astronomik filters; Ha Baader filter
Dates/Times: 9. Oct. 2018
Location: IRIDA Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exp. Details: ;L:6x10min, R:6x10 min, G:6x10 min, B:6x10 min;Ha:6x15 min;; Bin 2 Total exp.time: 330 min. (5:30 hrs)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2020. All Rights Reserved
click tracking