IC 417 (Sh2-234), NGC 1931 (Sh2-237) in Auriga

© Velimir Popov & Emil Ivanov 2020
Size: 1600 px

IC 417 (Sh2-234) is sometimes called the Spider nebula. Sharpless 2-234 and 2-237 are together sometimes called the Spider and the Fly. IC 417 surrounds the star cluster Stock 8. Avedisova gives two ionising stars: HD 35619 (O7V) and BD +34 1054 (B0 IV). SIMBAD gives O9.5V for this second star. This two objects together with Sh2-231-33 form a complex of HII regions located together in the Perseus arm in the outer galaxy. This complex may be associated with an old (330 thousand years) supernova remnant.


Image details:


Center of field RA 05:29:48 (h:m:s)
Center of field DE +34:32:17 (deg:m:s)
Size 1.65 x 1.28 (deg)
Pixel scale: 2.96 (arcsec/pixel)
Orientation: Up is 76.6 degrees E of N
Charts and image details obtained from Astrometry.net
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: 4, 5. Mar. 2017
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:16x15 min;; Bin 2 Total exp.time: 480 min. (8:00 hrs)
More details: Dark and flat frames reduction
Processing: PixInsight / PS
Copyright: Velimir Popov and Emil Ivanov 2020. All Rights Reserved
e-mail: info@irida-observatory.org
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