Deep Sky in Summer
Sh2-3 (Diffused Nebula in Scorpius)

Click on image to enlarge

Date & Time: May 4 2022, from 24:58 to 25:54 JST(+0900)
Composed 8 shots with 8 minutes exposed
Optical: PENTAX 7.5cm(2.9") ED refractor with conversion lens (f=360mm, F4.8)
with IDAS LPS-D1 Light-pollution suppression filter
Auto-guided with TAKAHASHI EM-200 Equatorial & Lacerta M-GEN
CMOS Camera: ZWO ASI2600MC Pro (Cooled temp.: -20°C)
Location: Koumi town, Nagano pref.

Camera Settings: Recording format...16bit FITS, converted to 16bit TIFF(6248×4176)
Device Size...23.5×15.7mm, Gain...100


Sh2-3 / Diffused Nebula, type E
R.A.17h 12m 21.0s (2000.0)
Dec.-38°29' 00" (2000.0)
Apparent Size7.3×5.5'
Real Size10 light yrs.
Magnitude -
Distance4370 light yrs.
Other IDsGum 58, RCW 120
Sh2-3 is a small but bright H-alpha emission nebula in the southern part of Scorpius. You can find out about 3 degrees southwest of NGC6334, the Cat's paw nebula at the tip of poison needle of Scorpion. The nebula has an elliptical shape and a central dark lane is dividing in north and south parts. In addition, we can see that large-scaled but indistinct H-alpha clouds are surrounding the nebula. An open cluster in right edge is NGC6281.



Sh2-1, Sh2-7
Around Sh2-16

Copyright(c) 2022 by Naoyuki Kurita, All rights reserved.
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