Deep Sky Object in Summer
Sh2-22 (Diffused Nebula in Sagittarius)

Click on image to enlarge

Date & Time: Apr 30 2025, from 24:56 to 26:53 JST(+0900)
Composed 9 shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
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.: -15°C)
Location: Furudono town, Fukushima pref.

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


Sh2-22 / Diffused Nebula, type 4 E
R.A.17h 53m 50.0s (2000.0)
Dec.-25° 00' 00" (2000.0)
Apparent Size80×50'
Real Size68 light yrs.
Magnitude -
Distance3900 light yrs.
Other IDsLBN14
Sh2-22 is a faint emission nebula positioned at only 3 degrees southwest of the Lagoon Nebula (M8) in Sagittarius. Although the nebula has fairly larger size of about 80×50 arc minutes, little known because of its faintness figure. The nebula has a dark gaseous matter obstructing in central region, looks like divided into two parts of northeast and southwest. The nebula is floating around 4000 light years away toward the galactic center.



Around Sh2-16
Vast nebula around zeta Oph(Sh2-27)

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