Deep Sky Object in Summer
M17 (Omega Nebula in Sagittarius)


Date & Time: May 4 2013, from 24:34 to 25:32 JST(+0900)
Composed 8 shots with 8 minutes exposed
Optical: TAKAHASHI 16cm(6.3") epsilon (f=530mm, F3.3)
with Astronomik CLS-CCD filter
Auto-guided with TAKAHASHI JP Equatorial & SBIG STV
Digital Camera: Canon EOS 550D (Remodeled)
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)
Sensitivity...ISO1600




M17 (NGC6618) / Diffused Nebula, type 1 E
R.A.18h 20m 48.0s (2000.0)
Dec.-16° 11' 00" (2000.0)
Apparent Size46×37'
Real Size43×35 light yrs.
Magnitude7.0
Distance3300 light yrs.
Other IDsSh2-45, LBN60
M17 is a diffused nebula in Sagittarius positioned about 2.5 degrees south of M16(Eagle Nebula) in previous page. M17 has several nicknames of "Swan Nebula" or the "Omega Nebula", this name came because the shape of the deep part of nebula resemble a Greek letter of omega. And occasionally, the nebula is known as the "Horseshoe Nebula". We can observe the nebula with a size of about 40arc minutes and 3300 light years away.

⇒ Display the spectral profile of M17
(in new window)




M16(Eagle Nebula)

M24(Star-cloud in Sagittarius)


Copyright(c) 2013 by Naoyuki Kurita, All rights reserved.
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