Deep Sky Object in Summer
Around NGC6723 (Globular Cluster in Sagittarius)

Click on image to enlarge

Date & Time: Jul 1 2022, from 22:58 to 23:39 JST(+0900)
Composed 6 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.: -10°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



Date & Time: Aug 17 2018, from 21:12 to 21:22 JST(+0900)
Composed 4 shots with 3 minutes exposed
Optical: Meade 25cm(10") Schmidt-Cassegrain with conversion lens (f=1600mm, F6.3)
with BaaderPlanetarium Moon&Skyglow filter
Auto-guided with Meade LX200 Equatorial & Pictor 201XT
Digital Camera: Nikon D810A
Location: Ooizumi, Hokuto city, Yamanashi pref.

Camera Settings: Recording Format...14bit CCD-RAW, converted to 16bit TIFF(4080×4080)
Device Size...20×20mm
Sensitivity...ISO4000, White Balance...Daylight


NGC6723 / Globular Cluster
R.A.18h 59m 36.0s (2000.0)
Dec.-36° 38' 00" (2000.0)
Apparent Size5.8'
Real Size49 light yrs.
Magnitude6.0
Distance33 thousand light yrs.
NGC6723 is a medium sized globular cluster positioned in northern region of Corona Austrina. But this cluster is belonging to the constellation of Sagittarius. The globular has an apparent diameter of about 6 arc minutes; you will be able to detect it as a nebula-like image by using of binoculars.
You can enjoy the flow of dark nebulae around the cluster because NGC6723 is lying near the Milky Way in summer. This image shows you that a black patch region has been spread out in south east of the cluster, this is a lump of dark gaseous matter obstructing the background fine stars. And a small-sized and whitish reflection nebulae are positioned at 30 arc minutes ESE of the cluster, which has numbers of NGC6726 and IC4812. The nebulae are glittering by reflecting light of star in front of dark nebula.

⇒ IC4812 & surrounding molecular cloud



NGC6712
NGC6934

Copyright(c) 2018, 2022 by Naoyuki Kurita, All rights reserved.
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