Targets / M23
Astrophotoguru · Open Cluster M23
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M23

M23 — Open Cluster M23

Open Cluster
· Sagittarius
Beginner
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Observing: Tonight · 8:00 PM–5:00 AM

Observability

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Overall Imaging Recommendation

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Target information

Object type
Open Cluster
Constellation
Sagittarius
Right ascension
17h 56m 48s
Declination
-19° 01′ 00″
Magnitude
5.5
Angular size
27′
Surface brightness
Not recorded
Difficulty
Beginner
Best months
Jun-Sep
Catalog IDs
M23

Recommended telescopes

Celestron
1500mm f/10.0 · 150mm aperture
Frames 50% of APS-C FOV
TEC
1600mm f/8.0 · 200mm aperture
Frames 53% of APS-C FOV
Astro-Tech
1624mm f/8.0 · 203mm aperture
Frames 54% of APS-C FOV
TEC
1345mm f/9.6 · 140mm aperture
Frames 45% of APS-C FOV
TEC
1260mm f/7.0 · 180mm aperture
Frames 42% of APS-C FOV
Stellarvue
1200mm f/7.9 · 152mm aperture
Frames 40% of APS-C FOV

Recommended cameras

QHYCCD
3.76µm pixels · cooled
Player One
4.63µm pixels · cooled
ZWO
5.94µm pixels · cooled
OGMA
3.76µm pixels · cooled
OGMA
3.76µm pixels · cooled
ToupTek
2.90µm pixels · cooled

Example framing

FOV 0.73° × 0.50°
Scale 0.64″/px
Target fills 91% of frame
Preview in planner
FOV 0.68° × 0.47°
Scale 0.60″/px
Target fills 97% of frame
Preview in planner
FOV 0.83° × 0.55°
Scale 0.48″/px
Target fills 81% of frame
Preview in planner

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