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M103

M103 — Open Cluster M103

Open Cluster
· Cassiopeia
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
Cassiopeia
Right ascension
1h 33m 24s
Declination
+60° 42′ 00″
Magnitude
7.4
Angular size
6′
Surface brightness
Not recorded
Difficulty
Beginner
Best months
Sep-Feb
Catalog IDs
M103

Recommended telescopes

Celestron
3910mm f/11.0 · 356mm aperture
Frames 29% of APS-C FOV
Celestron
2800mm f/10.0 · 279mm aperture
Frames 21% of APS-C FOV
Meade
2540mm f/10.0 · 254mm aperture
Frames 19% of APS-C FOV
Astro-Tech
2432mm f/8.0 · 305mm aperture
Frames 18% of APS-C FOV
Takahashi
2415mm f/11.5 · 210mm aperture
Frames 18% of APS-C FOV
Celestron
2350mm f/10.0 · 235mm aperture
Frames 17% 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 0.34° × 0.23°
Scale 0.20″/px
Target fills 43% of frame
Preview in planner
FOV 0.48° × 0.32°
Scale 0.28″/px
Target fills 31% of frame
Preview in planner
FOV 0.43° × 0.29°
Scale 0.38″/px
Target fills 34% of frame
Preview in planner

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