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M55

M55 — Globular Cluster M55

Globular 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
Globular Cluster
Constellation
Sagittarius
Right ascension
19h 40m 00s
Declination
-30° 58′ 00″
Magnitude
6.3
Angular size
19′
Surface brightness
Not recorded
Difficulty
Beginner
Best months
Jul-Sep
Catalog IDs
M55

Recommended telescopes

Celestron
2032mm f/10.0 · 203mm aperture
Frames 48% of APS-C FOV
Celestron
2032mm f/10.0 · 203mm aperture
Frames 48% of APS-C FOV
Meade
2032mm f/10.0 · 203mm aperture
Frames 48% of APS-C FOV
Celestron
2032mm f/10.0 · 203mm aperture
Frames 48% of APS-C FOV
Astro-Tech
2000mm f/8.0 · 254mm aperture
Frames 47% of APS-C FOV
Celestron
2350mm f/10.0 · 235mm aperture
Frames 55% 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 0.66° × 0.44°
Scale 0.38″/px
Target fills 72% of frame
Preview in planner
FOV 0.54° × 0.37°
Scale 0.47″/px
Target fills 86% of frame
Preview in planner
FOV 0.54° × 0.37°
Scale 0.47″/px
Target fills 86% of frame
Preview in planner

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