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NGC 6139 — Globular Cluster in Scorpius

Globular Cluster Good (46/100)
Magnitude 9.2m GlobularCluster Scorpius (Sco) Visible
Star Map
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1Properties

Magnitude 9.2
Angular Size 4.5′
B, pL, R, psbM, rr

Position & Identifiers

RA 16h 27m 42.0s
Dec -38° 51' 00.0"
Constellation Scorpius (Sco)
Catalog NGC 6139

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Easy Medium+ Medium+
150mm Newt. Easy Easy Easy
C8 203mm Easy Easy Easy
Easy Medium Hard Very hard Impossible

Bortle 3 = rural · 4 = outer suburbs · 5 = suburbs

Easy on Seestar S50

3Visibility

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Best season Apr – Jun (peak: May)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 6139 · 4.5′ diameter · N up, E left

5 Best Magnification

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6 Classification Decoder

Nearby in the Sky

Other targets within a few degrees — pan your scope a little and keep exploring.

Visibility scores assume a 150 mm Newton at Bortle 4.

NGC 6124
Easy
Rich open cluster
Open Cluster mag 5.8 1.9° Scorpius
V856 Sco
Medium
Variable star, range 7.0–7.7
Variable Star mag 7.05 3.7° Scorpius
V918 Sco
Hard+
Hot blue O-type star
Double Star mag 5.47 4.3° Scorpius
NGC 5986
Easy
Globular cluster — dense ball of ancient stars
Globular Cluster mag 7.1 8.2° Lupus
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