NGC 6401 — Globular Cluster in Ophiuchus
Good (46/100)
Observe
1Properties
Magnitude
9.5
Angular Size
4.5′
pB, pL, R, *12 f inv
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Position & Identifiers
2How easy to spot?
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| Telescope | Bortle 3 | Bortle 4 | Bortle 5 |
|---|---|---|---|
| 80 mm refractor 80mm refr. | Medium+ | Medium+ | Medium |
| 150 mm Newton 150mm Newt. | Easy | Easy | Easy |
| Celestron C8 (203 mm SCT) 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
May – Jul
(peak: Jun)
4
Eyepiece View
125x
TFOV: 0.4°
Lim. mag: 13.6
NGC 6401 · 4.5′ diameter · N up, E left
5
Best Magnification
Explore
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 6469
Open cluster
Open Cluster
mag 8.0
3.7°
Sagittarius
NGC 6355
Compact globular cluster
Globular Cluster
mag 9.6
4.1°
Ophiuchus
NGC 6440
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 9.7
4.3°
Sagittarius
3 Sgr
Pulsating variable, period 7.0d
Variable Star
mag 4.54
4.4°
Sagittarius
NGC 6325
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 10.7
4.7°
Ophiuchus
NGC 6342
Globular cluster — dense ball of ancient stars
Globular Cluster
mag 9.9
5.9°
Ophiuchus
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Ophiuchus
Mythology, bright stars, and deep-sky highlights.
Constellation
