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NGC 6658 — Galaxy in Hercules

Galaxy Fair (37/100)

Lenticular

Magnitude 12.9m Galaxy Hercules (Her) Visible
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1Properties

Magnitude 12.9
Angular Size 1.5′ × 0.2′
Position Angle 5°
Distance 191.63 million ly
Galaxy Type Lenticular (S0-a)
F, vS, lE

Position & Identifiers

RA 18h 33m 54.0s
Dec +22° 52' 60.0"
Constellation Hercules (Her)
Catalog NGC 6658

2How easy to spot?

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

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

Medium on Seestar S50

3Visibility

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Best season May – Jul (peak: Jun)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 6658 · 1.5′×0.2′ · N up, E left

5 Best Magnification

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6 Surface Brightness

7 Morphology Decoder

8 Inclination & True Shape

9 Redshift

10 Size Comparator

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11

Light Travel Time Machine

12

Relativistic Travel

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 6660
Hard+
Bright spiral galaxy
Galaxy mag 12.36 0.2° Hercules
NGC 6674
Hard+
Barred spiral galaxy
Galaxy mag 12.1 2.7° Hercules
NGC 6710
Hard+
Bright spiral galaxy
Galaxy mag 12.8 5.5° Lyra
NGC 6587
Medium
Elliptical galaxy
Galaxy mag 12.1 6.2° Hercules
FF Aql
Medium
Pulsating variable, period 4.5d
Variable Star mag 5.38 7.9° Aquila
NGC 6743
Easy
Open cluster
Open Cluster mag 8.20 8.9° Lyra
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