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IC 4931 — Galaxy in Sagittarius

Galaxy Fair (27/100)

Elliptical

Magnitude 11.9m Galaxy Sagittarius (Sgr) Visible
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1Properties

Magnitude 11.88
Angular Size 2.3′ × 1.4′
Position Angle 135°
Distance 281.09 million ly
Galaxy Type Elliptical (E)
eeF, pS, R, *8 f 20s , f of 2

Position & Identifiers

RA 20h 00m 50.4s
Dec -38° 34' 30.4"
Constellation Sagittarius (Sgr)
Catalog IC 4931

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard+ Hard Hard
150mm Newt. Medium+ Medium Hard+
C8 203mm Easy Medium+ Medium
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 Jun – Aug (peak: Jul)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

IC 4931 · 2.3′×1.4′ · 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.

IC 4926
Hard
Elliptical galaxy
Galaxy mag 13.10 0.1° Sagittarius
IC 4913
Hard
Elliptical galaxy
Galaxy mag 13.13 1.5° Sagittarius
NGC 6849
Medium
Elliptical galaxy
Galaxy mag 12.12 1.6° Sagittarius
IC 4991
Medium
Bright spiral galaxy
Galaxy mag 11.54 4.2° Sagittarius
M55
NGC 6809
Easy
Large bright globular cluster
Globular Cluster mag 7.0 8.7° Sagittarius
Arkab Prior
HIP 95241; Beta1 Sagittarii
Easy
Easy double, sep 28.3″
Double Star mag 4.01 9.2° Sagittarius
Show on Map

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