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NGC 3557 — Galaxy in Centaurus

Galaxy Fair (39/100)

Elliptical

Magnitude 10.4m Galaxy Centaurus (Cen) Visible
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1Properties

Magnitude 10.4
Angular Size 4.4′ × 3.4′
Position Angle 32°
Distance 141.50 million ly
Galaxy Type Elliptical (E)
B, S, R, pgmbM, 1st of 3

Position & Identifiers

RA 11h 09m 57.6s
Dec -37° 32' 21.1"
Constellation Centaurus (Cen)
Catalog NGC 3557

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Medium+ 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

Medium on Seestar S50

3Visibility

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Best season Feb – Apr (peak: Mar)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 3557 · 4.4′×3.4′ · 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

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