When is the best time to observe IC 4742?

IC 4742 is best observed from May through July, with peak visibility during June when it transits around midnight in the Northern Hemisphere.

Where is IC 4742 located in the sky?

IC 4742 lies in the constellation Pavo at right ascension 18h 42m and declination -63° 52′.

What telescope do I need to see IC 4742?

At magnitude 12.1, IC 4742 is a challenging target that needs at least an 8-inch (200 mm) telescope and dark skies.

IC 4742 — Galaxy in Pavo

Galaxy Fair (25/100)

Elliptical

Magnitude 12.1^m Galaxy Pavo (Pav) Visible

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1Properties

Magnitude 12.08

Angular Size 2.1′ × 1.7′

Position Angle 14°

Distance 211.62 million ly

Galaxy Type Elliptical (E)

Description

cF, vS, R, bM, F* inv

Position & Identifiers

RA 18h 41m 54.0s

Dec -63° 52' 00.0"

Constellation Pavo (Pav)

Catalog IC 4742

2How easy to spot?

Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	Hard+	Hard	Hard
150 mm Newton 150mm Newt.	Medium+	Medium	Hard+
Celestron C8 (203 mm SCT) C8 203mm	Medium+	Medium+	Medium

Easy Medium Hard Very hard Impossible

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

Medium on Seestar S50

3Visibility

Set a location in User Settings to see visibility data.

Best season May – Jul (peak: Jun)

4 Eyepiece View

Telescope Eyepiece

125x TFOV: 0.4° Lim. mag: 13.6

Seeing Bortle

IC 4742 · 2.1′×1.7′ · N up, E left

5 Best Magnification

Explore

6 Surface Brightness

7 Morphology Decoder

8 Inclination & True Shape

9 Redshift

10 Size Comparator

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Light Travel Time Machine

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 4765

Medium+

Elliptical galaxy

Galaxy mag 11.19 0.8° Pavo

IC 4731

Hard+

Bright spiral galaxy

Galaxy mag 12.69 1.0° Pavo

IC 4784

Hard

Bright spiral galaxy

Galaxy mag 12.89 1.4° Pavo

NGC 6684

Easy

Bright spiral galaxy

Galaxy mag 10.5 1.5° Pavo

Xi Pav

Medium

Easy double, sep 3.7″

Double Star mag 4.36 3.2° Pavo

Kappa Pav

Medium+

Variable star, range 3.9–4.8

Variable Star mag 4.44 3.7° Pavo

C93

NGC 6752

Easy

Large bright globular cluster

Globular Cluster mag 5.4 5.2° Pavo

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