When is the best time to observe IC 4923?

IC 4923 is best observed from June through August, with peak visibility during July when it transits around midnight in the Northern Hemisphere.

Where is IC 4923 located in the sky?

IC 4923 lies in the constellation Telescopium at right ascension 20h 01m and declination -52° 38′.

What telescope do I need to see IC 4923?

At magnitude 13.7, IC 4923 is a challenging target that needs at least an 8-inch (200 mm) telescope and dark skies.

IC 4923 — Galaxy in Telescopium

Galaxy Fair (29/100)

Lenticular

Magnitude 13.7^m Galaxy Telescopium (Tel) Visible

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1Properties

Magnitude 13.68

Angular Size 1.0′ × 0.9′

Position Angle 97°

Distance 312.18 million ly

Galaxy Type Lenticular (S0)

Description

bM, mag 14

Position & Identifiers

RA 20h 00m 60.0s

Dec -52° 37' 60.0"

Constellation Telescopium (Tel)

Catalog IC 4923

2How easy to spot?

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Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	V. hard+	V. hard	V. hard
150 mm Newton 150mm Newt.	Hard	V. hard+	V. hard+
Celestron C8 (203 mm SCT) C8 203mm	Hard+	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 Jun – Aug (peak: Jul)

4 Eyepiece View

Telescope Eyepiece

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125x TFOV: 0.4° Lim. mag: 13.6

Seeing Bortle

IC 4923 · 1.0′×0.9′ · 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

Discover

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.

Xi Tel

Easy

Cool red giant

Star mag 4.94 1.0° Telescopium

NGC 6854

Hard+

Elliptical galaxy

Galaxy mag 13.0 1.9° Telescopium

IC 4889

Medium

Elliptical galaxy

Galaxy mag 12.0 2.9° Telescopium

NGC 6812

Hard+

Bright spiral galaxy

Galaxy mag 12.72 3.6° Telescopium

IC 4943

Hard+

Elliptical galaxy

Galaxy mag 12.67 4.3° Telescopium

NU Pav

Hard+

Semi-regular variable, range 4.9–5.3

Variable Star mag 5.13 6.7° Pavo

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