When is the best time to observe NGC 1720?

NGC 1720 is best observed from October through December, with peak visibility during November when it transits around midnight in the Northern Hemisphere.

Where is NGC 1720 located in the sky?

NGC 1720 lies in the constellation Eridanus at right ascension 04h 59m and declination -07° 52′.

What telescope do I need to see NGC 1720?

At magnitude 13.0, NGC 1720 is a challenging target that needs at least an 8-inch (200 mm) telescope and dark skies.

NGC 1720 — Galaxy in Eridanus

Galaxy Fair (39/100)

Barred Spiral

Magnitude 13.0^m Galaxy Eridanus (Eri) Visible

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1Properties

Magnitude 13.0

Angular Size 2.0′ × 1.2′

Position Angle 85°

Distance 195.60 million ly

Galaxy Type Barred Spiral (SBab)

Description

pF, pL, lbM, 1726 nr

Position & Identifiers

RA 04h 59m 20.6s

Dec -07° 51' 32.4"

Constellation Eridanus (Eri)

Catalog NGC 1720

2How easy to spot?

Telescope	Bortle 3	Bortle 4	Bortle 5
80 mm refractor 80mm refr.	V. hard+	V. hard	V. hard
150 mm Newton 150mm Newt.	Hard+	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

Set a location in User Settings to see visibility data.

Best season Oct – Dec (peak: Nov)

4 Eyepiece View

Telescope Eyepiece

125x TFOV: 0.4° Lim. mag: 13.6

Seeing Bortle

NGC 1720 · 2.0′×1.2′ · N up, E left

5 Best Magnification

Explore

6 Surface Brightness

7 Morphology Decoder

8 Inclination & True Shape

9 Redshift

10 Size Comparator

Discover

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.

NGC 1726

Medium

Bright spiral galaxy

Galaxy mag 12.1 0.1° Eridanus

63 Eri

Easy

Colorful double, sep 297.9″

Double Star mag 5.38 2.4° Eridanus

NGC 1700

Medium+

Elliptical galaxy

Galaxy mag 11.0 3.1° Eridanus

NGC 1725

Hard+

Elliptical galaxy

Galaxy mag 13.0 3.3° Eridanus

66 Eri

Medium

Variable star, range 5.1–5.6

Variable Star mag 5.12 3.7° Eridanus

NGC 1784

Hard+

Bright spiral galaxy

Galaxy mag 11.8 4.3° Lepus

NGC 1788

Medium+

Reflection nebula around a bright star

Reflection Nebula mag 5.80 4.9° Orion

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