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IC 2105 — Diffuse Nebula in Dorado

Diffuse Nebula Modest (16/100)
Magnitude 11.3m DiffuseNebula Dorado (Dor) Visible
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1Properties

Magnitude 11.30
Angular Size 0.7′ × 0.6′
Position Angle 170°
PN , stellar

Position & Identifiers

RA 04h 49m 24.0s
Dec -69° 12' 00.0"
Constellation Dorado (Dor)
Catalog IC 2105

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard V. hard+ V. hard
150mm Newt. Hard+ Hard+ Hard
C8 203mm Medium Hard+ Hard+
Easy Medium Hard Very hard Impossible

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

With O-III filter

Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Hard+ Hard Hard
150mm Newt. Medium Medium Hard+
C8 203mm Medium+ Medium+ Medium
Stretch on Seestar S50

3Visibility

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Best season Oct – Dec (peak: Nov)

4 Filter Response Guide

5 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

IC 2105 · 0.7′×0.6′ · N up, E left

Explore

6 Surface Brightness

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 1698
Hard+
Compact globular cluster
Globular Cluster mag 12.07 0.1° Dorado
NGC 1695
Hard+
Open cluster
Open Cluster mag 12.16 0.2° Dorado
NGC 1714
Hard+
Diffuse nebula
Diffuse Nebula mag 11.61 2.3° Dorado
NGC 1763
Medium+
Emission nebula — try an OIII filter
Emission Nebula mag 9.40 2.9° Dorado
IC 2128
Hard+
Diffuse nebula
Diffuse Nebula mag 11.10 3.2° Dorado
NGC 2069
Medium+
Diffuse nebula
Diffuse Nebula mag 10.10 4.4° Dorado
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