Menu

NGC 1866 — Open Cluster in Dorado

Open Cluster Good (45/100)
Magnitude 9.8m OpenCluster Dorado (Dor) Visible
Star Map
+ List + Plan Star Hop

Observe

1Properties

Magnitude 9.8
Angular Size 5.5′
vB, L, R, vgmbM, r

Position & Identifiers

RA 05h 13m 39.1s
Dec -65° 27' 56.2"
Constellation Dorado (Dor)
Catalog NGC 1866

2How easy to spot?

Sign in and configure your equipment and default location to see a personalized row.
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

Easy on Seestar S50

3Visibility

Set a location in User Settings to see visibility data.

Best season Nov – Jan (peak: Dec)

4 Eyepiece View

Log in to set your own equipment
125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 1866 · 5.5′ diameter

5 Best Magnification

Explore

6 Classification Decoder

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 1859
Hard+
Open cluster
Open Cluster mag 12.26 0.3° Dorado
NGC 1892
Hard+
Bright spiral galaxy
Galaxy mag 12.29 0.6° Dorado
NGC 1882
Hard+
Open cluster
Open Cluster mag 12.33 0.7° Dorado
NGC 1831
Medium+
Open cluster
Open Cluster mag 11.0 0.9° Dorado
NGC 1902
Medium
Open cluster
Open Cluster mag 11.77 1.3° Dorado
NGC 1868
Medium
Compact globular cluster
Globular Cluster mag 11.57 1.5° Dorado
NGC 1763
Medium+
Emission nebula — try an OIII filter
Emission Nebula mag 9.40 2.0° Dorado
Show on Map

Explore Nightbase

Related knowledge, tools, and stories — no observation planning required.

Dorado
Mythology, bright stars, and deep-sky highlights.
Constellation
The Life of Stars
From birth in a nebula to spectacular death — how stars are born, shine, swell, and die, and how to read the clues in their starlight.
Article
Venus
Phases, transits, and the brightest planet in the sky.
Deep dive
}