Menu

NGC 4815 — Open Cluster in Musca

Open Cluster Good (42/100)
Magnitude 8.6m OpenCluster Musca (Mus) Visible
Star Map
+ List + Plan Star Hop

Observe

1Properties

Magnitude 8.6
Angular Size 3.9′
Cl, pL, pRi, iF, st 10...18

Position & Identifiers

RA 12h 57m 58.4s
Dec -64° 57' 42.5"
Constellation Musca (Mus)
Catalog NGC 4815

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. Easy Easy Easy
150mm Newt. Easy Easy Easy
C8 203mm Easy Easy Easy
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 Feb – Apr (peak: Mar)

4 Eyepiece View

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

NGC 4815 · 3.9′ 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.

Theta Mus
Easy
Easy double, sep 5.2″
Double Star mag 5.51 1.1° Musca
Coalsack Nebula
Easy
Dark nebula — shows as a void against the Milky Way
Dark Nebula mag 12.0 2.3° Crux
C98
NGC 4609
Easy
Rich open cluster
Open Cluster mag 6.9 2.6° Crux
NGC 4463
Easy
Open cluster
Open Cluster mag 7.2 3.0° Musca
NGC 5189
Hard+
Planetary nebula — try an OIII filter
Planetary Nebula mag 10.0 3.8° Musca
Collinder 261
Easy
Open cluster
Open Cluster mag 9.0 3.9° Musca
Jewel Box
NGC 4755
Easy
Rich open cluster
Open Cluster mag 4.2 4.6° Crux
Show on Map

Explore Nightbase

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

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
Musca
Mythology, bright stars, and deep-sky highlights.
Constellation
Jupiter
The Great Red Spot, cloud belts, and the Galilean moons.
Deep dive
}