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NGC 1878 — Open Cluster in Mensa

Open Cluster Fair (29/100)
Magnitude 12.9m OpenCluster Mensa (Men) Visible
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1Properties

Magnitude 12.94
Angular Size 1.1′ × 1.0′
Position Angle 50°
vF, lE, gvlbM, R

Position & Identifiers

RA 05h 12m 50.9s
Dec -70° 28' 18.1"
Constellation Mensa (Men)
Catalog NGC 1878

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. V. hard V. hard Imp.
150mm Newt. Hard Hard V. hard+
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 Nov – Jan (peak: Dec)

4 Eyepiece View

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125x TFOV: 0.4° Lim. mag: 13.6
N E

NGC 1878 · 1.1′ 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 1845
Easy
Open cluster
Open Cluster mag 10.20 0.6° Mensa
NGC 1823
Hard+
Open cluster
Open Cluster mag 12.09 0.8° Mensa
NGC 1815
Hard+
Open cluster
Open Cluster mag 12.41 0.9° Mensa
NGC 1898
Medium+
Compact globular cluster
Globular Cluster mag 11.0 0.9° Dorado
NGC 1939
Medium
Open cluster
Open Cluster mag 11.83 0.9° Mensa
NGC 2018
Medium
Emission nebula — try an OIII filter
Emission Nebula mag 10.89 1.6° Mensa
IC 2105
Hard+
Diffuse nebula
Diffuse Nebula mag 11.30 2.4° Dorado
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