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NGC 2031 — Open Cluster in Mensa

Open Cluster Fair (29/100)
Magnitude 10.8m OpenCluster Mensa (Men) Visible
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1Properties

Magnitude 10.83
Angular Size 3.3′ × 2.8′
Position Angle 150°
glob. cl. , B, pL, R, gbM, rr

Position & Identifiers

RA 05h 33m 42.0s
Dec -70° 58' 60.0"
Constellation Mensa (Men)
Catalog NGC 2031

2How easy to spot?

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Telescope Bortle 3 Bortle 4 Bortle 5
80mm refr. Medium Hard+ Hard
150mm Newt. Easy Medium+ Medium
C8 203mm Easy Easy Medium+
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 2031 · 3.3′ 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 2051
Medium
Open cluster
Open Cluster mag 11.69 0.2° Mensa
NGC 2018
Medium
Emission nebula — try an OIII filter
Emission Nebula mag 10.89 0.2° Mensa
NGC 2010
Medium
Open cluster
Open Cluster mag 11.72 0.3° Mensa
NGC 2056
Medium
Open cluster
Open Cluster mag 11.77 0.4° Mensa
NGC 2038
Hard+
Open cluster
Open Cluster mag 11.92 0.4° Mensa
NGC 1987
Hard+
Compact globular cluster
Globular Cluster mag 12.0 0.6° Mensa
NGC 2069
Medium+
Diffuse nebula
Diffuse Nebula mag 10.10 2.1° Dorado
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