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NGC 2259 — Open Cluster in Monoceros

Open Cluster Good (40/100)
Magnitude 11.0m OpenCluster Monoceros (Mon) Visible
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1Properties

Magnitude 11.0
Angular Size 6.0′
Cl, cRi, eC, iF, st eS

Position & Identifiers

RA 06h 38m 21.4s
Dec +10° 53' 01.0"
Constellation Monoceros (Mon)
Catalog NGC 2259

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

Easy 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 2259 · 6.0′ diameter

5 Best Magnification

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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.

15 Mon
Medium+
Easy double, sep 3.0″
Double Star mag 4.66 1.2° Monoceros
NGC 2247
Medium+
Reflection nebula around a bright star
Reflection Nebula mag 8.50 1.4° Monoceros
Collinder 95
Easy
Open cluster
Open Cluster mag 9.1 2.1° Monoceros
NGC 2251
Easy
Open cluster
Open Cluster mag 7.3 2.7° Monoceros
NGC 2254
Easy
Open cluster
Open Cluster mag 9.7 3.3° Monoceros
NGC 2236
Easy
Open cluster
Open Cluster mag 8.5 4.6° Monoceros
BL Ori
Medium
Semi-regular variable, range 5.9–6.6
Variable Star mag 6.24 5.0° Orion
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