NGC 2539

Scientific overview

NGC 2539 is an open cluster in the constellation Puppis. It shines at apparent magnitude 6.5 and spans about 12.3 arcminutes of sky.

Difficulty

Binoculars

Recommended equipment

10×50 binoculars or any small telescope

Best observed

Spring (evening sky)

Best hemisphere

Both (equatorial)

Guidance follows standard observing practice, derived from the object's real magnitude and position. A dark, moonless sky always helps.

RA / Dec

8.1769h / -12.8207°

Hemisphere

Both

Season

Spring

Object	Type	Mag	Size (′)
M 47M 47 · NGC 2422	Open cluster	4.4	19.8
NGC 2477C 71 · NGC 2477	Open cluster	5.8	18.6
M 46M 46 · NGC 2437	Open cluster	6.1	21
M 93M 93 · NGC 2447	Open cluster	6.2	15
NGC 2546NGC 2546	Open cluster	6.3	16.5
NGC 2520NGC 2520	Open cluster	6.5	9.3
NGC 2423NGC 2423	Open cluster	6.7	11.7
NGC 2439NGC 2439	Open cluster	6.9	8.7

Facts on this topic will be cited from these primary and reference sources.

OpenNGCOpenNGC (M. Verga) — NGC/IC, Messier, and Caldwell catalogue data
Openly-licensed deep-sky catalogue: object types, positions, magnitudes, sizes, morphology, and cross-identifiers.

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