NGC 6664

Scientific overview

NGC 6664 is an open cluster in the constellation Scutum. It shines at apparent magnitude 7.8 and spans about 6 arcminutes of sky.

Difficulty

Small telescope

Recommended equipment

≈ 80–100 mm telescope

Best observed

Summer (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

18.6093h / -8.2207°

Hemisphere

Both

Season

Summer

Object	Type	Mag	Size (′)
Amas de l'Ecu de SobieskiM 11 · NGC 6705	Open cluster	5.8	9
IC 1287	Reflection nebula	6.1	20
NGC 6712NGC 6712	Globular cluster	8.69	5.7
M 26M 26 · NGC 6694	Open cluster	8.87	6
NGC 6649NGC 6649	Open cluster	8.9	5.58
NGC 6625NGC 6625	Open cluster	9	6
NGC 6704NGC 6704	Open cluster	9.2	3.3
NGC 6683NGC 6683	Open cluster	9.4	3

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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