NGC 6659

(MWSC 2952)

0.07 UTI

0.0

C_N

0.11

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 24

Radius (P>50% members) 4.6 [arcmin]

C_N 0.0 Sparse
C_dens 0.11 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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NGC 6659 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well above the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~5.01 kpc) differs significantly from the median photometric distance (~1.97 kpc).

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Old

Dias et al. (2002)
Asterism (Archinal, B. A. & Hynes, S. J. 2003)

Data

🔍 Search references for NGC 6659 in: SciX Simbad

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Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	278.561	23.61	0.2	-2.239	-2.633	–
Just et al.	2023	278.53	23.597	–	–	–	–
Kharchenko et al.	2016	278.53	23.597	–	–	–	–
Kharchenko et al.	2013	278.535	23.599	–	0.47	-4.76	–

💡 Note: The UCC values are estimated from its identified members.

Reference	Year	Dist [kpc]	Av [mag]	DAv [mag]	Age [Myr]	[Fe/H] [dex]	Mass [Msun]	Bfr	BSS
Just et al.	2023	–	–	–	2692	–	920	–	–
Kharchenko et al.	2016	1.97	0.32	–	2692	–	–	–	–
Kharchenko et al.	2013	1.97	0.32	–	2692	–	–	–	–

Visualization

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