NGC 6659

(MWSC 2952)

0.09 UTI

0.0

C_N

0.02

C_dens

0.25

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 5.0 [pc], 0.09 [pc^-2]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.25 Low quality
C_lit 0.1 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

ℹ️

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

Bica et al. (2019)
List of clusters and alike reported by B. Alessi. Web updates in DAML02, some were later removed (2003 to 2010).

Dias et al. (2002)
Asterism (Archinal, B. A. & Hynes, S. J. 2003); cat V3.5 (Jan 2016)

Data

🔍 Search references for NGC 6659 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	278.561	23.61	0.2	-2.239	-2.633	–
Just et al.	2023	278.53	23.597	–	–	–	–
Dib et al.	2018	278.535	23.599	–	–	–	–
Kharchenko et al.	2016	278.53	23.597	–	–	–	–
Tadross	2014	278.496	23.595	–	–	–	–
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]	B_frac	BSS
UCC	99999–	1.97	0.33	–	2692	–	920	–	–
Just et al.	2023	–	–	–	2692	–	920	–	–
Dib et al.	2018	1.97	–	–	2692	–	–	–	–
Kharchenko et al.	2016	1.97	0.33	–	2692	–	–	–	–
Tadross	2014	1.16	0.32	–	4000	–	–	–	–
Kharchenko et al.	2013	1.97	0.33	–	2692	–	–	–	–

Visualization

ℹ️