NGC 6839

(MWSC 3203)

0.14 UTI

0.0

C_N

0.03

C_dens

0.38

C_C3

0.16

C_lit

1.0

C_dup

N_m (P>50%) 15

Core radius and density 3.5 [pc], 0.1 [pc^-2]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.38 Low quality
C_lit 0.16 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 6839 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~4.82 kpc) differs significantly from the median photometric distance (~1.41 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. (2022)
Likely not a real open cluster.

Data

🔍 Search references for NGC 6839 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	99999–	298.592	17.891	0.207	-4.067	-7.423	10.813
Bica et al.	2019	298.587	17.881	–	–	–	–
Dias et al.	2018	–	–	–	-4.6	-4.9	–
Loktin & Popova	2017	298.635	17.87	–	0.111	-5.486	–
Sampedro et al.	2017	298.637	17.938	–	-0.82	-3.83	–
Tadross	2014	298.637	17.938	–	–	–	–
Dias et al.	2014	298.637	17.938	–	-0.85	-3.28	–
Dias et al.	2002	298.637	17.938	–	-0.85	-3.28	–

💡 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–	1.41	0.91	–	1413	–	–	–	–
Loktin & Popova	2017	1.62	0.36	–	2399	–	–	–	–
Tadross	2014	1.41	0.91	–	1400	–	–	–	–
Dias et al.	2002	1.41	0.91	–	1413	–	–	–	–

Visualization

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