NGC 6856

0.20 UTI

0.0

C_N

0.02

C_dens

0.38

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 17

Stellar density (N₅₀/rad) 0.1 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.38 Low quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 6856 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 poorly studied in the literature, with no articles listed in the last 9 years.

(*): The parallax distance estimate (~5.96 kpc) differs significantly from the median photometric distance (~2.17 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

Data

🔍 Search references for NGC 6856 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–	299.844	56.131	0.168	-2.51	-3.056	-125.239
Loktin & Popova	2017	299.82	56.13	–	-2.959	-1.478	–
Dias et al.	2014	299.821	56.13	–	-2.26	-5.53	–
Bukowiecki et al.	2011	299.825	56.133	–	–	–	–
Dias et al.	2002	299.821	56.13	–	-2.85	-6.54	–

💡 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–	2.17	0.51	–	1096	–	74	–	–
Loktin & Popova	2017	4.22	0.51	–	1096	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	74	–	–
Bukowiecki et al.	2011	2.17⁽¹⁾	2.33	–	112	–	–	–	–
Dias et al.	2002	1.70	0.50	–	1820	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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