CWNU 1678

0.24 UTI

0.32

C_N

0.24

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 32

Core radius and density 1.3 [pc], 1.2 [pc^-2]

C3 classification BB

C_N 0.32 Poorly populated
C_dens 0.24 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 1678 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

⚠️ 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 Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for CWNU 1678 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–	162.375	-56.461	0.462	-6.93	3.936	–
Hunt & Reffert	2024	162.403	-56.463	0.465	-6.864	3.96	-22.798
Cavallo et al.	2024	162.291	-56.485	0.465	–	–	–
Hunt & Reffert	2023	162.403	-56.463	0.465	-6.864	3.96	-22.798
He et al.	2023	162.373	-56.486	0.463	-6.93	3.915	–

💡 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–	2.0	1.305	0.59	109	-0.090	180	–	–
Hunt & Reffert	2024	2.00	1.16	0.59	106	–	180⁽¹⁾	–	–
Cavallo et al.	2024	1.91	1.46	–	112	-0.090	–	–	–
Hunt & Reffert	2023	2.00	1.16	0.59	106	–	–	–	–
He et al.	2023	2.00	1.45	–	355	–	–	–	–

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

Visualization

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