CWNU 2178

0.14 UTI

0.0

C_N

0.05

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 3.7 [pc], 0.3 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.05 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 2178 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, 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.

Distant Moderate extinction Metal-poor Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.23 (50th percentile), true positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.23 (50th percentile), true positive? (human-assigned).

Data

🔍 Search references for CWNU 2178 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–	101.775	4.699	0.185	-0.304	0.18	65.361
Hunt & Reffert	2024	101.777	4.704	0.19	-0.283	0.278	37.62
Cavallo et al.	2024	101.828	4.717	0.187	–	–	–
Hunt & Reffert	2023	101.777	4.704	0.19	-0.283	0.278	37.62
He et al.	2023	101.724	4.646	0.206	-0.306	0.156	–

💡 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–	4.7	1.73	2.48	134	-0.540	432	–	–
Hunt & Reffert	2024	4.70	1.58	2.48	134	–	432⁽¹⁾	–	–
Cavallo et al.	2024	3.31	1.88	–	316	-0.540	–	–	–
Hunt & Reffert	2023	4.70	1.58	2.48	134	–	–	–	–
He et al.	2023	6.03	2.25	–	8	–	–	–	–

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

Visualization

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