CWNU 2211

0.21 UTI

0.25

C_N

0.15

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 2.3 [pc], 0.7 [pc^-2]

C3 classification BB

C_N 0.25 Poorly populated
C_dens 0.15 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 2211 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below 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

Palma et al. (2025)
Part of multiple system G133, along with UBC_1376, HSC_1847 and HSC_1848.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.93 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.93 (50th percentile).

Data

🔍 Search references for CWNU 2211 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–	108.922	-19.561	0.332	-2.587	1.518	–
Hunt & Reffert	2024	108.93	-19.576	0.325	-2.585	1.494	–
Cavallo et al.	2024	108.936	-19.573	0.328	–	–	–
Hunt & Reffert	2023	108.93	-19.576	0.325	-2.585	1.494	–
He et al.	2023	108.919	-19.565	0.348	-2.587	1.525	–

💡 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–	2.835	1.61	1.98	282	0.270	338	–	–
Hunt & Reffert	2024	2.79	1.61	1.98	283	–	338⁽¹⁾	–	–
Cavallo et al.	2024	2.88	1.56	–	490	0.270	–	–	–
Hunt & Reffert	2023	2.79	1.61	1.98	282	–	–	–	–
He et al.	2023	2.88	2.00	–	22	–	–	–	–

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

Visualization

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