CWNU 218

0.40 UTI

0.0

C_N

0.63

C_dens

0.75

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 24

Stellar density (N₅₀/rad) 3.2 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.63 Moderately dense
C_C3 0.75 High 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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CWNU 218 is a sparse, moderately dense object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a metal-rich, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Low extinction Metal-rich Intermediate age

Liu et al. (2025)
Classified as primordial binary cluster 63 along with FoF_2210.

Palma et al. (2025)
Classified as optical pair P252, along with FoF_2210.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for CWNU 218 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–	244.918	-55.615	0.717	0.002	-1.487	-15.83
Hunt & Reffert	2024	244.901	-55.617	0.719	-0.007	-1.497	-20.265
Cavallo et al.	2024	244.962	-55.614	0.714	–	–	–
Hunt & Reffert	2023	244.901	-55.617	0.719	-0.007	-1.497	-20.265
He et al.	2022	244.964	-55.625	0.68	-0.04	-1.46	-8.3

💡 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–	1.555	0.78	0.7	217	0.632	274	–	–
Liu et al.	2025	2.73	0.49	–	126	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	274⁽¹⁾	–	–
Cavallo et al.	2024	1.37	0.72	–	468	0.460	–	–	–
Hunt & Reffert	2023	1.32	0.84	0.70	308	–	–	–	–
He et al.	2022	1.74	1.20	–	126	0.805	–	–	–

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

Visualization

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