CWNU 1851

0.24 UTI

0.0

C_N

0.33

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.7 [N/pc²]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.33 Loose
C_C3 0.38 Low quality
C_lit 0.25 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 1851 is a sparse, loose object of low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, intermediate-age cluster (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 Metal-poor Intermediate age

Palma et al. (2025)
Part of multiple system G44, along with HSC_2849, ESO_332-13 and NGC_6231.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for CWNU 1851 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–	254.419	-41.457	0.604	-0.52	-0.051	-44.68
Hunt & Reffert	2024	254.405	-41.466	0.616	-0.508	-0.075	-44.678
Cavallo et al.	2024	254.457	-41.429	0.611	–	–	–
Hunt & Reffert	2023	254.405	-41.466	0.616	-0.508	-0.075	-44.678
He et al.	2023	254.424	-41.458	0.608	-0.498	-0.042	–

💡 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–	1.57	1.92	1.03	102	-0.800	121	–	–
Hunt & Reffert	2024	–	–	–	–	–	121⁽¹⁾	–	–
Cavallo et al.	2024	1.58	1.92	–	191	-0.800	–	–	–
Hunt & Reffert	2023	1.57	1.76	1.03	102	–	–	–	–
He et al.	2023	1.55	1.95	–	89	–	–	–	–

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

Visualization

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