CWNU 2131

0.08 UTI

0.0

C_N

0.08

C_dens

0.25

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 17

Core radius and density 2.1 [pc], 0.4 [pc^-2]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.08 Very loose
C_C3 0.25 Low quality
C_lit 0.03 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 2131 is a sparse, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as an 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 Intermediate age

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 2131 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–	0.403	70.546	0.628	0.449	0.603	-29.099
Hunt & Reffert	2024	0.357	70.508	0.641	0.405	0.58	–
Hunt & Reffert	2023	0.357	70.508	0.641	0.405	0.58	–
He et al.	2023	0.113	70.544	0.638	0.428	0.603	–

💡 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–	1.5	1.81	0.71	434	–	72	–	–
Hunt & Reffert	2024	1.50	1.81	0.71	433	–	72⁽¹⁾	–	–
Hunt & Reffert	2023	1.50	1.81	0.71	434	–	–	–	–
He et al.	2023	1.51	2.15	–	1000	–	–	–	–

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

Visualization

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