CWNU 331

0.22 UTI

0.32

C_N

0.25

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 32

Core radius and density 1.6 [pc], 1.3 [pc^-2]

C3 classification BC

C_N 0.32 Poorly populated
C_dens 0.25 Loose
C_C3 0.38 Low 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 331 is a poorly populated, 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 near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is rarely studied 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 Very young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.87 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.87 (50th percentile).

Data

🔍 Search references for CWNU 331 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–	124.435	-39.543	0.819	-5.05	4.187	12.125
Hunt & Reffert	2024	124.471	-39.521	0.826	-5.051	4.151	11.991
Cavallo et al.	2024	124.457	-39.591	0.825	–	–	–
Hunt & Reffert	2023	124.471	-39.521	0.826	-5.051	4.151	11.991
He et al.	2022	124.421	-39.567	0.83	-5.05	4.16	–

💡 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–	1.265	1.515	1.15	12	0.212	125	–	–
Hunt & Reffert	2024	1.14	1.35	1.15	15	–	125⁽¹⁾	–	–
Cavallo et al.	2024	1.39	1.68	–	8	0.050	–	–	–
Hunt & Reffert	2023	1.14	1.35	1.15	15	–	–	–	–
He et al.	2022	1.86	2.34	–	10	0.374	–	–	–

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

Visualization

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