CWNU 129

0.18 UTI

0.3

C_N

0.1

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 2.1 [pc], 0.5 [pc^-2]

C3 classification CB

C_N 0.3 Poorly populated
C_dens 0.1 Very 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 129 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (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 Young

Palma et al. (2025)
Classified as optical pair P300, along with CWNU_128.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for CWNU 129 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–	117.545	-34.44	0.721	-4.219	4.205	22.649
Hunt & Reffert	2024	117.59	-34.359	0.705	-4.208	4.23	22.876
Cavallo et al.	2024	117.55	-34.431	0.705	–	–	–
Hunt & Reffert	2023	117.59	-34.359	0.705	-4.208	4.23	22.876
He et al.	2022	117.468	-34.406	0.71	-4.24	4.21	–

💡 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–	1.37	1.495	1.28	33	-0.131	118	–	–
Hunt & Reffert	2024	1.37	1.33	1.28	34	–	118⁽¹⁾	–	–
Cavallo et al.	2024	1.40	1.66	–	23	-0.080	–	–	–
Hunt & Reffert	2023	1.37	1.33	1.28	34	–	–	–	–
He et al.	2022	1.29	1.71	–	32	-0.182	–	–	–

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

Visualization

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