CWNU 42

0.20 UTI

0.0

C_N

0.36

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 1.5 [pc], 1.8 [pc^-2]

C3 classification BB

C_N 0.0 Sparse
C_dens 0.36 Loose
C_C3 0.5 Intermediate 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 42 is a sparse, loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age 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 Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.95 (50th percentile).

Data

🔍 Search references for CWNU 42 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–	318.276	46.068	0.408	0.062	-1.674	–
Hunt & Reffert	2024	318.273	46.083	0.398	0.018	-1.699	-11.411
Cavallo et al.	2024	318.241	46.052	0.4	–	–	–
Hunt & Reffert	2023	318.273	46.083	0.398	0.018	-1.699	-11.411
He et al.	2022	318.251	46.07	0.41	0.06	-1.64	–

💡 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–	2.3	1.545	2.47	224	0.035	256	–	–
Hunt & Reffert	2024	2.30	1.44	2.47	270	–	256⁽¹⁾	–	–
Cavallo et al.	2024	2.40	1.66	–	178	-0.050	–	–	–
Hunt & Reffert	2023	2.30	1.44	2.47	270	–	–	–	–
He et al.	2022	2.19	1.65	–	32	0.119	–	–	–

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

Visualization

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