CWNU 1242

0.26 UTI

0.0

C_N

0.17

C_dens

0.75

C_C3

0.19

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 2.4 [pc], 0.9 [pc^-2]

C3 classification BA

C_N 0.0 Sparse
C_dens 0.17 Very loose
C_C3 0.75 High quality
C_lit 0.19 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 1242 is a sparse, very loose object of high C3 quality. Its parallax locates it at a very close distance, below 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 absorption 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.

Very close Moderate extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.13 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.13 (50th percentile).

Data

🔍 Search references for CWNU 1242 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–	65.628	15.238	3.389	3.111	-3.526	26.382
Yang et al.	2025	65.617	15.251	–	–	–	–
Zhang et al.	2024	65.617	15.251	–	–	–	–
Cavallo et al.	2024	65.801	15.293	3.437	–	–	–
Hunt & Reffert	2023	65.617	15.251	3.43	3.129	-3.454	21.224
He et al.	2022	65.716	15.216	3.452	3.133	-3.581	–

💡 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–	0.29	1.47	1.11	7	-0.060	–	–	–
Yang et al.	2025	–	–	–	7	-0.060⁽³⁾	–	–	–
Zhang et al.	2024	–	–	–	–	-0.082⁽¹⁾	–	–	–
Cavallo et al.	2024	0.29	2.38	–	11	-0.020	–	–	–
Hunt & Reffert	2023	0.29	1.47	1.11	7	–	–	–	–
He et al.	2022	–	0.05	–	4	–	–	–	–

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

Visualization

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