CWNU 1155

0.13 UTI

0.0

C_N

0.15

C_dens

0.25

C_C3

0.12

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 2.0 [pc], 0.8 [pc^-2]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.15 Very loose
C_C3 0.25 Low quality
C_lit 0.12 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 1155 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 a metal-rich, 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.

Close Moderate extinction Metal-rich Young

Palma et al. (2025)
Part of multiple system G34, along with UPK_220 and PTB_9.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.71 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.71 (50th percentile).

Data

🔍 Search references for CWNU 1155 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–	355.77	66.944	0.996	-2.337	0.059	-14.158
Hunt & Reffert	2024	355.856	66.941	1.009	-2.307	0.12	-15.61
Cavallo et al.	2024	355.84	66.924	1.007	–	–	–
Hunt & Reffert	2023	355.856	66.941	1.009	-2.307	0.12	-15.61
He et al.	2022	355.882	66.921	1.004	-2.331	0.075	–

💡 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–	0.96	2.98	1.99	49	0.750	183	–	–
Hunt & Reffert	2024	0.96	2.98	1.99	57	–	183⁽¹⁾	–	–
Cavallo et al.	2024	1.31	2.75	–	41	0.750	–	–	–
Hunt & Reffert	2023	0.96	2.98	1.99	57	–	–	–	–
He et al.	2022	–	3.10	–	40	–	–	–	–

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

Visualization

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