CWNU 1355

0.24 UTI

0.34

C_N

0.16

C_dens

0.5

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 34

Core radius and density 0.6 [pc], 0.8 [pc^-2]

C3 classification BB

C_N 0.34 Poorly populated
C_dens 0.16 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.1 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 1355 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It was recently reported 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 Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for CWNU 1355 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–	96.065	21.074	0.606	-0.809	-4.071	–
Zhang et al.	2024	96.059	21.098	–	–	–	–
Hunt & Reffert	2024	96.059	21.098	0.607	-0.778	-4.074	–
Cavallo et al.	2024	96.054	21.057	0.612	–	–	–
Hunt & Reffert	2023	96.059	21.098	0.607	-0.778	-4.074	–
He et al.	2023	96.088	21.057	0.612	-0.811	-4.056	–

💡 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–	1.59	0.89	0.85	299	0.121	174	–	–
Zhang et al.	2024	–	–	–	–	-0.098⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.52	0.81	0.85	299	–	174⁽¹⁾	–	–
Cavallo et al.	2024	1.99	0.97	–	324	0.340	–	–	–
Hunt & Reffert	2023	1.52	0.81	0.85	299	–	–	–	–
He et al.	2023	1.66	1.05	–	40	–	–	–	–

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

Visualization

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