CWNU 1535

0.14 UTI

0.0

C_N

0.22

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 24

Core radius and density 1.4 [pc], 1.1 [pc^-2]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.22 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 1535 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high extinction. It is catalogued as a metal-rich, young cluster, but with a large variance across recent sources for the age parameter (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 High extinction Metal-rich Young

Palma et al. (2025)
Classified as optical pair P314, along with CWNU_2622.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.40 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.40 (50th percentile).

Data

🔍 Search references for CWNU 1535 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–	258.994	-42.315	0.439	-1.163	-1.609	-13.578
Hunt & Reffert	2024	258.995	-42.29	0.431	-1.14	-1.614	-22.648
Cavallo et al.	2024	259.004	-42.275	0.437	–	–	–
Hunt & Reffert	2023	258.995	-42.29	0.431	-1.14	-1.614	-22.648
He et al.	2023	258.979	-42.291	0.447	-1.144	-1.598	–

💡 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–	2.1	3.325	2.21	24	0.960	313	–	–
Hunt & Reffert	2024	2.10	3.27	2.21	24	–	313⁽¹⁾	–	–
Cavallo et al.	2024	2.45	3.38	–	110	0.960	–	–	–
Hunt & Reffert	2023	2.10	3.27	2.21	24	–	–	–	–
He et al.	2023	2.00	4.05	–	9	–	–	–	–

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

Visualization

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