CWNU 260

0.20 UTI

0.32

C_N

0.07

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 32

Core radius and density 2.9 [pc], 0.4 [pc^-2]

C3 classification BB

C_N 0.32 Poorly populated
C_dens 0.07 Very 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

ℹ️

CWNU 260 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a small percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

⚠️ 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 Low extinction Low mass Near-solar metallicity Intermediate age

Palma et al. (2025)
Classified as genetic pair P197, along with CWNU_135.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Data

🔍 Search references for CWNU 260 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	117.471	-49.692	1.306	-4.712	7.787	16.724
Hunt & Reffert	2024	117.494	-49.718	1.263	-4.738	7.669	15.844
Cavallo et al.	2024	117.762	-49.712	1.276	–	–	–
Hunt & Reffert	2023	117.494	-49.718	1.263	-4.738	7.669	15.844
He et al.	2022	117.435	-49.658	1.3	-4.68	7.85	15.5

💡 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–	0.745	0.29	0.95	115	0.370	43	–	–
Hunt & Reffert	2024	0.73	0.23	0.95	115	–	43⁽¹⁾	–	–
Cavallo et al.	2024	0.76	0.35	–	166	0.320	–	–	–
Hunt & Reffert	2023	0.73	0.23	0.95	115	–	–	–	–
He et al.	2022	0.91	0.51	–	79	0.420	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 258	18.8	115.43	-50.08	1.38	-4.52	7.78	16.87	0.14

💡 Note: The % column shows the percentage of members that CWNU 260 shares with each listed object.

Visualization

ℹ️

1 2