CWNU 26

0.27 UTI

0.39

C_N

0.22

C_dens

0.5

C_C3

0.13

C_lit

1.0

C_dup

N_m (P>50%) 39

Core radius and density 1.9 [pc], 1.1 [pc^-2]

C3 classification BB

C_N 0.39 Poorly populated
C_dens 0.22 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.13 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 26 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is rarely studied in the literature.

Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 48 along with Theia_2249.

Palma et al. (2025)
Classified as optical pair P360, along with Theia_2249.

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 26 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–	93.853	13.808	0.441	-0.704	-1.044	–
Zhang et al.	2024	93.868	13.785	–	–	–	–
Hunt & Reffert	2024	93.868	13.785	0.432	-0.791	-1.046	–
Cavallo et al.	2024	93.842	13.728	0.432	–	–	–
Hunt & Reffert	2023	93.868	13.785	0.432	-0.791	-1.046	–
He et al.	2022	93.846	13.784	0.44	-0.56	-1.07	–

💡 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–	2.22	1.3	0.35	74	-0.183	111	–	–
Liu et al.	2025	3.45	0.44	–	47	–	–	–	–
Zhang et al.	2024	–	–	–	–	-0.183⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.22	1.30	0.35	74	–	111⁽¹⁾	–	–
Cavallo et al.	2024	1.98	1.52	–	28	-0.420	–	–	–
Hunt & Reffert	2023	2.22	1.30	0.35	74	–	–	–	–
He et al.	2022	1.78	1.27	–	158	-0.182	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HSC 1558	46.2	93.8	13.82	0.46	-0.5	-1.03	–	0.03

💡 Note: The % column shows the percentage of members that CWNU 26 shares with each listed object.

Visualization

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