CWNU 1266

0.21 UTI

0.25

C_N

0.19

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 1.6 [pc], 1.0 [pc^-2]

C3 classification BB

C_N 0.25 Poorly populated
C_dens 0.19 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

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CWNU 1266 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, 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 Low mass Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P298, along with UBC_189.

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 1266 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–	35.987	62.414	0.991	-0.031	-1.781	-27.974
Hunt & Reffert	2024	35.941	62.402	0.978	-0.071	-1.776	-28.291
Cavallo et al.	2024	36.069	62.581	0.983	–	–	–
Hunt & Reffert	2023	35.941	62.402	0.978	-0.071	-1.776	-28.291
He et al.	2022	36.255	62.365	1.009	-0.017	-1.781	–

💡 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–	0.97	1.49	0.48	38	-0.330	48	–	–
Hunt & Reffert	2024	0.97	1.48	0.48	38	–	48⁽¹⁾	–	–
Cavallo et al.	2024	1.00	1.58	–	35	-0.330	–	–	–
Hunt & Reffert	2023	0.97	1.48	0.48	38	–	–	–	–
He et al.	2022	–	1.50	–	89	–	–	–	–

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

Visualization

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