CWNU 2907

0.11 UTI

0.0

C_N

0.06

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 2.3 [pc], 0.3 [pc^-2]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.06 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 2907 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, below 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 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 Moderate extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P366, along with UBC_482.

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 2907 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–	129.934	-45.532	0.467	-5.812	4.585	–
Hunt & Reffert	2024	129.948	-45.521	0.46	-5.803	4.607	–
Cavallo et al.	2024	129.892	-45.555	0.46	–	–	–
Hunt & Reffert	2023	129.948	-45.521	0.46	-5.803	4.607	–
He et al.	2023	129.942	-45.546	0.451	-5.812	4.589	–

💡 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–	2.105	1.51	0.54	84	-0.300	117	–	–
Hunt & Reffert	2024	2.02	1.51	0.54	148	–	117⁽¹⁾	–	–
Cavallo et al.	2024	2.22	2.15	–	19	-0.300	–	–	–
Hunt & Reffert	2023	2.02	1.51	0.54	148	–	–	–	–
He et al.	2023	2.19	1.10	–	11	–	–	–	–

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

Visualization

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