CWNU 2909

0.20 UTI

0.0

C_N

0.27

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.4 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.27 Loose
C_C3 0.75 High quality
C_lit 0.0 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 2909 is a sparse, loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age 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.

Distant Moderate extinction Intermediate age

Data

🔍 Search references for CWNU 2909 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–	115.135	-20.783	0.275	-2.149	2.408	–
Hunt & Reffert	2024	115.13	-20.779	0.282	-2.151	2.41	–
Hunt & Reffert	2023	115.13	-20.779	0.282	-2.151	2.41	–
He et al.	2023	115.132	-20.779	0.28	-2.143	2.408	–

💡 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–	3.5	1.45	0.33	120	–	174	–	–
Hunt & Reffert	2024	–	–	–	–	–	174⁽¹⁾	–	–
Hunt & Reffert	2023	3.20	1.15	0.33	216	–	–	–	–
He et al.	2023	3.80	1.75	–	25	–	–	–	–

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

Visualization

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