CWNU 1900

0.22 UTI

0.0

C_N

0.21

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 23

Stellar density (N₅₀/rad) 1.1 [N/pc²]

C3 classification CB

C_N 0.0 Sparse
C_dens 0.21 Very loose
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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CWNU 1900 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, 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.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for CWNU 1900 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–	113.897	-26.041	0.313	-1.104	1.085	–
Hunt & Reffert	2024	113.849	-26.032	0.309	-1.106	1.099	–
Cavallo et al.	2024	113.88	-26.018	0.315	–	–	–
Hunt & Reffert	2023	113.849	-26.032	0.309	-1.106	1.099	–
He et al.	2023	113.904	-25.995	0.313	-1.103	1.072	56.59

💡 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–	2.83	1.42	1.4	325	0.180	171	–	–
Hunt & Reffert	2024	–	–	–	–	–	171⁽¹⁾	–	–
Cavallo et al.	2024	2.83	1.42	–	151	0.180	–	–	–
Hunt & Reffert	2023	2.73	1.25	1.40	325	–	–	–	–
He et al.	2023	2.95	1.45	–	631	–	–	–	–

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

Visualization

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