CWNU 20

0.18 UTI

0.0

C_N

0.15

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 23

Radius (P>50% members) 28.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.15 Very loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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CWNU 20 is a sparse, very loose object of high C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a metal-poor, very young cluster (see Parameters). It is rarely studied in the literature.

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

⚠️ 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 Low extinction Metal-poor Very young

Data

🔍 Search references for CWNU 20 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	–	99.813	-31.608	1.511	-2.994	4.441	22.645
He et al.	2022	99.848	-31.521	1.51	-2.99	4.43	24.1

💡 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]	Bfr	BSS
He et al.	2022	0.93	0.30	–	4	-0.642	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HSC 1920	76.0	99.53	-31.67	1.51	-2.97	4.45	36.88	0.03

💡 Note: The % column shows the percentage of members that CWNU 20 shares with each listed object.

Visualization

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