CWNU 389

0.05 UTI

0.0

C_N

0.06

C_dens

0.38

C_C3

0.0

C_lit

0.6

C_dup

N_m (P>50%) 24

Core radius and density 2.6 [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 0.0 Rarely studied
C_dup 0.6 Likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 389 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry, and a moderate percentage with at least one entry reported in the same catalogue. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.6) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Low extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for CWNU 389 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–	20.203	60.927	1.125	3.0	-1.701	-18.903
He et al.	2022	20.753	60.806	1.14	3.01	-1.69	–

💡 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–	1.05	0.95	–	251	0.398	–	–	–
He et al.	2022	1.05	0.95	–	251	0.398	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 378	40.0	19.01	60.83	1.15	2.94	-1.68	-14.02	0.02
Theia 200	40.0	18.88	60.76	1.16	2.95	-1.69	-15.76	0.18

💡 Note: The % column shows the percentage of members that CWNU 389 shares with each listed object.

Visualization

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