CWNU 1980

0.21 UTI

0.0

C_N

0.35

C_dens

0.75

C_C3

0.0

C_lit

0.96

C_dup

C3 classification AB

Number of members (P>50%) 21

Radius (P>50% members) 6.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.35 Loose
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.96 Unique

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

Overview

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CWNU 1980 is a sparse, loose object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It was recently reported in the literature.

Note: This is a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.96) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Intermediate age

Data

🔍 Search references for CWNU 1980 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	–	280.713	-14.569	0.583	0.942	-0.381	-4.864
He et al.	2023	280.676	-14.501	0.587	0.929	-0.363	-32.99

💡 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.	2023	1.58	2.20	–	447	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 328	4.0	280.89	-14.43	0.6	0.8	-0.76	-3.55	0.07
UBC 1021	4.0	280.89	-14.43	0.6	0.81	-0.76	-3.55	0.61

💡 Note: The % column shows the percentage of members that CWNU 1980 shares with each listed object.

Visualization

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