CWNU 1973

0.18 UTI

0.25

C_N

0.07

C_dens

0.75

C_C3

0.06

C_lit

0.76

C_dup

N_m (P>50%) 25

Core radius and density 2.5 [pc], 0.4 [pc^-2]

C3 classification AB

C_N 0.25 Poorly populated
C_dens 0.07 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.76 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 1973 is a poorly populated, very loose object of high 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.

Note: This is very likely a unique object, which shares a 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=0.76) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Data

🔍 Search references for CWNU 1973 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–	103.53	-7.754	0.207	-0.763	1.362	–
Hunt & Reffert	2024	103.516	-7.754	0.196	-0.717	1.33	–
Cavallo et al.	2024	103.57	-7.666	0.195	–	–	–
Hunt & Reffert	2023	103.516	-7.754	0.196	-0.717	1.33	–
He et al.	2023	103.514	-7.755	0.206	-0.768	1.369	–

💡 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–	4.455	1.895	1.87	186	0.090	172	–	–
Hunt & Reffert	2024	4.46	1.89	1.87	186	–	172⁽¹⁾	–	–
Cavallo et al.	2024	3.87	1.90	–	209	0.090	–	–	–
Hunt & Reffert	2023	4.45	1.89	1.87	186	–	–	–	–
He et al.	2023	6.76	2.35	–	7	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Teutsch 202	24.0	103.62	-7.86	0.17	-0.76	1.39	88.38	0.05

💡 Note: The % column shows the percentage of members that CWNU 1973 shares with each listed object.

Visualization

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