CWNU 1938

0.27 UTI

0.27

C_N

0.19

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 27

Core radius and density 1.8 [pc], 0.9 [pc^-2]

C3 classification AB

C_N 0.27 Poorly populated
C_dens 0.19 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

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

Overview

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CWNU 1938 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high 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.

Relatively close High extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.23 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.23 (50th percentile).

Data

🔍 Search references for CWNU 1938 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–	219.312	-60.254	0.342	-2.483	-1.296	-9.611
Hunt & Reffert	2024	219.299	-60.262	0.353	-2.494	-1.358	-9.595
Cavallo et al.	2024	219.337	-60.257	0.35	–	–	–
Hunt & Reffert	2023	219.299	-60.262	0.353	-2.494	-1.358	-9.595
He et al.	2023	219.323	-60.255	0.339	-2.477	-1.288	–

💡 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–	2.87	3.78	2.52	198	-0.410	487	–	–
Hunt & Reffert	2024	2.50	2.79	2.52	356	–	487⁽¹⁾	–	–
Cavallo et al.	2024	3.36	4.77	–	41	-0.410	–	–	–
Hunt & Reffert	2023	2.50	2.79	2.52	356	–	–	–	–
He et al.	2023	3.24	5.80	–	2	–	–	–	–

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

Visualization

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