CWNU 1638

0.28 UTI

0.3

C_N

0.21

C_dens

0.75

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 30

Core radius and density 1.6 [pc], 1.1 [pc^-2]

C3 classification AB

C_N 0.3 Poorly populated
C_dens 0.21 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 1638 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 (see Parameters). It was recently reported in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for CWNU 1638 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–	233.482	-59.628	0.495	-4.258	-4.429	-36.93
Hunt & Reffert	2024	233.45	-59.681	0.488	-4.267	-4.44	-36.88
Cavallo et al.	2024	233.443	-59.637	0.485	–	–	–
Hunt & Reffert	2023	233.45	-59.681	0.488	-4.267	-4.44	-36.88
He et al.	2023	233.48	-59.641	0.493	-4.253	-4.434	-36.35

💡 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–	1.95	1.5	0.82	286	0.240	94	–	–
Hunt & Reffert	2024	1.95	1.50	0.82	218	–	94⁽¹⁾	–	–
Cavallo et al.	2024	2.09	1.49	–	355	0.240	–	–	–
Hunt & Reffert	2023	1.95	1.50	0.82	218	–	–	–	–
He et al.	2023	1.91	1.55	–	501	–	–	–	–

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

Visualization

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