CWNU 1639

0.37 UTI

0.0

C_N

0.98

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification CB

Number of members (P>50%) 23

Radius (P>50% members) 2.6 [arcmin]

C_N 0.0 Sparse
C_dens 0.98 Very dense
C_C3 0.38 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

CWNU 1639 is a sparse, very dense object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, intermediate-age cluster (see Parameters). It was recently reported in the literature.

Relatively close Moderate extinction Metal-rich Intermediate age

Cavallo et al. (2024): Gold sample.

Data

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	331.562	59.525	0.348	-1.791	-2.465	-52.44
Hunt & Reffert	2024	331.548	59.518	0.352	-1.786	-2.456	-52.382
Cavallo et al.	2024	331.579	59.518	0.352	–	–	–
Hunt & Reffert	2023	331.548	59.518	0.352	-1.786	-2.456	-52.382
He et al.	2023	331.58	59.512	0.359	-1.8	-2.464	-52.86

💡 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
Hunt & Reffert	2024	–	–	–	–	–	263*	–	–
Cavallo et al.	2024	2.92	2.21	–	240	0.620	–	–	–
Hunt & Reffert	2023	2.83	2.46	0.97	143	–	–	–	–
He et al.	2023	2.57	2.70	–	251	–	–	–	–

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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💡 Note: How are the galactocentric plots generated? See FAQ.