CWNU 1643

0.29 UTI

0.27

C_N

0.19

C_dens

0.75

C_C3

0.12

C_lit

1.0

C_dup

N_m (P>50%) 27

Core radius and density 2.5 [pc], 0.9 [pc^-2]

C3 classification BA

C_N 0.27 Poorly populated
C_dens 0.19 Very loose
C_C3 0.75 High quality
C_lit 0.12 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 1643 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, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Distant High extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.63 (50th percentile), false positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.63 (50th percentile), false positive? (human-assigned).

Data

🔍 Search references for CWNU 1643 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–	199.039	-63.422	0.203	-6.841	-0.97	-25.556
Hunt & Reffert	2024	199.05	-63.426	0.198	-6.85	-0.967	-6.063
Cavallo et al.	2024	199.041	-63.418	0.198	–	–	–
Hunt & Reffert	2023	199.05	-63.426	0.198	-6.85	-0.967	-6.063
He et al.	2023	199.051	-63.421	0.205	-6.851	-0.984	–

💡 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–	4.65	3.725	2.19	7	0.240	505	–	–
Hunt & Reffert	2024	4.65	3.72	2.19	7	–	505⁽¹⁾	–	–
Cavallo et al.	2024	3.65	3.25	–	138	0.240	–	–	–
Hunt & Reffert	2023	4.65	3.73	2.19	7	–	–	–	–
He et al.	2023	5.25	4.30	–	5	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Slizhevsky 250	3.7	199.43	-63.44	0.19	-6.73	-1.0	-25.02	0.1

💡 Note: The % column shows the percentage of members that CWNU 1643 shares with each listed object.

Visualization

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