CWNU 2621

0.19 UTI

0.0

C_N

0.21

C_dens

0.75

C_C3

0.06

C_lit

0.88

C_dup

N_m (P>50%) 23

Core radius and density 1.3 [pc], 1.1 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.21 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.88 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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CWNU 2621 is a sparse, very loose object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by very high extinction. It is catalogued as a massive, 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=0.88) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Very high extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.17 (50th percentile).

Data

🔍 Search references for CWNU 2621 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–	259.774	-42.356	0.262	-0.972	-3.177	-78.012
Hunt & Reffert	2024	259.784	-42.356	0.257	-0.945	-3.167	-60.965
Cavallo et al.	2024	259.758	-42.36	0.255	–	–	–
Hunt & Reffert	2023	259.784	-42.356	0.257	-0.945	-3.167	-60.965
He et al.	2023	259.772	-42.362	0.272	-0.927	-3.178	-69.45

💡 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–	3.3	5.135	2.63	142	0.470	1518	–	–
Hunt & Reffert	2024	3.30	5.17	2.63	101	–	1518⁽¹⁾	–	–
Cavallo et al.	2024	3.56	4.32	–	182	0.470	–	–	–
Hunt & Reffert	2023	3.30	5.17	2.63	101	–	–	–	–
He et al.	2023	3.02	5.10	–	562	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
VVVX CL056	12.0	259.49	-42.23	0.27	-0.99	-3.15	-52.87	0.05

💡 Note: The % column shows the percentage of members that CWNU 2621 shares with each listed object.

Visualization

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