CWNU 2661

0.34 UTI

0.75

C_N

0.23

C_dens

0.5

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 107

Core radius and density 3.4 [pc], 1.2 [pc^-2]

C3 classification BB

C_N 0.75 Rich
C_dens 0.23 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.1 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 2661 is a rich, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above 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.

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

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.60 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.60 (50th percentile).

Data

🔍 Search references for CWNU 2661 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–	122.509	-29.85	0.205	-2.789	2.63	58.825
Hu & Soubiran	2025	122.493	-29.849	–	–	–	–
Hunt & Reffert	2024	122.503	-29.854	0.214	-2.785	2.626	62.673
Cavallo et al.	2024	122.493	-29.849	0.212	–	–	–
Hunt & Reffert	2023	122.503	-29.854	0.214	-2.785	2.626	62.673
He et al.	2023	122.504	-29.837	0.213	-2.792	2.614	59.79

💡 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–	4.31	1.305	2.03	862	-0.275	866	–	–
Hu & Soubiran	2025	–	–	–	–	-0.260⁽⁵⁾	–	–	–
Hunt & Reffert	2024	4.31	1.18	2.03	862	–	866⁽¹⁾	–	–
Cavallo et al.	2024	3.55	1.43	–	1122	-0.290	–	–	–
Hunt & Reffert	2023	4.31	1.18	2.03	861	–	–	–	–
He et al.	2023	5.13	1.80	–	501	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 2701	62.6	122.51	-29.85	0.2	-2.77	2.6	59.57	0.04

💡 Note: The % column shows the percentage of members that CWNU 2661 shares with each listed object.

Visualization

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