CWNU 252

0.40 UTI

0.47

C_N

0.52

C_dens

0.75

C_C3

0.13

C_lit

1.0

C_dup

N_m (P>50%) 47

Core radius and density 1.0 [pc], 2.6 [pc^-2]

C3 classification AB

C_N 0.47 Poorly populated
C_dens 0.52 Moderately dense
C_C3 0.75 High quality
C_lit 0.13 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 252 is a poorly populated, moderately dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption, age, and metallicity parameters (see Parameters). It is rarely studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 64 along with Harvard_5.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P203, along with Harvard_5.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for CWNU 252 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–	185.366	-61.064	0.78	-7.068	-0.671	-20.393
Hu & Soubiran	2025	185.484	-61.05	–	–	–	–
Hunt & Reffert	2024	185.398	-61.072	0.777	-7.055	-0.658	-16.109
Cavallo et al.	2024	185.484	-61.05	0.779	–	–	–
Hunt & Reffert	2023	185.398	-61.072	0.777	-7.055	-0.658	-16.109
He et al.	2022	185.376	-61.085	0.76	-7.05	-0.72	-3.4

💡 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–	1.23	0.72	0.83	261	0.270	123	–	–
Liu et al.	2025	1.65	0.27	–	162	–	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.250⁽⁵⁾	–	–	–
Hunt & Reffert	2024	1.23	0.73	0.83	261	–	123⁽¹⁾	–	–
Cavallo et al.	2024	1.19	0.42	–	501	0.270	–	–	–
Hunt & Reffert	2023	1.23	0.72	0.83	261	–	–	–	–
He et al.	2022	1.62	1.20	–	100	0.350	–	–	–

(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 14187	53.2	185.36	-61.07	0.78	-7.04	-0.61	-12.93	0.0

💡 Note: The % column shows the percentage of members that CWNU 252 shares with each listed object.

Visualization

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