UBC 366

0.70 UTI

0.52

C_N

1.0

C_dens

0.75

C_C3

0.6

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 55

Radius (P>50% members) 5.3 [arcmin]

C_N 0.52 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.6 Moderately studied
C_dup 1.0 Unique

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

Overview

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UBC 366 is a moderately populated, very 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 metallicity parameter (see Parameters). It is moderately studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 366 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	–	299.853	37.213	0.53	-1.209	-2.241	-4.146
Li et al.	2025	299.841	37.204	0.529	-1.204	-2.233	–
Hu & Soubiran	2025	299.856	37.205	–	–	–	–
Almeida et al.	2025	299.849	37.211	–	–	–	–
Hunt & Reffert	2024	299.865	37.205	0.523	-1.197	-2.256	-20.727
Cavallo et al.	2024	299.857	37.205	0.526	–	–	–
Hunt & Reffert	2023	299.865	37.205	0.523	-1.197	-2.256	-20.727
Almeida et al.	2023	299.846	37.222	–	–	–	–
Dias et al.	2021	299.849	37.211	0.527	-1.199	-2.23	-1.879
Cantat-Gaudin et al.	2020	299.841	37.204	0.529	-1.204	-2.233	–
Castro-Ginard et al.	2020	299.835	37.21	0.527	-1.187	-2.234	–

💡 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
Li et al.	2025	1.59	0.83	–	548	-0.036	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.050*	–	–	–
Almeida et al.	2025	1.81	1.02	–	305	–	129	–	–
Hunt & Reffert	2024	–	–	–	–	–	273*	–	–
Cavallo et al.	2024	1.74	0.68	–	589	0.400	–	–	–
Hunt & Reffert	2023	1.79	0.82	0.64	362	–	–	–	–
Almeida et al.	2023	1.73	0.97	–	448	0.053	164*	0.54	–
Dias et al.	2021	1.81	1.02	–	305	0.154	–	–	–
Cantat-Gaudin et al.	2020	1.79	0.83	–	380	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 14063	78.2	299.86	37.21	0.53	-1.21	-2.25	-5.86	0.02

💡 Note: The % column shows the percentage of members that UBC 366 shares with each listed object.

Visualization

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