UBC 300

0.77 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

0.55

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 115

Radius (P>50% members) 5.7 [arcmin]

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.55 Moderately studied
C_dup 1.0 Unique

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

Overview

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UBC 300 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate 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 significant percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 300 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	–	222.943	-65.312	0.528	-3.266	-2.026	-6.01
Li et al.	2025	222.958	-65.308	0.509	-3.241	-2.041	–
Almeida et al.	2025	222.988	-65.313	–	–	–	–
Hunt & Reffert	2024	222.953	-65.313	0.529	-3.278	-2.031	-8.922
Cavallo et al.	2024	222.964	-65.313	0.528	–	–	–
Hunt & Reffert	2023	222.953	-65.313	0.529	-3.278	-2.031	-8.922
Almeida et al.	2023	223.019	-65.326	–	–	–	–
Dias et al.	2021	222.988	-65.313	0.509	-3.243	-2.05	–
Cantat-Gaudin et al.	2020	222.958	-65.308	0.509	-3.241	-2.041	–
Castro-Ginard et al.	2020	222.979	-65.312	0.509	-3.236	-2.042	–

💡 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	2.45	–	281	-0.160	–	–	–
Almeida et al.	2025	1.82	2.21	–	341	–	507	–	–
Hunt & Reffert	2024	–	–	–	–	–	705*	–	–
Cavallo et al.	2024	1.85	2.06	–	457	0.570	–	–	–
Hunt & Reffert	2023	1.75	2.13	1.49	232	–	–	–	–
Almeida et al.	2023	1.75	2.17	–	347	0.105	500*	0.64	–
Dias et al.	2021	1.82	2.21	–	341	0.113	–	–	–
Cantat-Gaudin et al.	2020	1.88	1.71	–	417	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 3466	61.7	222.92	-65.3	0.53	-3.27	-2.02	-6.01	0.0

💡 Note: The % column shows the percentage of members that UBC 300 shares with each listed object.

Visualization

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