UBC 221

0.66 UTI

0.76

C_N

1.0

C_dens

0.75

C_C3

0.4

C_lit

1.0

C_dup

N₅₀ (P>50% members) 127

Stellar density (N₅₀/rad) 16.7 [N/pc²]

C3 classification AB

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.4 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 221 is a rich, very dense object of high 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 is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 221 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–	114.297	-15.68	0.401	-1.254	2.848	37.636
Li et al.	2025	114.297	-15.681	0.423	-1.217	2.821	–
Hu & Soubiran	2025	114.303	-15.687	–	–	–	–
Hunt & Reffert	2024	114.3	-15.677	0.392	-1.257	2.853	35.032
Cavallo et al.	2024	114.303	-15.686	0.395	–	–	–
Hunt & Reffert	2023	114.3	-15.677	0.392	-1.257	2.853	35.032
Cantat-Gaudin et al.	2020	114.297	-15.681	0.423	-1.217	2.821	–
Castro-Ginard et al.	2020	114.295	-15.674	0.424	-1.221	2.816	–

💡 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–	2.325	1.145	1.54	792	-0.140	615	–	–
Li et al.	2025	2.60	1.35	–	540	0.075	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.210⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	615⁽¹⁾	–	–
Cavallo et al.	2024	2.16	1.30	–	891	-0.140	–	–	–
Hunt & Reffert	2023	2.26	0.78	1.54	877	–	–	–	–
Cantat-Gaudin et al.	2020	2.39	0.99	–	708	–	–	–	–

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

Visualization

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