UBC 1621

0.33 UTI

0.26

C_N

0.41

C_dens

0.38

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 26

Stellar density (N₅₀/rad) 2.1 [N/pc²]

C3 classification CB

C_N 0.26 Poorly populated
C_dens 0.41 Loose
C_C3 0.38 Low quality
C_lit 0.3 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 1621 is a poorly populated, loose object of low 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, young cluster (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 386 along with Theia_1742, and of multiple system 63 along with Theia_1742 and HSC_2145.

Palma et al. (2025)
Part of multiple system G139, along with Theia_1742 and HSC_2145.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for UBC 1621 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–	132.075	-49.181	0.581	-6.597	5.609	–
Liu et al.	2025	132.09	-49.19	0.59	-6.61	5.66	–
Hunt & Reffert	2024	132.09	-49.192	0.589	-6.608	5.664	–
Cavallo et al.	2024	132.084	-49.168	0.59	–	–	–
Hunt & Reffert	2023	132.09	-49.192	0.589	-6.608	5.664	–
Castro-Ginard et al.	2022	132.1	-49.23	0.58	-6.57	5.6	–

💡 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–	1.72	1.06	0.73	87	0.010	64	–	–
Liu et al.	2025	2.70	0.46	–	76	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	64⁽¹⁾	–	–
Cavallo et al.	2024	1.56	1.16	–	98	0.010	–	–	–
Hunt & Reffert	2023	1.63	1.27	0.73	181	–	–	–	–
Castro-Ginard et al.	2022	1.81	0.96	–	65	–	–	–	–

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

Visualization

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