UBC 630

0.37 UTI

0.5

C_N

0.09

C_dens

0.75

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 51

Core radius and density 1.9 [pc], 0.4 [pc^-2]

C3 classification AB

C_N 0.5 Moderately populated
C_dens 0.09 Very loose
C_C3 0.75 High quality
C_lit 0.26 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 630 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a moderate 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 age parameter (see Parameters). It is poorly studied in the literature.

Relatively close Low extinction Near-solar metallicity Intermediate age

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 207 along with HSC_1799.

Palma et al. (2025)
Classified as genetic pair P218, along with HSC_1799.

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

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 UBC 630 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–	112.836	-12.683	0.46	-2.563	2.658	107.184
Li et al.	2025	112.836	-12.699	0.42	-2.62	2.66	–
Almeida et al.	2025	112.851	-12.703	–	–	–	–
Hunt & Reffert	2024	112.836	-12.782	0.468	-2.546	2.633	-16.995
Cavallo et al.	2024	112.844	-12.702	0.471	–	–	–
Hunt & Reffert	2023	112.836	-12.782	0.468	-2.546	2.633	-16.995
Dias et al.	2021	112.851	-12.703	0.424	-2.585	2.663	–
Cantat-Gaudin et al.	2020	112.836	-12.699	0.42	-2.62	2.66	–
Castro-Ginard et al.	2020	112.855	-12.708	0.419	-2.617	2.663	–

💡 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–	2.19	0.49	1.23	141	0.040	128	–	–
Liu et al.	2025	3.09	0.25	–	141	–	–	–	–
Li et al.	2025	2.10	0.67	–	181	-0.145	–	–	–
Almeida et al.	2025	2.28	0.81	–	76	–	147	–	–
Hunt & Reffert	2024	1.97	0.17	1.23	193	–	110⁽¹⁾	–	–
Cavallo et al.	2024	2.19	0.49	–	302	0.080	–	–	–
Hunt & Reffert	2023	1.97	0.17	1.23	193	–	–	–	–
Dias et al.	2021	2.28	0.81	–	76	0.040	–	–	–
Cantat-Gaudin et al.	2020	2.22	0.48	–	126	–	–	–	–
Kounkel et al.	2020	2.06	1.14	–	52	–	–	–	–

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

Visualization

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