UBC 442

0.74 UTI

0.61

C_N

1.0

C_dens

1.0

C_C3

0.55

C_lit

1.0

C_dup

N₅₀ (P>50% members) 72

Stellar density (N₅₀/rad) 5.3 [N/pc²]

C3 classification AA

C_N 0.61 Moderately populated
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

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

Overview

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UBC 442 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a moderate 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.

Distant Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

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

Data

🔍 Search references for UBC 442 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–	100.576	-4.624	0.221	0.169	-0.281	39.287
Li et al.	2025	100.581	-4.624	0.194	0.184	-0.22	–
Almeida et al.	2025	100.576	-4.616	–	–	–	–
Zhang et al.	2024	100.584	-4.605	–	–	–	–
Hunt & Reffert	2024	100.584	-4.605	0.223	0.173	-0.272	43.972
Cavallo et al.	2024	100.582	-4.627	0.226	–	–	–
Hunt & Reffert	2023	100.584	-4.605	0.223	0.173	-0.272	43.972
Almeida et al.	2023	100.576	-4.616	–	–	–	–
Dias et al.	2021	100.576	-4.616	0.197	0.197	-0.226	–
Cantat-Gaudin et al.	2020	100.581	-4.624	0.194	0.184	-0.22	–
Castro-Ginard et al.	2020	100.586	-4.623	0.197	0.195	-0.214	–

💡 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–	4.0	1.22	1.57	757	-0.113	646	0.83	–
Li et al.	2025	3.67	1.10	–	708	0.059	–	–	–
Almeida et al.	2025	4.61	1.40	–	757	–	646	–	–
Zhang et al.	2024	–	–	–	–	-0.113⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	813⁽¹⁾	–	–
Cavallo et al.	2024	3.40	0.99	–	1096	0.180	–	–	–
Hunt & Reffert	2023	4.00	1.22	1.57	698	–	–	–	–
Almeida et al.	2023	3.86	1.46	–	897	-0.202	472⁽¹⁾	0.83	–
Dias et al.	2021	4.61	1.40	–	757	-0.140	–	–	–
Cantat-Gaudin et al.	2020	4.19	0.70	–	1445	–	–	–	–

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

Visualization

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