UBC 85

0.53 UTI

0.6

C_N

0.39

C_dens

0.75

C_C3

0.46

C_lit

1.0

C_dup

N₅₀ (P>50% members) 69

Stellar density (N₅₀/rad) 1.9 [N/pc²]

C3 classification AB

C_N 0.6 Moderately populated
C_dens 0.39 Loose
C_C3 0.75 High quality
C_lit 0.46 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 85 is a moderately populated, loose object of 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 age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

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

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for UBC 85 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–	18.65	57.802	0.335	-3.65	-0.658	-42.362
Li et al.	2025	18.644	57.816	0.361	-3.697	-0.615	–
Almeida et al.	2025	18.684	57.848	–	–	–	–
Hunt & Reffert	2024	18.585	57.799	0.337	-3.633	-0.658	-55.625
Cavallo et al.	2024	18.935	57.795	0.344	–	–	–
Hunt & Reffert	2023	18.585	57.799	0.337	-3.633	-0.658	-55.625
Dias et al.	2021	18.684	57.848	0.345	-3.668	-0.589	–
Cantat-Gaudin et al.	2020	18.644	57.816	0.361	-3.697	-0.615	–
Cantat-Gaudin & Anders	2020	18.644	57.816	0.361	-3.697	-0.615	–
Castro-Ginard et al.	2019	18.682	57.861	0.36	-3.692	-0.54	–

💡 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–	2.55	1.49	0.52	138	-0.181	186	–	–
Li et al.	2025	2.17	1.23	–	489	-0.281	–	–	–
Almeida et al.	2025	2.25	1.49	–	170	–	230	–	–
Hunt & Reffert	2024	–	–	–	–	–	142⁽¹⁾	–	–
Cavallo et al.	2024	2.68	1.54	–	138	0.110	–	–	–
Hunt & Reffert	2023	2.54	1.22	0.52	116	–	–	–	–
Dias et al.	2021	2.25	1.49	–	170	-0.181	–	–	–
Cantat-Gaudin et al.	2020	2.61	1.10	–	85	–	–	–	–
Kounkel et al.	2020	2.59	1.58	–	38	–	–	–	–
Cantat-Gaudin & Anders	2020	2.56	–	–	–	–	–	–	–

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

Visualization

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