Berkeley 85

(MWSC 3311; Dolidze 41; OCL 160; OCL 163; FSR 0208; MWSC 3309)

0.96 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

0.9

C_lit

1.0

C_dup

N_m (P>50%) 687

Core radius and density 2.4 [pc], 9.7 [pc^-2]

C3 classification AA

C_N 1.0 Very rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.9 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Berkeley 85 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption, age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Distant Moderate extinction Massive Near-solar metallicity Intermediate age Contains BSS

Liu et al. (2025)
Classified as hyperbolic encounter pair 34 along with Gulliver_23.

Palma et al. (2025)
Part of multiple system G94, along with UBC_1100 and Gulliver_23.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1392, e_all=0.1208.

Bica et al. (2019)
Analysis of Dolidze objects by M. Kronberger reported in DAML02.

Data

🔍 Search references for Berkeley 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–	304.697	37.744	0.243	-2.937	-4.678	-34.091
Otto et al.	2026	304.699	37.731	–	-2.94	-4.68	-34.2
Almeida et al.	2025	304.694	37.75	–	–	–	–
Hunt & Reffert	2024	304.699	37.731	0.249	-2.953	-4.673	-26.033
Cavallo et al.	2024	304.701	37.746	0.244	–	–	–
Hunt & Reffert	2023	304.699	37.731	0.249	-2.953	-4.673	-26.033
Just et al.	2023	304.682	37.727	–	–	–	–
Jadhav & Subramaniam	2021	304.692	37.744	–	–	–	–
Dias et al.	2021	304.694	37.75	0.216	-2.947	-4.677	-33.478
Cantat-Gaudin et al.	2020	304.692	37.744	0.22	-2.94	-4.677	–
Zhong et al.	2020	304.692	37.744	–	-2.94	-4.677	-35.612
Cantat-Gaudin & Anders	2020	304.692	37.744	0.22	-2.94	-4.677	–
Monteiro & Dias	2019	304.704	37.75	–	-2.934	-4.678	2.322
Soubiran et al.	2018	304.692	37.744	–	–	–	-33.72
Bica et al.	2019	304.712	37.737	–	–	–	–
Cantat-Gaudin et al.	2018	304.692	37.744	0.22	-2.94	-4.677	–
Dias et al.	2018	–	–	–	-2.91	-5.33	–
Dib et al.	2018	304.687	37.73	–	–	–	–
Loktin & Popova	2017	304.725	37.758	–	-0.945	-0.945	-1.0
Sampedro et al.	2017	304.729	37.759	–	-0.36	-0.32	–
Joshi et al.	2016	304.687	37.73	–	–	–	–
Kharchenko et al.	2016	304.682	37.727	–	–	–	–
Tadross	2014	304.704	37.75	–	–	–	–
Dias et al.	2014	304.729	37.759	–	-1.45	-1.52	–
Kharchenko et al.	2013	304.687	37.73	–	-3.52	-2.78	–
Bukowiecki et al.	2011	304.688	37.721	–	–	–	–
Dias et al.	2002	304.729	37.759	–	-1.45	-1.52	–
Lynga	1987	304.719	37.709	–	–	–	–

💡 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–	3.3	2.77	2.48	417	0.060	3237	–	1
Otto et al.	2026	–	–	–	417	0.060⁽¹⁵⁾	–	–	–
Liu et al.	2025	9.38	1.11	–	224	–	–	–	–
Almeida et al.	2025	3.00	3.07	–	242	–	3237	–	–
Hunt & Reffert	2024	3.71	3.83	2.48	80	–	8390⁽¹⁾	–	–
Cavallo et al.	2024	3.24	3.75	–	182	0.240	–	–	–
Hunt & Reffert	2023	3.71	3.83	2.48	80	–	–	–	–
Just et al.	2023	–	–	–	1161	–	2234	–	–
Jadhav & Subramaniam	2021	3.53	2.77	–	417	–	5086	–	1⁽¹⁾
Dias et al.	2021	3.00	3.07	–	242	0.424	–	–	–
Cantat-Gaudin et al.	2020	3.53	2.77	–	417	–	–	–	–
Kounkel et al.	2020	3.57	3.14	–	219	–	–	–	–
Zhong et al.	2020	4.02⁽¹⁾	2.43	–	9065	0.000	–	–	–
Cantat-Gaudin & Anders	2020	4.02	–	–	–	–	–	–	–
Monteiro & Dias	2019	3.36	3.38	–	335	0.013	–	–	–
Soubiran et al.	2018	4.02	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	4.02	–	–	–	–	–	–	–
Dib et al.	2018	1.76	–	–	1161	–	–	–	–
Loktin & Popova	2017	3.07	2.63	–	759	–	–	–	–
Joshi et al.	2016	1.76	2.43	–	1161	–	–	–	–
Kharchenko et al.	2016	1.76	2.43	–	1161	–	–	–	–
Tadross	2014	1.76	1.67	–	400	–	–	–	–
Kharchenko et al.	2013	1.76	2.43	–	1161	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	3155	–	–
Bukowiecki et al.	2011	2.18⁽¹⁾	3.00	–	355	–	–	–	–
Dias et al.	2002	1.76	2.43	–	1000	–	–	–	–

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

Visualization

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