Berkeley 2

(MWSC 41; OCL 289; FSR 0489)

0.83 UTI

0.86

C_N

1.0

C_dens

0.75

C_C3

0.77

C_lit

1.0

C_dup

N_m (P>50%) 399

Core radius and density 1.4 [pc], 9.8 [pc^-2]

C3 classification AB

C_N 0.86 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.77 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 2 is a rich, very dense object of high C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster (see Parameters). It is well-studied in the literature.

Very distant Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.67 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.67 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1611, e_all=0.0262.

Data

🔍 Search references for Berkeley 2 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–	6.317	60.392	0.135	-1.113	-0.369	-77.548
Otto et al.	2026	6.322	60.391	–	-1.1	-0.3	-76.8
Hu & Soubiran	2025	6.321	60.394	–	–	–	–
Almeida et al.	2025	6.319	60.394	–	–	–	–
Hunt & Reffert	2024	6.322	60.391	0.147	-1.134	-0.394	-77.716
Cavallo et al.	2024	6.321	60.394	0.131	–	–	–
Hunt & Reffert	2023	6.322	60.391	0.147	-1.134	-0.394	-77.716
Just et al.	2023	6.307	60.379	–	–	–	–
Jadhav & Subramaniam	2021	6.319	60.392	–	–	–	–
Dias et al.	2021	6.319	60.394	0.123	-1.091	-0.301	–
Cantat-Gaudin et al.	2020	6.319	60.392	0.117	-1.101	-0.304	–
Cantat-Gaudin & Anders	2020	6.319	60.392	0.117	-1.101	-0.304	–
Soubiran et al.	2018	6.319	60.392	–	–	–	-76.35
Bica et al.	2019	6.311	60.397	–	–	–	–
Cantat-Gaudin et al.	2018	6.319	60.392	0.117	-1.101	-0.304	–
Dias et al.	2018	–	–	–	-1.81	-0.46	–
Kharchenko et al.	2016	6.307	60.379	–	–	–	–
Dias et al.	2014	6.325	60.4	–	0.26	-3.41	–
Kharchenko et al.	2013	6.316	60.382	–	1.07	-2.68	–
Gozha et al.	2012	6.325	60.4	–	–	–	–
Kharchenko et al.	2012	6.316	60.382	–	0.88	-2.5	–
Bukowiecki et al.	2011	6.317	60.389	–	–	–	–
van den Bergh	2006	6.325	60.4	–	–	–	–
Dias et al.	2002	6.325	60.4	–	0.88	-2.5	–
Lynga	1987	6.311	60.397	–	–	–	–

💡 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–	5.58	2.43	1.96	794	-0.250	1998	–	0
Otto et al.	2026	–	–	–	589	-0.190⁽¹⁵⁾	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.310⁽⁵⁾	–	–	–
Almeida et al.	2025	6.95	2.56	–	681	–	1589	–	–
Hunt & Reffert	2024	5.66	2.33	1.96	598	–	3857⁽¹⁾	–	–
Cavallo et al.	2024	4.81	2.16	–	1445	-0.120	–	–	–
Hunt & Reffert	2023	5.66	2.33	1.96	598	–	–	–	–
Just et al.	2023	–	–	–	955	–	1409	–	–
Jadhav & Subramaniam	2021	6.92	2.34	–	589	–	2406	–	0⁽¹⁾
Dias et al.	2021	6.95	2.56	–	681	-0.160	–	–	–
Cantat-Gaudin et al.	2020	6.92	2.34	–	589	–	–	–	–
Kounkel et al.	2020	4.86	2.00	–	1096	–	–	–	–
Cantat-Gaudin & Anders	2020	6.83	–	–	–	–	–	–	–
Soubiran et al.	2018	6.83	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	6.83	–	–	–	–	–	–	–
Kharchenko et al.	2016	5.50	2.84	–	955	–	–	–	–
Kharchenko et al.	2013	5.50	2.84	–	955	–	–	–	–
Gozha et al.	2012	5.25	–	–	794	-0.590	–	–	–
Kharchenko et al.	2012	5.50	2.84	–	977	–	–	–	–
Bukowiecki et al.	2011	4.70⁽¹⁾	1.96	–	1122	–	–	–	–
Paunzen et al.	2010	–	–	–	–	-0.590	–	–	–
van den Bergh	2006	5.25	2.52	–	794	–	–	–	–
Dias et al.	2002	5.25	2.52	–	794	–	–	–	–

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

Visualization

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