Berkeley 8

(FSR 0545; MWSC 158; OCL 323; FoF 652)

0.89 UTI

1.0

C_N

1.0

C_dens

0.75

C_C3

0.84

C_lit

1.0

C_dup

N_m (P>50%) 761

Core radius and density 1.8 [pc], 14 [pc^-2]

C3 classification AB

C_N 1.0 Very rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.84 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 8 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, well above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is well-studied in the literature.

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

Distant Moderate extinction Massive Near-solar metallicity Old Contains BSS

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: 0.91 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.91 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.0555, e_all=0.0769.

Data

🔍 Search references for Berkeley 8 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–	30.292	75.486	0.282	2.652	0.375	-28.826
Hu & Soubiran	2025	30.309	75.478	–	–	–	–
Yang et al.	2025	30.297	75.491	–	–	–	–
Almeida et al.	2025	30.308	75.48	–	–	–	–
Hunt & Reffert	2024	30.297	75.491	0.285	2.664	0.375	-29.159
Cavallo et al.	2024	30.309	75.478	0.278	–	–	–
Hunt & Reffert	2023	30.297	75.491	0.285	2.664	0.375	-29.159
Almeida et al.	2023	30.306	75.481	–	–	–	–
Just et al.	2023	30.337	75.491	–	–	–	–
Jadhav & Subramaniam	2021	30.306	75.489	–	–	–	–
Dias et al.	2021	30.308	75.48	0.244	2.667	0.429	-28.168
Cantat-Gaudin et al.	2020	30.306	75.489	0.25	2.65	0.439	–
Cantat-Gaudin & Anders	2020	30.306	75.489	0.25	2.65	0.439	–
Liu & Pang	2019	30.276	75.472	0.277	2.656	0.467	–
Soubiran et al.	2018	30.306	75.489	–	–	–	-27.88
Bica et al.	2019	30.228	75.484	–	–	–	–
Cantat-Gaudin et al.	2018	30.306	75.489	0.25	2.65	0.439	–
Dias et al.	2018	–	–	–	2.04	0.35	–
Loktin & Popova	2017	30.27	75.483	–	2.113	-2.203	–
Sampedro et al.	2017	30.275	75.483	–	1.99	-1.56	–
Kharchenko et al.	2016	30.337	75.491	–	–	–	–
Dias et al.	2014	30.275	75.483	–	0.99	-3.08	–
Kharchenko et al.	2013	30.352	75.493	–	1.73	-1.85	–
Kharchenko et al.	2012	30.352	75.493	–	1.62	-1.82	–
Bukowiecki et al.	2011	30.283	75.489	–	–	–	–
Froebrich et al.	2007	30.296	75.487	–	–	–	–
Dias et al.	2002	30.275	75.483	–	0.99	-3.08	–
Lynga	1987	30.289	75.573	–	–	–	–

💡 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–	3.28	1.87	1.58	2143	-0.212	4347	0.83	3
Hu & Soubiran	2025	–	–	–	–	0.000⁽⁵⁾	–	–	–
Yang et al.	2025	–	–	–	1906	-0.290⁽³⁾	–	–	–
Almeida et al.	2025	3.20	2.08	–	3499	–	3259	–	–
Hunt & Reffert	2024	3.28	1.99	1.58	1921	–	4347⁽¹⁾	–	–
Cavallo et al.	2024	3.01	2.44	–	2512	-0.420	–	–	–
Hunt & Reffert	2023	3.28	1.99	1.58	1923	–	–	–	–
Almeida et al.	2023	3.01	2.21	–	3365	-0.175	1073⁽¹⁾	0.83	–
Just et al.	2023	–	–	–	1995	–	8831	–	–
Jadhav & Subramaniam	2021	3.34	1.75	–	3631	–	7094	–	3⁽¹⁾
Dias et al.	2021	3.20	2.08	–	3499	-0.077	–	–	–
Cantat-Gaudin et al.	2020	3.34	1.75	–	3631	–	–	–	–
Kounkel et al.	2020	3.19	1.67	–	2291	–	–	–	–
Cantat-Gaudin & Anders	2020	3.58	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1660	-0.250	–	–	–
Soubiran et al.	2018	3.58	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.58	–	–	–	–	–	–	–
Loktin & Popova	2017	2.30	2.55	–	1202	–	–	–	–
Kharchenko et al.	2016	5.00	1.26	–	1995	–	–	–	–
Kharchenko et al.	2013	5.00	1.26	–	1995	–	–	–	–
Kharchenko et al.	2012	5.00	1.26	–	1995	–	–	–	–
Bukowiecki et al.	2011	3.96⁽¹⁾	1.29	–	3162	–	–	–	–
Dias et al.	2002	3.15	2.37	–	3162	–	–	–	–
Lynga	1987	1.49	1.23	–	–	–	–	–	–

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

Visualization

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