Berkeley 7

(MWSC 149)

0.88 UTI

0.76

C_N

1.0

C_dens

0.75

C_C3

0.94

C_lit

1.0

C_dup

N₅₀ (P>50% members) 128

Stellar density (N₅₀/rad) 22.4 [N/pc²]

C3 classification AB

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.94 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 7 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young 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 shares a very small percentage of members with 3 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

Liu et al. (2025)
Classified as primordial binary cluster 33 along with HSC_1060.

Palma et al. (2025)
Classified as genetic pair P188, along with HSC_1060.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for Berkeley 7 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–	28.547	62.371	0.341	-0.985	-0.206	-67.129
Almeida et al.	2025	28.549	62.367	–	–	–	–
Hunt & Reffert	2024	28.543	62.366	0.338	-1.019	-0.246	–
Cavallo et al.	2024	28.512	62.359	0.338	–	–	–
Hunt & Reffert	2023	28.543	62.366	0.338	-1.019	-0.246	–
Almeida et al.	2023	28.557	62.366	–	–	–	–
Just et al.	2023	28.533	62.367	–	–	–	–
Jaehnig et al.	2021	28.544	62.369	0.358	-0.981	-0.162	–
Rain et al.	2021	28.546	62.366	0.337	-0.993	-0.13	–
Dias et al.	2021	28.549	62.367	0.326	-0.967	-0.13	–
Cantat-Gaudin et al.	2020	28.546	62.366	0.337	-0.993	-0.13	–
Cantat-Gaudin & Anders	2020	28.546	62.366	0.337	-0.993	-0.13	–
Cantat-Gaudin et al.	2018	28.546	62.366	0.337	-0.993	-0.13	–
Loktin & Popova	2017	28.545	62.367	–	-4.554	-2.041	–
Kharchenko et al.	2016	28.533	62.367	–	–	–	–
Dias et al.	2014	28.55	62.367	–	-2.76	0.97	–
Kharchenko et al.	2013	28.545	62.37	–	-4.3	-1.95	–
Gozha et al.	2012	28.55	62.367	–	–	–	–
Kharchenko et al.	2012	28.545	62.37	–	-4.3	-1.95	–
Bukowiecki et al.	2011	28.538	62.376	–	–	–	–
Ahumada & Lapasset	2007	28.55	62.367	–	–	–	–
van den Bergh	2006	28.55	62.367	–	–	–	–
Dias et al.	2002	28.55	62.367	–	-2.76	0.97	–
Lynga	1987	28.53	62.362	–	–	–	–

💡 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–	2.6	2.2	2.19	19	-0.058	472	0.69	0
Liu et al.	2025	5.81	0.73	–	47	–	–	–	–
Almeida et al.	2025	2.39	2.12	–	40	–	710	–	–
Hunt & Reffert	2024	–	–	–	–	–	886⁽¹⁾	–	–
Cavallo et al.	2024	2.98	2.11	–	45	0.650	–	–	–
Hunt & Reffert	2023	2.64	2.06	2.19	36	–	–	–	–
Almeida et al.	2023	2.43	2.20	–	38	-0.058	472⁽¹⁾	0.69	–
Just et al.	2023	–	–	–	18	–	73	–	–
Jaehnig et al.	2021	2.75⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	2.73	2.52	–	4	–	–	–	0
Dias et al.	2021	2.39	2.12	–	40	0.090	–	–	–
Cantat-Gaudin et al.	2020	2.86	1.92	–	34	–	–	–	–
Kounkel et al.	2020	3.04	2.20	–	47	–	–	–	–
Cantat-Gaudin & Anders	2020	2.73	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.73	–	–	–	–	–	–	–
Loktin & Popova	2017	2.07	1.98	–	28	–	–	–	–
Kharchenko et al.	2016	2.60	2.52	–	18	–	–	–	–
Perren et al.	2015	1.80⁽¹⁾	2.84⁽¹⁾	–	20⁽¹⁾	-0.600⁽¹⁾	–	–	–
Kharchenko et al.	2013	2.60	2.52	–	18	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	409	–	–
Gozha et al.	2012	2.57	–	–	4	-0.250	–	–	–
Kharchenko et al.	2012	2.60	2.52	–	18	–	–	–	–
Bukowiecki et al.	2011	2.69⁽¹⁾	2.05	–	11	–	–	–	–
Ahumada & Lapasset	2007	–	2.52	–	4	–	–	–	0
van den Bergh	2006	2.57	2.52	–	4	–	–	–	–
Dias et al.	2002	2.57	2.52	–	4	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 2006	2.3	28.92	61.99	0.33	-1.07	-0.31	–	0.08
CWWDL 2617	0.8	27.99	62.7	0.33	-1.09	-0.23	–	0.3
CWWDL 2619	0.8	28.3	62.77	0.33	-1.0	-0.28	–	0.3

💡 Note: The % column shows the percentage of members that Berkeley 7 shares with each listed object.

Visualization

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