Berkeley 93

(MWSC 3574; OCL 239)

0.72 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

0.42

C_lit

1.0

C_dup

N₅₀ (P>50% members) 132

Stellar density (N₅₀/rad) 7.2 [N/pc²]

C3 classification AA

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.42 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Berkeley 93 is a rich, very dense object of very high C3 quality. Its parallax locates it at a very large^* distance, well above the mid-plane, affected by high extinction. It is catalogued as a very massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~10.50 kpc) differs significantly from the median photometric distance (~7.10 kpc).

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

Very distant High extinction Very massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.10 (50th percentile).

Data

🔍 Search references for Berkeley 93 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–	328.864	63.938	0.095	-2.587	-1.464	-72.711
Hu & Soubiran	2025	328.889	63.938	–	–	–	–
Hunt & Reffert	2024	328.872	63.927	0.056	-2.483	-1.449	-72.713
Cavallo et al.	2024	328.889	63.938	0.056	–	–	–
Hunt & Reffert	2023	328.872	63.927	0.056	-2.483	-1.449	-72.713
Just et al.	2023	328.945	63.942	–	–	–	–
Bica et al.	2019	328.882	63.928	–	–	–	–
Kharchenko et al.	2016	328.945	63.942	–	–	–	–
Kharchenko et al.	2013	328.95	63.945	–	-1.27	-0.33	–
Kharchenko et al.	2012	328.875	63.94	–	-0.96	-1.03	–
Bukowiecki et al.	2011	328.875	63.935	–	–	–	–
van den Bergh	2006	329.05	63.933	–	–	–	–
Dias et al.	2002	329.05	63.933	–	-0.96	-1.03	–
Lynga	1987	329.044	63.933	–	–	–	–

💡 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–	7.1	4.73	1.46	100	-0.435	5876	–	–
Hu & Soubiran	2025	–	–	–	–	-0.400⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	1799⁽¹⁾	–	–
Cavallo et al.	2024	8.47	2.67	–	1622	-0.470	–	–	–
Hunt & Reffert	2023	10.77	3.13	1.46	497	–	–	–	–
Just et al.	2023	–	–	–	28	–	9954	–	–
Kharchenko et al.	2016	5.73	9.39	–	28	–	–	–	–
Kharchenko et al.	2013	5.73	9.39	–	28	–	–	–	–
Kharchenko et al.	2012	11.00	9.38	–	14	–	–	–	–
Bukowiecki et al.	2011	8.98⁽¹⁾	1.70	–	2512	–	–	–	–
van den Bergh	2006	5.60	4.73	–	100	–	–	–	–
Dias et al.	2002	5.60	4.73	–	100	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3125	58.3	328.87	63.94	0.12	-2.58	-1.43	-72.71	0.01

💡 Note: The % column shows the percentage of members that Berkeley 93 shares with each listed object.

Visualization

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