Berkeley 99

(MWSC 3722; OCL 271; FSR 0455)

0.92 UTI

0.83

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 307

Radius (P>50% members) 3.2 [arcmin]

C3 classification AB

C_N 0.83 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Berkeley 99 is a rich, very dense object of high C3 quality. Its parallax locates it at a large distance, well above the mid-plane, affected by low extinction. It is catalogued as a massive, metal-poor, old cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is very well-studied in the literature.

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

Very distant Low extinction Massive Metal-poor Old Contains BSS

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Berkeley 99 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–	350.264	71.78	0.169	-3.075	-0.411	-59.816
Li et al.	2025	350.26	71.778	0.137	-3.139	-0.359	–
Hu & Soubiran	2025	350.239	71.774	–	–	–	–
Hunt & Reffert	2024	350.252	71.775	0.153	-3.077	-0.405	-59.525
Cavallo et al.	2024	350.239	71.774	0.154	–	–	–
Hunt & Reffert	2023	350.252	71.775	0.153	-3.077	-0.405	-59.525
Just et al.	2023	350.337	71.784	–	–	–	–
Jaehnig et al.	2021	350.274	71.784	0.166	-3.158	-0.376	–
Rain et al.	2021	350.26	71.778	0.137	-3.139	-0.359	–
Cantat-Gaudin et al.	2020	350.26	71.778	0.137	-3.139	-0.359	–
Sánchez et al.	2020	350.4	71.75	–	-3.088	-0.318	–
Cantat-Gaudin & Anders	2020	350.26	71.778	0.137	-3.139	-0.359	–
Soubiran et al.	2018	350.26	71.778	–	–	–	-60.0
Bica et al.	2019	350.368	71.772	–	–	–	–
Cantat-Gaudin et al.	2018	350.26	71.778	0.137	-3.139	-0.359	–
Loktin & Popova	2017	350.34	71.788	–	-2.171	-0.425	-62.3
Kharchenko et al.	2016	350.337	71.784	–	–	–	–
Dias et al.	2014	350.4	71.75	–	-2.44	-3.87	–
Kharchenko et al.	2013	350.344	71.788	–	-4.49	-0.69	-62.3
Gozha et al.	2012	350.4	71.75	–	–	–	–
Kharchenko et al.	2012	350.344	71.788	–	-4.49	-0.69	-62.28
van den Bergh	2006	350.4	71.75	–	–	–	–
Kharchenko et al.	2003	350.38	71.75	–	-6.26	-3.83	–
Dias et al.	2002	350.4	71.75	–	-2.44	-3.87	-62.28

💡 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–	5.0	0.93	1.89	3090	-0.580	1168	–	5.0
Li et al.	2025	4.90	1.03	–	4841	-0.130	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.280⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	1428⁽¹⁾	–	–
Cavallo et al.	2024	3.80	1.64	–	3090	-0.850	–	–	–
Hunt & Reffert	2023	5.50	1.52	1.89	968	–	–	–	–
Just et al.	2023	–	–	–	2228	–	908	–	–
Jaehnig et al.	2021	6.04⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	6.03	0.93	–	3162	–	–	–	5
Cantat-Gaudin et al.	2020	5.11	0.72	–	3388	–	–	–	–
Cantat-Gaudin & Anders	2020	6.03	–	–	–	–	–	–	–
Soubiran et al.	2018	6.03	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	6.03	–	–	–	–	–	–	–
Loktin & Popova	2017	3.09	0.99	–	2239	–	–	–	–
Kharchenko et al.	2016	5.00	0.93	–	2228	–	–	–	–
Kharchenko et al.	2013	5.00	0.93	–	2228	-0.580	–	–	–
Gozha et al.	2012	4.90	–	–	3162	-0.580	–	–	–
Kharchenko et al.	2012	5.00	0.93	–	2228	-0.580	–	–	–
van den Bergh	2006	4.90	0.93	–	3162	–	–	–	–
Kharchenko et al.	2003	4.90	0.93	–	–	–	–	–	–
Dias et al.	2002	4.90	0.93	–	3162	-0.580	–	–	–

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

Visualization

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