Stock 21

(FSR 0495; MWSC 52; OCL 293; FoF 680)

0.95 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 130

Stellar density (N₅₀/rad) 24.1 [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 1.0 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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Stock 21 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Stock 21 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–	7.593	57.925	0.476	-2.131	-1.88	-35.724
Li et al.	2025	7.59	57.922	0.51	-2.161	-1.787	–
Almeida et al.	2025	7.582	57.93	–	–	–	–
Zhang et al.	2024	7.601	57.921	–	–	–	–
Hunt & Reffert	2024	7.601	57.921	0.471	-2.127	-1.901	-35.704
Cavallo et al.	2024	7.589	57.939	0.472	–	–	–
Hunt & Reffert	2023	7.601	57.921	0.471	-2.127	-1.901	-35.704
Almeida et al.	2023	7.589	57.927	–	–	–	–
Just et al.	2023	7.553	57.927	–	–	–	–
Dias et al.	2021	7.582	57.93	0.509	-2.164	-1.784	–
Cantat-Gaudin et al.	2020	7.59	57.922	0.51	-2.161	-1.787	–
Sánchez et al.	2020	7.604	57.924	–	-2.128	-1.809	–
Cantat-Gaudin & Anders	2020	7.59	57.922	0.51	-2.161	-1.787	–
Liu & Pang	2019	7.606	57.938	0.502	-2.154	-1.778	–
Soubiran et al.	2018	7.59	57.922	–	–	–	-35.08
Bica et al.	2019	7.634	57.929	–	–	–	–
Cantat-Gaudin et al.	2018	7.59	57.922	0.51	-2.161	-1.787	–
Loktin & Popova	2017	7.605	57.924	–	-1.58	-2.232	–
Kharchenko et al.	2016	7.553	57.927	–	–	–	–
Dias et al.	2014	7.604	57.924	–	-2.34	-2.56	–
Kharchenko et al.	2013	7.561	57.931	–	-1.07	-2.76	–
Kharchenko et al.	2012	7.561	57.931	–	-1.28	-2.06	–
Piskunov et al.	2008	7.447	57.92	–	–	–	–
Froebrich et al.	2007	7.6	57.927	–	–	–	–
Kharchenko et al.	2005	7.45	57.92	–	-0.12	-1.52	–
Kharchenko et al.	2003	7.36	58.01	–	1.0	-1.34	–
Dias et al.	2002	7.604	57.924	–	-2.45	-2.72	–

💡 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–	1.77	1.29	1.01	458	-0.026	215	0.5	–
Li et al.	2025	1.89	1.29	–	366	0.249	–	–	–
Almeida et al.	2025	1.71	1.47	–	436	–	260	–	–
Zhang et al.	2024	–	–	–	–	-0.139⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	408⁽¹⁾	–	–
Cavallo et al.	2024	2.24	1.42	–	407	0.640	–	–	–
Hunt & Reffert	2023	1.93	1.27	1.01	402	–	–	–	–
Almeida et al.	2023	1.83	1.72	–	395	-0.055	170⁽¹⁾	0.50	–
Just et al.	2023	–	–	–	668	–	107	–	–
Dias et al.	2021	1.71	1.47	–	436	-0.053	–	–	–
Cantat-Gaudin et al.	2020	2.04	1.21	–	282	–	–	–	–
Cantat-Gaudin & Anders	2020	1.85	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	479	0.000	–	–	–
Soubiran et al.	2018	1.85	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.85	–	–	–	–	–	–	–
Loktin & Popova	2017	2.69	1.10	–	417	–	–	–	–
Kharchenko et al.	2016	1.70	1.29	–	668	–	–	–	–
Kharchenko et al.	2013	1.70	1.29	–	668	–	–	–	–
Kharchenko et al.	2012	1.70	1.29	–	668	–	–	–	–
Piskunov et al.	2008	1.10	1.24	–	525	–	–	–	–
Kharchenko et al.	2005	1.10	1.24	–	525	–	–	–	–
Kharchenko et al.	2003	1.11	1.55	–	–	–	–	–	–
Dias et al.	2002	1.70	1.29	–	668	–	–	–	–

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

Visualization

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