Stock 18

(MWSC 4)

0.66 UTI

0.34

C_N

1.0

C_dens

0.75

C_C3

0.61

C_lit

1.0

C_dup

N_m (P>50%) 34

Core radius and density 0.7 [pc], 9.4 [pc^-2]

C3 classification AB

C_N 0.34 Poorly populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.61 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Stock 18 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above 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 age and mass parameters (see Parameters). It is moderately studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.92 (50th percentile), false positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.92 (50th percentile), false positive? (human-assigned).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.0267, e_all=0.0895.

Data

🔍 Search references for Stock 18 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–	0.404	64.627	0.325	-2.668	-0.64	–
Hunt & Reffert	2024	0.404	64.624	0.324	-2.679	-0.685	–
Celli et al.	2024	0.399	64.625	–	–	–	–
Cavallo et al.	2024	0.404	64.629	0.326	–	–	–
Hunt & Reffert	2023	0.404	64.624	0.324	-2.679	-0.685	–
Just et al.	2023	0.388	64.622	–	–	–	–
Cantat-Gaudin et al.	2020	0.399	64.625	0.294	-2.692	-0.587	–
Cantat-Gaudin & Anders	2020	0.399	64.625	0.294	-2.692	-0.587	–
Soubiran et al.	2018	0.399	64.625	–	–	–	-66.81
Cantat-Gaudin et al.	2018	0.399	64.625	0.294	-2.692	-0.587	–
Loktin & Popova	2017	0.405	64.624	–	-4.298	-4.763	–
Sampedro et al.	2017	0.404	64.625	–	-2.47	0.42	–
Joshi et al.	2016	0.397	64.625	–	–	–	–
Kharchenko et al.	2016	0.388	64.622	–	–	–	–
Dias et al.	2014	0.404	64.625	–	-2.78	-0.15	–
Kharchenko et al.	2013	0.397	64.625	–	-3.59	-1.15	–
Kharchenko et al.	2012	0.397	64.625	–	-3.41	-1.17	–
Bukowiecki et al.	2011	0.4	64.623	–	–	–	–
Dias et al.	2002	0.404	64.625	–	-2.78	-0.15	–
Lynga	1987	0.411	64.638	–	–	–	–

💡 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–	2.49	1.795	1.76	126	0.320	196	–	–
Hunt & Reffert	2024	2.84	2.06	1.76	5	–	358⁽¹⁾	–	–
Celli et al.	2024	–	–	–	13	–	245	–	–
Cavallo et al.	2024	2.49	1.65	–	13	0.320	–	–	–
Hunt & Reffert	2023	2.84	2.06	1.76	5	–	–	–	–
Just et al.	2023	–	–	–	479	–	3	–	–
Cantat-Gaudin et al.	2020	2.86	1.94	–	13	–	–	–	–
Kounkel et al.	2020	2.93	2.43	–	71	–	–	–	–
Cantat-Gaudin & Anders	2020	3.10	–	–	–	–	–	–	–
Soubiran et al.	2018	3.10	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.10	–	–	–	–	–	–	–
Loktin & Popova	2017	1.06	1.13	–	380	–	–	–	–
Joshi et al.	2016	0.77	0.56	–	479	–	–	–	–
Kharchenko et al.	2016	0.77	0.56	–	479	–	–	–	–
Kharchenko et al.	2013	0.77	0.56	–	479	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	148	–	–
Kharchenko et al.	2012	0.75	0.32	–	653	–	–	–	–
Bukowiecki et al.	2011	1.25⁽¹⁾	2.18	–	126	–	–	–	–
Dias et al.	2002	1.24	2.24	–	126	–	–	–	–

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

Visualization

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