Dias 1

(MWSC 67; Alicante 4; Steine 11)

0.67 UTI

0.64

C_N

1.0

C_dens

0.5

C_C3

0.61

C_lit

1.0

C_dup

N₅₀ (P>50% members) 78

Stellar density (N₅₀/rad) 21.4 [N/pc²]

C3 classification BB

C_N 0.64 Moderately populated
C_dens 1.0 Very dense
C_C3 0.5 Intermediate 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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Dias 1 is a moderately populated, very dense object of intermediate 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, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg27' along with King 16.

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010). Asterisms and cluster alikes by B. Alessi reported in DAML02.

Data

🔍 Search references for Dias 1 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–	10.623	64.053	0.366	-2.748	-0.579	-46.489
Almeida et al.	2025	10.643	64.066	–	–	–	–
Hunt & Reffert	2024	10.637	64.054	0.366	-2.761	-0.61	-46.472
Cavallo et al.	2024	10.623	64.047	0.367	–	–	–
Hunt & Reffert	2023	10.637	64.054	0.366	-2.761	-0.61	-46.472
Just et al.	2023	10.642	64.057	–	–	–	–
Dias et al.	2021	10.643	64.066	0.378	-2.751	-0.508	–
Cantat-Gaudin et al.	2020	10.63	64.056	0.372	-2.752	-0.523	–
Sánchez et al.	2020	10.646	64.068	–	-2.72	-0.741	–
Cantat-Gaudin & Anders	2020	10.63	64.056	0.372	-2.752	-0.523	–
Bica et al.	2019	10.616	64.045	–	–	–	–
Cantat-Gaudin et al.	2018	10.63	64.056	0.372	-2.752	-0.523	–
Loktin & Popova	2017	10.65	64.068	–	-0.868	0.911	–
Sampedro et al.	2017	10.646	64.068	–	–	–	–
Kharchenko et al.	2016	10.642	64.057	–	–	–	–
Dias et al.	2014	10.646	64.068	–	-2.55	-2.0	–
Kharchenko et al.	2013	10.653	64.06	–	-0.86	1.33	–
Kharchenko et al.	2012	10.653	64.06	–	-0.86	1.33	–
Bukowiecki et al.	2011	10.625	64.045	–	–	–	–
Dias et al.	2002	10.646	64.068	–	-2.55	-2.0	–

💡 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–	2.34	2.96	1.47	79	-0.367	388	–	–
Almeida et al.	2025	2.63	2.98	–	10	–	372	–	–
Hunt & Reffert	2024	–	–	–	–	–	725⁽¹⁾	–	–
Cavallo et al.	2024	1.86	2.99	–	145	-0.540	–	–	–
Hunt & Reffert	2023	2.58	3.39	1.47	21	–	–	–	–
Just et al.	2023	–	–	–	79	–	187	–	–
Dias et al.	2021	2.63	2.98	–	10	-0.194	–	–	–
Cantat-Gaudin et al.	2020	2.61	2.35	–	30	–	–	–	–
Kounkel et al.	2020	2.53	2.59	–	182	–	–	–	–
Cantat-Gaudin & Anders	2020	2.49	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.49	–	–	–	–	–	–	–
Loktin & Popova	2017	1.56	2.54	–	186	–	–	–	–
Kharchenko et al.	2016	2.19	2.96	–	79	–	–	–	–
Kharchenko et al.	2013	2.19	2.96	–	79	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	404	–	–
Kharchenko et al.	2012	2.19	2.96	–	79	–	–	–	–
Bukowiecki et al.	2011	1.96⁽¹⁾	2.71	–	32	–	–	–	–
Dias et al.	2002	1.69	3.41	–	13	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Cmg 672	98.7	10.64	64.05	0.35	-2.74	-0.59	-46.49	0.26
OC 0228	39.7	10.64	64.05	0.36	-2.75	-0.62	-46.49	0.0

💡 Note: The % column shows the percentage of members that Dias 1 shares with each listed object.

Visualization

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