Basel 1

(MWSC 2996; Apriamaswili 1; OCL 77)

0.94 UTI

0.71

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 92

Radius (P>50% members) 4.0 [arcmin]

C_N 0.71 Moderately populated
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 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Basel 1 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (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: intermediate fit. Isochrone match: good fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Basel 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	–	282.03	-5.875	0.525	-0.074	-4.52	22.16
Li et al.	2025	282.036	-5.876	0.525	-0.079	-4.509	–
Almeida et al.	2025	282.04	-5.885	–	–	–	–
Hunt & Reffert	2024	282.027	-5.87	0.523	-0.045	-4.494	22.172
Cavallo et al.	2024	282.034	-5.883	0.524	–	–	–
Hunt & Reffert	2023	282.027	-5.87	0.523	-0.045	-4.494	22.172
Just et al.	2023	282.031	-5.866	–	–	–	–
Dias et al.	2021	282.04	-5.885	0.53	-0.082	-4.521	24.096
Cantat-Gaudin et al.	2020	282.036	-5.876	0.525	-0.079	-4.509	–
Cantat-Gaudin & Anders	2020	282.036	-5.876	0.525	-0.079	-4.509	–
Soubiran et al.	2018	282.036	-5.876	–	–	–	22.69
Bica et al.	2019	282.033	-5.847	–	–	–	–
Cantat-Gaudin et al.	2018	282.036	-5.876	0.525	-0.079	-4.509	–
Loktin & Popova	2017	282.03	-5.865	–	0.959	-8.817	–
Kharchenko et al.	2016	282.031	-5.866	–	–	–	–
Dias et al.	2014	282.05	-5.85	–	-1.07	-3.24	–
Kharchenko et al.	2013	282.037	-5.865	–	0.36	-5.53	–
van den Bergh	2006	282.05	-5.85	–	–	–	–
Dias et al.	2002	282.05	-5.85	–	-1.07	-3.24	–

💡 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]	Bfr	BSS
Li et al.	2025	1.58	1.46	–	222	0.139	–	–	–
Almeida et al.	2025	1.52	1.59	–	178	–	261	–	–
Hunt & Reffert	2024	–	–	–	–	–	547*	–	–
Cavallo et al.	2024	1.71	2.21	–	89	-0.090	–	–	–
Hunt & Reffert	2023	1.75	1.57	1.16	210	–	–	–	–
Just et al.	2023	–	–	–	136	–	144	–	–
Dias et al.	2021	1.52	1.59	–	178	0.102	–	–	–
Cantat-Gaudin et al.	2020	1.85	1.24	–	229	–	–	–	–
Cantat-Gaudin & Anders	2020	1.80	–	–	–	–	–	–	–
Soubiran et al.	2018	1.80	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.80	–	–	–	–	–	–	–
Loktin & Popova	2017	2.19	1.51	–	77	–	–	–	–
Kharchenko et al.	2016	1.60	1.68	–	136	–	–	–	–
Kharchenko et al.	2013	1.60	1.68	–	136	–	–	–	–
van den Bergh	2006	2.18	1.49	–	78	–	–	–	–
Dias et al.	2002	2.18	1.49	–	78	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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