Basel 11b

(MWSC 696; OCL 469.1; FSR 0877)

0.90 UTI

0.77

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 160

Radius (P>50% members) 5.6 [arcmin]

C_N 0.77 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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Basel 11b is a rich, very dense object of 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, but with a large variance across recent sources for the age and mass parameters (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 Basel 11b 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	–	89.55	21.962	0.549	1.02	-4.144	2.774
Li et al.	2025	89.547	21.965	0.534	1.046	-4.137	–
Almeida et al.	2025	89.543	21.968	–	–	–	–
Zhang et al.	2024	89.55	21.974	–	–	–	–
Hunt & Reffert	2024	89.55	21.974	0.564	1.024	-4.132	3.805
Cavallo et al.	2024	89.532	21.959	0.562	–	–	–
Hunt & Reffert	2023	89.55	21.974	0.564	1.024	-4.132	3.805
Almeida et al.	2023	89.54	21.969	–	–	–	–
Just et al.	2023	89.554	21.991	–	–	–	–
Dias et al.	2021	89.543	21.968	0.512	1.048	-4.156	3.651
Cantat-Gaudin et al.	2020	89.547	21.965	0.534	1.046	-4.137	–
Sánchez et al.	2020	89.55	21.967	–	0.998	-4.203	–
Donor et al.	2020	89.562	21.99	–	1.08	-4.22	3.2
Cantat-Gaudin & Anders	2020	89.547	21.965	0.534	1.046	-4.137	–
Bossini et al.	2019	89.547	21.965	–	–	–	–
Soubiran et al.	2018	89.547	21.965	–	–	–	3.43
Bica et al.	2019	89.547	21.979	–	–	–	–
Cantat-Gaudin et al.	2018	89.547	21.965	0.534	1.046	-4.137	–
Loktin & Popova	2017	109.275	-13.966	–	-0.565	-3.607	–
Kharchenko et al.	2016	89.554	21.991	–	–	–	–
Dias et al.	2014	89.55	21.967	–	0.53	-1.37	–
Kharchenko et al.	2013	89.562	21.99	–	2.3	-3.89	–
Piskunov et al.	2008	89.543	21.966	–	–	–	–
van den Bergh	2006	89.55	21.967	–	–	–	–
Kharchenko et al.	2005	89.55	21.97	–	-0.29	-3.33	–
Dias et al.	2002	89.55	21.967	–	0.53	-1.37	–

💡 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	1.67	1.66	–	456	-0.009	–	–	–
Almeida et al.	2025	1.69	1.88	–	279	–	398	–	–
Zhang et al.	2024	–	–	–	–	-0.110*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	568*	–	–
Cavallo et al.	2024	1.70	1.81	–	324	0.150	–	–	–
Hunt & Reffert	2023	1.67	1.62	1.17	284	–	–	–	–
Almeida et al.	2023	1.66	1.92	–	286	-0.093	412*	0.61	–
Just et al.	2023	–	–	–	955	–	35	–	–
Dias et al.	2021	1.69	1.88	–	279	0.041	–	–	–
Cantat-Gaudin et al.	2020	1.79	1.56	–	229	–	–	–	–
Donor et al.	2020	–	–	–	–	0.000	–	–	–
Cantat-Gaudin & Anders	2020	1.78	–	–	–	–	–	–	–
Bossini et al.	2019	1.86	1.44	–	303	0.000	–	–	–
Soubiran et al.	2018	1.78	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.78	–	–	–	–	–	–	–
Loktin & Popova	2017	1.71	0.98	–	65	–	–	–	–
Kharchenko et al.	2016	1.32	0.97	–	955	–	–	–	–
Kharchenko et al.	2013	1.32	0.97	–	955	–	–	–	–
Piskunov et al.	2008	1.50	0.31	–	661	–	–	–	–
van den Bergh	2006	1.69	0.99	–	66	–	–	–	–
Kharchenko et al.	2005	1.50	0.31	–	661	–	–	–	–
Dias et al.	2002	1.80	1.49	–	251	–	–	–	–

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

Visualization

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