Basel 8

(MWSC 907; OCL 499.1)

0.76 UTI

0.46

C_N

0.57

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 46

Stellar density (N₅₀/rad) 2.9 [N/pc²]

C3 classification AB

C_N 0.46 Poorly populated
C_dens 0.57 Moderately dense
C_C3 0.75 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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Basel 8 is a poorly populated, moderately 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, young 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 Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Basel 8 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–	98.542	8.006	0.646	-0.118	-2.32	23.044
Li et al.	2025	98.55	8.005	0.625	-0.129	-2.373	–
Almeida et al.	2025	98.558	8.038	–	–	–	–
Hunt & Reffert	2024	98.576	7.861	0.648	-0.126	-2.338	12.796
Cavallo et al.	2024	98.586	7.99	0.65	–	–	–
Hunt & Reffert	2023	98.576	7.861	0.648	-0.126	-2.338	12.796
Just et al.	2023	98.542	8.012	–	–	–	–
Dias et al.	2021	98.558	8.038	0.623	-0.134	-2.4	–
Cantat-Gaudin et al.	2020	98.55	8.005	0.625	-0.129	-2.373	–
Cantat-Gaudin & Anders	2020	98.55	8.005	0.625	-0.129	-2.373	–
Bica et al.	2019	98.6	8.074	–	–	–	–
Cantat-Gaudin et al.	2018	98.55	8.005	0.625	-0.129	-2.373	–
Loktin & Popova	2017	98.55	8.083	–	-0.617	-0.213	11.0
Kharchenko et al.	2016	98.542	8.012	–	–	–	–
Dias et al.	2014	98.55	8.083	–	-2.41	1.52	–
Kharchenko et al.	2013	98.55	8.01	–	-2.04	-0.47	11.0
Gozha et al.	2012	98.55	8.083	–	–	–	–
Piskunov et al.	2008	98.543	8.011	–	–	–	–
Kharchenko et al.	2007	98.55	8.08	–	0.25	–	11.0
van den Bergh	2006	98.55	8.017	–	–	–	–
Kharchenko et al.	2005	98.55	8.01	–	0.5	-2.29	11.0
Kharchenko et al.	2003	98.56	8.08	–	0.43	-2.13	–
Dias et al.	2002	98.55	8.083	–	-2.41	1.52	11.0

💡 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–	1.43	1.145	0.76	82	0.062	164	–	–
Li et al.	2025	1.77	0.96	–	56	0.062	–	–	–
Almeida et al.	2025	1.46	1.08	–	47	–	177	–	–
Hunt & Reffert	2024	–	–	–	–	–	152⁽¹⁾	–	–
Cavallo et al.	2024	1.47	0.78	–	200	0.540	–	–	–
Hunt & Reffert	2023	1.43	0.94	0.76	73	–	–	–	–
Just et al.	2023	–	–	–	84	–	126	–	–
Tarricq et al.	2022	1.45	–	–	79	–	–	–	–
Dias et al.	2021	1.46	1.08	–	47	0.028	–	–	–
Cantat-Gaudin et al.	2020	1.51	0.64	–	69	–	–	–	–
Cantat-Gaudin & Anders	2020	1.53	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.53	–	–	–	–	–	–	–
Loktin & Popova	2017	1.39	1.14	–	132	–	–	–	–
Kharchenko et al.	2016	1.43	1.16	–	84	–	–	–	–
Kharchenko et al.	2013	1.43	1.16	–	84	–	–	–	–
Gozha et al.	2012	1.33	–	–	126	–	871	–	–
Piskunov et al.	2008	1.33	1.15	–	48	–	–	–	–
van den Bergh	2006	1.33	1.15	–	102	–	–	–	–
Kharchenko et al.	2005	1.33	1.15	–	48	–	–	–	–
Kharchenko et al.	2003	1.33	1.15	–	–	–	–	–	–
Dias et al.	2002	1.33	1.15	–	126	–	–	–	–

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

Visualization

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