BDSB 91

(MWSC 861)

0.78 UTI

0.6

C_N

1.0

C_dens

0.75

C_C3

0.78

C_lit

1.0

C_dup

N₅₀ (P>50% members) 71

Stellar density (N₅₀/rad) 59.7 [N/pc²]

C3 classification AB

C_N 0.6 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.78 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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BDSB 91 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is well-studied in the literature.

Close Moderate extinction Near-solar metallicity Very young

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

Cavallo et al. (2024)
Wood sample.

Data

🔍 Search references for BDSB 91 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–	96.318	-10.558	1.094	-3.169	1.29	27.772
Almeida et al.	2025	96.329	-10.546	–	–	–	–
Alfonso et al.	2024	97.701	-9.55	0.981	-3.202	0.652	–
Hunt & Reffert	2024	96.316	-10.558	1.049	-3.125	1.229	41.44
Celli et al.	2024	96.319	-10.551	–	–	–	–
Cavallo et al.	2024	96.34	-10.536	1.09	–	–	–
Hunt & Reffert	2023	96.316	-10.558	1.049	-3.125	1.229	41.44
Just et al.	2023	96.316	-10.553	–	–	–	–
He et al.	2022	96.322	-10.55	1.105	-3.143	1.237	–
Dias et al.	2021	96.329	-10.546	1.018	-3.101	1.164	–
Cantat-Gaudin et al.	2020	96.319	-10.551	1.033	-3.183	1.15	–
Cantat-Gaudin & Anders	2020	96.319	-10.551	1.033	-3.183	1.15	–
Cantat-Gaudin et al.	2018	96.319	-10.551	1.033	-3.183	1.15	–
Kharchenko et al.	2016	96.316	-10.553	–	–	–	–
Kharchenko et al.	2013	96.322	-10.555	–	0.21	-0.74	–

💡 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–	0.95	1.55	2.2	5	0.007	123	–	–
Almeida et al.	2025	0.91	1.47	–	5	–	110	–	–
Alfonso et al.	2024	0.96	1.80	–	44	0.007	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	83⁽¹⁾	–	–
Celli et al.	2024	–	–	–	14	–	136	–	–
Cavallo et al.	2024	1.45	1.46	–	91	0.090	–	–	–
Hunt & Reffert	2023	0.86	1.55	2.20	5	–	–	–	–
Just et al.	2023	–	–	–	4	–	176	–	–
He et al.	2022	–	1.55	–	5	–	–	–	–
Dias et al.	2021	0.91	1.47	–	5	0.007	–	–	–
Cantat-Gaudin et al.	2020	0.96	1.80	–	14	–	–	–	–
Cantat-Gaudin & Anders	2020	0.94	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.94	–	–	–	–	–	–	–
Kharchenko et al.	2016	1.92	4.19	–	4	–	–	–	–
Kharchenko et al.	2013	1.92	4.19	–	4	–	–	–	–

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

Visualization

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