BDSB 93

(BDS2003 93; FSR 1155; MWSC 1030)

0.64 UTI

0.68

C_N

1.0

C_dens

0.62

C_C3

0.45

C_lit

1.0

C_dup

N₅₀ (P>50% members) 87

Stellar density (N₅₀/rad) 16.5 [N/pc²]

C3 classification AC

C_N 0.68 Moderately populated
C_dens 1.0 Very dense
C_C3 0.62 Intermediate quality
C_lit 0.45 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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BDSB 93 is a moderately populated, very dense object of intermediate 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, very young cluster, but with a large variance across recent sources for the absorption, age, and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Very young

Palma et al. (2025)
Classified as genetic pair P187, along with HSC_1740.

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.47 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.47 (50th percentile).

Bica et al. (2003)
Classified as infrared cluster (IRC).

Data

🔍 Search references for BDSB 93 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–	104.304	-8.221	0.748	-2.447	1.119	23.384
Almeida et al.	2025	104.295	-8.215	–	–	–	–
Hunt & Reffert	2024	104.295	-8.195	0.722	-2.332	1.248	20.909
Celli et al.	2024	104.297	-8.202	–	–	–	–
Cavallo et al.	2024	104.418	-8.384	0.726	–	–	–
Hunt & Reffert	2023	104.295	-8.195	0.722	-2.332	1.248	20.909
Just et al.	2023	104.288	-8.188	–	–	–	–
He et al.	2022	104.323	-8.285	0.801	-1.991	0.992	–
Dias et al.	2021	104.295	-8.215	0.751	-2.389	1.021	–
Cantat-Gaudin et al.	2020	104.297	-8.202	0.77	-2.41	1.021	–
Cantat-Gaudin & Anders	2020	104.297	-8.202	0.77	-2.41	1.021	–
Cantat-Gaudin et al.	2018	104.297	-8.202	0.77	-2.41	1.021	–
Kharchenko et al.	2016	104.288	-8.188	–	–	–	–
Kharchenko et al.	2013	104.295	-8.19	–	3.26	0.21	–
Froebrich et al.	2007	104.3	-8.187	–	–	–	–
Bica et al.	2003	104.31	-8.332	–	–	–	–

💡 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–	1.25	2.1	2.24	11	0.210	118	–	–
Almeida et al.	2025	1.02	2.23	–	12	–	153	–	–
Hunt & Reffert	2024	–	–	–	–	–	84⁽¹⁾	–	–
Celli et al.	2024	–	–	–	16	–	62	–	–
Cavallo et al.	2024	1.25	0.74	–	81	0.530	–	–	–
Hunt & Reffert	2023	1.28	1.22	2.24	7	–	–	–	–
Just et al.	2023	–	–	–	3	–	208	–	–
He et al.	2022	–	0.05	–	5	–	–	–	–
Dias et al.	2021	1.02	2.23	–	12	-0.109	–	–	–
Cantat-Gaudin et al.	2020	1.20	1.77	–	16	–	–	–	–
Kounkel et al.	2020	1.32	3.17	–	11	–	–	–	–
Cantat-Gaudin & Anders	2020	1.25	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.25	–	–	–	–	–	–	–
Kharchenko et al.	2016	2.17	2.10	–	3	–	–	–	–
Kharchenko et al.	2013	2.17	2.10	–	3	–	–	–	–

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

Visualization

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