BDSB 3

(MWSC 2805)

0.06 UTI

0.0

C_N

0.04

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 9

Stellar density (N₅₀/rad) 0.2 [N/pc²]

C3 classification CC

C_N 0.0 Sparse
C_dens 0.04 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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BDSB 3 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by high extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~2.90 kpc) differs significantly from the median photometric distance (~1.51 kpc).

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close High extinction Intermediate age

Data

🔍 Search references for BDSB 3 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–	271.628	-21.608	0.344	-0.316	-2.394	–
Just et al.	2023	271.575	-21.621	–	–	–	–
Kharchenko et al.	2016	271.575	-21.621	–	–	–	–
Kharchenko et al.	2013	271.582	-21.62	–	-0.1	-4.11	22.4

💡 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–	1.51	3.36	–	180	–	62	–	–
Just et al.	2023	–	–	–	180	–	62	–	–
Kharchenko et al.	2016	1.51	3.36	–	180	–	–	–	–
Kharchenko et al.	2013	1.51	3.36	–	180	–	–	–	–

Visualization

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