BDSB 23

(MWSC 3497)

0.18 UTI

0.0

C_N

0.03

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 15

Stellar density (N₅₀/rad) 0.2 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.38 Low quality
C_lit 0.25 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 23 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by high extinction. It is catalogued as a massive, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

⚠️ 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.

Very distant High extinction Massive Intermediate age

Data

🔍 Search references for BDSB 23 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–	320.088	55.477	0.147	-2.782	-2.612	-134.33
Just et al.	2023	320.096	55.466	–	–	–	–
Kharchenko et al.	2016	320.096	55.466	–	–	–	–
Kharchenko et al.	2013	320.1	55.47	–	1.6	-3.71	–
Kharchenko et al.	2012	320.1	55.47	–	1.34	-5.94	–

💡 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–	5.88	3.87	–	141	–	1837	–	–
Just et al.	2023	–	–	–	141	–	1837	–	–
Kharchenko et al.	2016	5.88	3.87	–	141	–	–	–	–
Kharchenko et al.	2013	5.88	3.87	–	141	–	–	–	–
Kharchenko et al.	2012	7.17	3.10	–	891	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 4047	4.0	320.09	55.46	0.12	-2.51	-2.62	-85.43	0.05

💡 Note: The % column shows the percentage of members that BDSB 23 shares with each listed object.

Visualization

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