BDSB 166

(MWSC 2606)

0.13 UTI

0.0

C_N

0.54

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 22

Stellar density (N₅₀/rad) 2.7 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.54 Moderately dense
C_C3 0.12 Very 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 166 is a sparse, moderately dense object of very low C3 quality. Its parallax locates it at a relatively close^* distance, near the mid-plane, affected by high extinction. It is catalogued as an extremely massive, very young cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~1.61 kpc) differs significantly from the median photometric distance (~6.75 kpc).

Note: This object shares a moderate percentage of members with at least one entry reported in the same catalogue. 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 Extremely massive Very young

Data

🔍 Search references for BDSB 166 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–	262.208	-36.566	0.621	-1.676	-2.807	-10.348
Just et al.	2023	262.235	-36.562	–	–	–	–
Kharchenko et al.	2016	262.235	-36.562	–	–	–	–
Kharchenko et al.	2013	262.245	-36.562	–	-2.78	-0.54	–

💡 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–	6.75	3.39	–	1	–	18535	–	–
Just et al.	2023	–	–	–	1	–	18535	–	–
Kharchenko et al.	2016	6.75	3.39	–	1	–	–	–	–
Kharchenko et al.	2013	6.75	3.39	–	1	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
BDSB 165	40.0	262.33	-36.65	0.49	-1.61	-2.54	-19.16	0.27

💡 Note: The % column shows the percentage of members that BDSB 166 shares with each listed object.

Visualization

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