BDSB 157

(BDS2003 157; MWSC 3121)

0.07 UTI

0.0

C_N

0.03

C_dens

0.12

C_C3

0.1

C_lit

1.0

C_dup

N_m (P>50%) 14

Core radius and density 2.0 [pc], 0.2 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.12 Very low quality
C_lit 0.1 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 157 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by high extinction. It is catalogued as a very young cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~2.99 kpc) differs significantly from the median photometric distance (~5.55 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.

Very distant High extinction Very young

Morales et al. (2013)
Classified as morphological type 'EC2' (partially embedded cluster). Morphological flag: cluster partially embedded, presence of emission related to PAH or warm dust.

Bica et al. (2003)
Classified as stellar group (IRGr).

Data

🔍 Search references for BDSB 157 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–	291.561	16.339	0.334	-3.251	-6.172	140.037
Just et al.	2023	291.504	16.328	–	–	–	–
Kharchenko et al.	2016	291.504	16.328	–	–	–	–
Kharchenko et al.	2013	291.51	16.33	–	0.37	-7.94	–
Morales et al.	2013	291.508	16.336	–	–	–	–
Bica et al.	2003	291.508	16.335	–	–	–	–

💡 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–	5.55	4.7	–	2	–	849	–	–
Just et al.	2023	–	–	–	2	–	849	–	–
Kharchenko et al.	2016	5.55	4.70	–	2	–	–	–	–
Kharchenko et al.	2013	5.55	4.70	–	2	–	–	–	–
Morales et al.	2013	5.14	–	–	–	–	–	–	–

Visualization

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