SBB 4

(Teutsch 328; MWSC 3620)

0.16 UTI

0.0

C_N

0.04

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 12

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 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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SBB 4 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~4.60 kpc) differs significantly from the median photometric distance (~2.12 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 Low extinction Old

Data

🔍 Search references for SBB 4 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–	335.843	56.626	0.217	-3.051	-1.985	-103.253
Bica et al.	2019	335.837	56.612	–	–	–	–
Loktin & Popova	2017	335.85	56.609	–	1.069	-3.481	–
Dias et al.	2014	335.85	56.608	–	1.1	-3.69	–
Dias et al.	2002	335.85	56.608	–	1.1	-3.69	–

💡 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–	2.12	0.965	–	1047	–	–	–	–
Loktin & Popova	2017	1.97	1.62	–	2089	–	–	–	–
Dias et al.	2002	2.27	0.31	–	5	–	–	–	–

Visualization

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