Bica 4

(MWSC 1174)

0.32 UTI

0.3

C_N

0.42

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 30

Stellar density (N₅₀/rad) 2.1 [N/pc²]

C3 classification BC

C_N 0.3 Poorly populated
C_dens 0.42 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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Bica 4 is a poorly populated, loose object of low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by high extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~2.59 kpc) differs significantly from the median photometric distance (~3.93 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.

Distant High extinction Intermediate age

Data

🔍 Search references for Bica 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–	109.751	-22.014	0.386	-2.037	2.193	–
Just et al.	2023	109.774	-22.018	–	–	–	–
Kharchenko et al.	2016	109.774	-22.018	–	–	–	–
Kharchenko et al.	2013	109.779	-22.02	–	-6.81	2.88	19.0
Dias et al.	2002	109.779	-22.028	–	-6.81	2.88	19.0

💡 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–	3.93	3.16	–	133	–	849	–	–
Just et al.	2023	–	–	–	133	–	849	–	–
Kharchenko et al.	2016	3.93	3.16	–	133	–	–	–	–
Kharchenko et al.	2013	3.93	3.16	–	133	–	–	–	–
Dias et al.	2002	3.93	2.91	–	63	–	–	–	–

Visualization

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