FSR 0539

(MWSC 134)

0.18 UTI

0.0

C_N

0.01

C_dens

0.25

C_C3

0.31

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 18

Radius (P>50% members) 10.7 [arcmin]

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.25 Low quality
C_lit 0.31 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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FSR 0539 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well above the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~5.38 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 Moderate extinction Old

Data

🔍 Search references for FSR 0539 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	–	25.799	74.426	0.186	-0.862	0.495	-163.142
Just et al.	2023	25.779	74.402	–	–	–	–
Kharchenko et al.	2016	25.779	74.402	–	–	–	–
Kharchenko et al.	2013	25.792	74.405	–	-0.35	1.29	–
Kharchenko et al.	2012	25.792	74.405	–	-0.35	1.29	–
Froebrich et al.	2007	25.808	74.43	–	–	–	–

💡 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]	Bfr	BSS
Just et al.	2023	–	–	–	2018	–	225	–	–
Kharchenko et al.	2016	2.12	1.62	–	2018	–	–	–	–
Kharchenko et al.	2013	2.12	1.62	–	2018	–	–	–	–
Kharchenko et al.	2012	2.12	1.62	–	2018	–	–	–	–

Visualization

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