FSR 1579

(MWSC 1638)

0.07 UTI

0.0

C_N

0.02

C_dens

0.25

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 19

Core radius and density 2.5 [pc], 0.1 [pc^-2]

C3 classification BD

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.25 Low quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 1579 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, well below the mid-plane. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~3.42 kpc) differs significantly from the median photometric distance (~1.00 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 Old

Data

🔍 Search references for FSR 1579 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–	138.553	-77.413	0.292	-5.163	7.389	–
Bica et al.	2019	138.425	-77.439	–	–	–	–
Dib et al.	2018	138.42	-77.425	–	–	–	–
Froebrich et al.	2007	138.412	-77.436	–	–	–	–

💡 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–	1.0	–	–	3162	–	–	–	–
Dib et al.	2018	1.00	–	–	3162	–	–	–	–

Visualization

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