FSR 1709

(MWSC 2338)

0.23 UTI

0.0

C_N

0.02

C_dens

0.62

C_C3

0.25

C_lit

1.0

C_dup

C3 classification AC

Number of members (P>50%) 16

Radius (P>50% members) 3.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.02 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

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FSR 1709 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very large^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~11.64 kpc) differs significantly from the median photometric distance (~1.89 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 Intermediate age

Data

🔍 Search references for FSR 1709 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	–	239.382	-54.38	0.086	-4.953	-4.407	-97.775
Just et al.	2023	239.359	-54.374	–	–	–	–
Kharchenko et al.	2016	239.359	-54.374	–	–	–	–
Kharchenko et al.	2013	239.37	-54.375	–	-0.64	-1.0	-37.5
Froebrich et al.	2007	239.392	-54.363	–	–	–	–

💡 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	–	–	–	316	–	491	–	–
Kharchenko et al.	2016	1.89	2.06	–	316	–	–	–	–
Kharchenko et al.	2013	1.89	2.06	–	316	–	–	–	–

Visualization

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