FSR 1685

(MWSC 2262)

0.18 UTI

0.0

C_N

0.03

C_dens

0.25

C_C3

0.31

C_lit

1.0

C_dup

C3 classification DB

Number of members (P>50%) 14

Radius (P>50% members) 7.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.03 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

ℹ️

FSR 1685 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.94 kpc) differs significantly from the median photometric distance (~1.51 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 FSR 1685 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	224.314	-64.986	0.254	-5.985	-4.275	-53.373
Just et al.	2023	224.296	-64.943	–	–	–	–
Bica et al.	2019	224.355	-64.943	–	–	–	–
Kharchenko et al.	2016	224.296	-64.943	–	–	–	–
Kharchenko et al.	2013	224.31	-64.945	–	-3.64	-0.62	–
Froebrich et al.	2007	224.342	-64.943	–	–	–	–

💡 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	–	–	–	1778	–	89	–	–
Kharchenko et al.	2016	1.51	0.97	–	1778	–	–	–	–
Kharchenko et al.	2013	1.51	0.97	–	1778	–	–	–	–

Visualization

ℹ️