FSR 1659

(MWSC 2144; 2144)

0.23 UTI

0.0

C_N

0.28

C_dens

0.25

C_C3

0.31

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 21

Radius (P>50% members) 3.2 [arcmin]

C_N 0.0 Sparse
C_dens 0.28 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 1659 is a sparse, loose object of low C3 quality. Its parallax locates it at a moderate^* distance, near 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 (~4.19 kpc) differs significantly from the median photometric distance (~1.76 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 1659 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	–	204.507	-62.462	0.238	-6.735	-1.866	125.317
Just et al.	2023	204.493	-62.482	–	–	–	–
Bica et al.	2019	204.513	-62.466	–	–	–	–
Kharchenko et al.	2016	204.493	-62.482	–	–	–	–
Kharchenko et al.	2013	204.504	-62.485	–	-11.91	-0.18	–
Froebrich et al.	2007	204.504	-62.465	–	–	–	–

💡 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	–	–	–	207	–	439	–	–
Kharchenko et al.	2016	1.76	2.58	–	207	–	–	–	–
Kharchenko et al.	2013	1.76	2.58	–	207	–	–	–	–

Visualization

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