FSR 1642

(MWSC 2112)

0.17 UTI

0.0

C_N

0.11

C_dens

0.12

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 15

Stellar density (N₅₀/rad) 0.5 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.11 Very loose
C_C3 0.12 Very low quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 1642 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate distance, well below the mid-plane, affected by low extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

⚠️ 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.

Distant Low extinction Old

Data

🔍 Search references for FSR 1642 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–	200.594	-73.573	0.265	-7.563	-0.686	-24.519
Just et al.	2023	200.686	-73.572	–	–	–	–
Bica et al.	2019	200.617	-73.567	–	–	–	–
Kharchenko et al.	2016	200.686	-73.572	–	–	–	–
Kharchenko et al.	2013	200.7	-73.575	–	-7.47	-2.35	–
Froebrich et al.	2007	200.629	-73.571	–	–	–	–

💡 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–	3.21	0.64	–	3162	–	705	–	–
Just et al.	2023	–	–	–	3162	–	705	–	–
Kharchenko et al.	2016	3.21	0.64	–	3162	–	–	–	–
Kharchenko et al.	2013	3.21	0.64	–	3162	–	–	–	–

Visualization

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