FSR 1786

(MWSC 2540)

0.25 UTI

0.0

C_N

0.0

C_dens

0.62

C_C3

0.31

C_lit

1.0

C_dup

C3 classification AC

Number of members (P>50%) 12

Radius (P>50% members) 6.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.0 Very loose
C_C3 0.62 Intermediate 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 1786 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very large^* distance, well above the mid-plane, affected by moderate extinction. It is catalogued as an extremely massive, old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~13.81 kpc) differs significantly from the median photometric distance (~7.13 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.

Very distant Moderate extinction Extremely massive Old

Data

🔍 Search references for FSR 1786 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	–	257.662	-25.093	0.072	-5.52	-5.398	30.421
Just et al.	2023	257.631	-25.076	–	–	–	–
Bica et al.	2019	257.631	-25.069	–	–	–	–
Kharchenko et al.	2016	257.631	-25.076	–	–	–	–
Kharchenko et al.	2013	257.64	-25.075	–	-5.88	-7.25	–
Froebrich et al.	2007	257.629	-25.073	–	–	–	–

💡 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	–	–	–	2512	–	232274	–	–
Kharchenko et al.	2016	7.13	2.26	–	2512	–	–	–	–
Kharchenko et al.	2013	7.13	2.26	–	2512	–	–	–	–

Visualization

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