FSR 0009

(MWSC 2921)

0.20 UTI

0.0

C_N

0.0

C_dens

0.38

C_C3

0.31

C_lit

1.0

C_dup

C3 classification CB

Number of members (P>50%) 10

Radius (P>50% members) 7.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.0 Very loose
C_C3 0.38 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 0009 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very large^* distance, well below 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 (~12.22 kpc) differs significantly from the median photometric distance (~5.17 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 0009 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	–	277.117	-31.901	0.082	-4.279	-5.397	61.824
Just et al.	2023	277.127	-31.907	–	–	–	–
Bica et al.	2019	277.12	-31.899	–	–	–	–
Kharchenko et al.	2016	277.127	-31.907	–	–	–	–
Kharchenko et al.	2013	277.137	-31.905	–	1.25	-6.83	–
Froebrich et al.	2007	277.121	-31.896	–	–	–	–

💡 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	–	–	–	1429	–	18793	–	–
Kharchenko et al.	2016	5.17	1.74	–	1429	–	–	–	–
Kharchenko et al.	2013	5.17	1.74	–	1429	–	–	–	–

Visualization

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