FSR 0821

(MWSC 642)

0.15 UTI

0.0

C_N

0.03

C_dens

0.12

C_C3

0.29

C_lit

1.0

C_dup

N_m (P>50%) 15

Core radius and density 3.4 [pc], 0.2 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.12 Very low quality
C_lit 0.29 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 0821 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~4.23 kpc) differs significantly from the median photometric distance (~1.21 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 Low mass Near-solar metallicity Old

Data

🔍 Search references for FSR 0821 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–	85.497	29.896	0.236	0.3	-2.07	-4.556
Just et al.	2023	85.461	29.92	–	–	–	–
Bica et al.	2019	85.476	29.906	–	–	–	–
Dias et al.	2018	–	–	–	-0.71	-4.56	–
Dib et al.	2018	85.47	29.92	–	–	–	–
Sampedro et al.	2017	85.471	29.905	–	-0.65	-0.2	–
Joshi et al.	2016	85.47	29.92	–	–	–	–
Kharchenko et al.	2016	85.461	29.92	–	–	–	–
Kharchenko et al.	2013	85.47	29.92	–	1.21	-4.02	–
Kharchenko et al.	2012	85.47	29.92	–	1.21	-4.02	–
Froebrich et al.	2007	85.471	29.905	–	–	–	–
Dias et al.	2002	85.471	29.905	–	-0.15	-2.41	–

💡 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–	1.21	1.77	–	1259	-0.210	12	–	–
Just et al.	2023	–	–	–	1259	–	12	–	–
Dib et al.	2018	1.21	–	–	1259	–	–	–	–
Joshi et al.	2016	1.21	1.77	–	1259	–	–	–	–
Kharchenko et al.	2016	1.21	1.77	–	1259	–	–	–	–
Kharchenko et al.	2013	1.21	1.77	–	1259	–	–	–	–
Kharchenko et al.	2012	1.21	1.77	–	1259	–	–	–	–
Dias et al.	2002	1.21	1.77	–	1259	-0.210	–	–	–

Visualization

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