FSR 0304

(MWSC 3509)

0.19 UTI

0.0

C_N

0.03

C_dens

0.12

C_C3

0.39

C_lit

1.0

C_dup

N_m (P>50%) 15

Core radius and density 3.6 [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 0.39 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 0304 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, above the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~4.16 kpc) differs significantly from the median photometric distance (~1.42 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 Intermediate age

Data

🔍 Search references for FSR 0304 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–	321.145	51.309	0.24	-2.179	-3.383	–
Just et al.	2023	321.152	51.319	–	–	–	–
Donor et al.	2020	321.158	51.322	–	-3.9	-4.94	-68.3
Bica et al.	2019	321.131	51.34	–	–	–	–
Dias et al.	2018	–	–	–	-4.86	-2.02	–
Dib et al.	2018	321.157	51.322	–	–	–	–
Sampedro et al.	2017	321.129	51.339	–	-3.33	-6.79	–
Joshi et al.	2016	321.157	51.322	–	–	–	–
Kharchenko et al.	2016	321.152	51.319	–	–	–	–
Dias et al.	2014	321.129	51.339	–	-3.74	-6.97	–
Kharchenko et al.	2013	321.157	51.322	–	-0.99	-1.28	-1.5
Kharchenko et al.	2012	321.157	51.322	–	-0.99	-1.28	–
Froebrich et al.	2007	321.129	51.339	–	–	–	–
Dias et al.	2002	321.129	51.339	–	-3.74	-6.97	–

💡 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–	1.42	2.3	–	610	-0.070	41	–	–
Just et al.	2023	–	–	–	610	–	41	–	–
Spina et al.	2022	–	–	–	–	-0.070	–	–	–
Donor et al.	2020	–	–	–	–	-0.070	–	–	–
Dib et al.	2018	1.42	–	–	610	–	–	–	–
Joshi et al.	2016	1.42	2.30	–	610	–	–	–	–
Kharchenko et al.	2016	1.42	2.30	–	610	–	–	–	–
Kharchenko et al.	2013	1.42	2.30	–	610	–	–	–	–
Kharchenko et al.	2012	1.42	2.30	–	610	–	–	–	–
Dias et al.	2002	1.42	2.30	–	610	–	–	–	–

Visualization

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