FSR 0306

(FoF 509)

0.71 UTI

0.76

C_N

0.58

C_dens

1.0

C_C3

0.61

C_lit

1.0

C_dup

N_m (P>50%) 120

Core radius and density 2.0 [pc], 2.9 [pc^-2]

C3 classification AA

C_N 0.76 Rich
C_dens 0.58 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.61 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0306 is a rich, moderately dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is moderately studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Relatively close High extinction Near-solar metallicity Intermediate age Contains BSS

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.63 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.63 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1401, e_all=0.0493.

Piecka & Paunzen (2021)
Belongs to cluster aggregate 'Agg28' along with NGC 7086.

Data

🔍 Search references for FSR 0306 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–	322.13	51.686	0.35	-2.146	-2.572	-37.309
Almeida et al.	2025	322.124	51.689	–	–	–	–
Zhang et al.	2024	322.119	51.69	–	–	–	–
Hunt & Reffert	2024	322.119	51.69	0.359	-2.174	-2.585	-28.367
Cavallo et al.	2024	322.125	51.693	0.358	–	–	–
Hunt & Reffert	2023	322.119	51.69	0.359	-2.174	-2.585	-28.367
Jadhav & Subramaniam	2021	322.129	51.69	–	–	–	–
Dias et al.	2021	322.124	51.689	0.349	-2.117	-2.539	-34.621
Spina et al.	2021	322.13	51.696	0.355	-2.11	-2.56	–
Cantat-Gaudin et al.	2020	322.129	51.69	0.349	-2.14	-2.536	–
Zhong et al.	2020	322.129	51.69	–	-2.14	-2.536	-38.787
Cantat-Gaudin & Anders	2020	322.129	51.69	0.349	-2.14	-2.536	–
Liu & Pang	2019	322.133	51.678	0.335	-2.099	-2.558	–
Soubiran et al.	2018	322.129	51.69	–	–	–	-34.63
Cantat-Gaudin et al.	2018	322.129	51.69	0.349	-2.14	-2.536	–
Dias et al.	2018	–	–	–	-3.84	-4.36	–
Sampedro et al.	2017	322.092	51.642	–	-1.94	-1.28	–
Dias et al.	2014	322.092	51.642	–	-2.46	-1.66	–
Froebrich et al.	2007	322.092	51.642	–	–	–	–
Dias et al.	2002	322.092	51.642	–	-2.46	-1.66	–

💡 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–	2.65	3.52	2.59	258	0.150	902	–	1
Almeida et al.	2025	2.17	3.09	–	50	–	611	–	–
Zhang et al.	2024	–	–	–	–	0.067⁽¹⁾	–	–	–
Hunt & Reffert	2024	2.59	3.85	2.59	258	–	1895⁽¹⁾	–	–
Cavallo et al.	2024	2.37	3.65	–	490	0.080	–	–	–
Hunt & Reffert	2023	2.58	3.85	2.59	258	–	–	–	–
Spina et al.	2022	–	–	–	–	0.155	–	–	–
Jadhav & Subramaniam	2021	2.68	2.79	–	513	–	902	–	1⁽¹⁾
Dias et al.	2021	2.17	3.09	–	50	0.180	–	–	–
Spina et al.	2021	2.81	–	–	513	0.150⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	2.68	2.79	–	513	–	–	–	–
Kounkel et al.	2020	2.74	3.52	–	182	–	–	–	–
Zhong et al.	2020	2.65⁽¹⁾	–	–	–	0.000	–	–	–
Cantat-Gaudin & Anders	2020	2.65	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	871	0.500	–	–	–
Soubiran et al.	2018	2.65	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.65	–	–	–	–	–	–	–
Dias et al.	2002	2.33	4.07	–	32	–	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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