FSR 0306

(FoF 509)

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0.87 UTI
0.76
CN
1.0
Cdens
1.0
CC3
0.79
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 120
Radius (P>50% members) 3.7 [arcmin]
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.79 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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FSR 0306 is a rich, very 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 massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is well-studied in the literature.
Relatively close High extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

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 – 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
Dias et al. 2021 322.124 51.689 0.349 -2.117 -2.539 -34.621
Cantat-Gaudin et al. 2020 322.129 51.69 0.349 -2.14 -2.536 –
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. 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] Bfr BSS
Almeida et al. 2025 2.17 3.09 – 50 – 611 – –
Zhang et al. 2024 – – – – 0.067* – – –
Hunt & Reffert 2024 – – – – – 1895* – –
Cavallo et al. 2024 2.37 3.65 – 490 0.080 – – –
Hunt & Reffert 2023 2.58 3.85 2.59 258 – – – –
Dias et al. 2021 2.17 3.09 – 50 0.180 – – –
Cantat-Gaudin et al. 2020 2.68 2.79 – 513 – – – –
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 4.00 – 32 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization
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FSR 0306 UCC
FSR 0306 HUNT23
FSR 0306 CANTAT20
Galactocentric position diagram