FSR 0398

(MWSC 3644; FoF 2255)

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0.91 UTI
0.79
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 206
Radius (P>50% members) 7.6 [arcmin]
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very 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 0398 is a rich, very dense object of high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.
Close Moderate extinction Near-solar metallicity Young

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit. Silver sample.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FSR 0398 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 – 339.134 64.163 1.049 -3.161 -1.162 -20.942
Li et al. 2025 339.135 64.153 1.043 -3.218 -1.109 –
Almeida et al. 2025 339.096 64.146 – – – –
Alfonso et al. 2024 339.278 64.153 1.043 -3.171 -1.218 –
Hunt & Reffert 2024 339.127 64.161 1.043 -3.122 -1.177 -18.16
Celli et al. 2024 339.135 64.153 – – – –
Cavallo et al. 2024 339.333 64.199 1.057 – – –
Hunt & Reffert 2023 339.127 64.161 1.043 -3.122 -1.177 -18.16
Almeida et al. 2023 339.081 64.158 – – – –
Just et al. 2023 339.053 64.129 – – – –
He et al. 2022 339.128 64.161 1.058 -3.157 -1.185 –
Dias et al. 2021 339.096 64.146 1.046 -3.213 -1.102 –
Cantat-Gaudin et al. 2020 339.135 64.153 1.043 -3.218 -1.109 –
Cantat-Gaudin & Anders 2020 339.135 64.153 1.043 -3.218 -1.109 –
Liu & Pang 2019 339.134 64.174 1.025 -3.199 -1.152 –
Bica et al. 2019 339.152 64.182 – – – –
Cantat-Gaudin et al. 2018 339.135 64.153 1.043 -3.218 -1.109 –
Kharchenko et al. 2016 339.053 64.129 – – – –
Kharchenko et al. 2013 339.06 64.133 – -2.37 -0.45 –
Kharchenko et al. 2012 339.06 64.133 – -2.37 -0.45 –
Froebrich et al. 2007 339.137 64.18 – – – –

💡 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
Li et al. 2025 0.67 2.00 – 23 -0.438 – – –
Almeida et al. 2025 0.92 1.96 – 22 – 228 – –
Alfonso et al. 2024 0.92 2.01 – 51 0.288 – – –
Hunt & Reffert 2024 – – – – – 441* – –
Celli et al. 2024 – – – 18 – 212 – –
Cavallo et al. 2024 0.99 2.17 – 8 -0.110 – – –
Hunt & Reffert 2023 0.91 1.86 1.35 14 – – – –
Almeida et al. 2023 0.91 2.07 – 18 -0.048 155* 0.74 –
Just et al. 2023 – – – 50 – 136 – –
He et al. 2022 – 2.20 – 13 – – – –
Dias et al. 2021 0.92 1.96 – 22 0.288 – – –
Cantat-Gaudin et al. 2020 0.92 2.01 – 18 – – – –
Cantat-Gaudin & Anders 2020 0.93 – – – – – – –
Liu & Pang 2019 – – – 16 -1.000 – – –
Cantat-Gaudin et al. 2018 0.93 – – – – – – –
Kharchenko et al. 2016 1.20 2.63 – 50 – – – –
Kharchenko et al. 2013 1.20 2.63 – 50 – – – –
Kharchenko et al. 2012 1.20 2.63 – 50 – – – –

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

Visualization
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FSR 0398 UCC
FSR 0398 HUNT23
FSR 0398 CANTAT20
Galactocentric position diagram