FoF 321

(LP 321)

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0.73 UTI
0.79
CN
1.0
Cdens
0.75
CC3
0.55
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 202
Radius (P>50% members) 3.3 [arcmin]
  • CN 0.79 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.55 Moderately 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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FoF 321 is a rich, very dense object of 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 and metallicity parameters (see Parameters). It is moderately studied in the literature.

Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.

Relatively close High extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FoF 321 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 – 296.39 21.153 0.449 -0.355 -3.57 -18.195
Li et al. 2025 296.389 21.153 0.434 -0.36 -3.531 –
Hu & Soubiran 2025 296.384 21.165 – – – –
Almeida et al. 2025 296.389 21.152 – – – –
Hunt & Reffert 2024 296.386 21.163 0.446 -0.372 -3.568 -13.504
Cavallo et al. 2024 296.384 21.165 0.444 – – –
Hunt & Reffert 2023 296.386 21.163 0.446 -0.372 -3.568 -13.504
Dias et al. 2021 296.389 21.152 0.426 -0.372 -3.526 -18.357
Cantat-Gaudin et al. 2020 296.389 21.153 0.434 -0.36 -3.531 –
Liu & Pang 2019 296.396 21.148 0.423 -0.36 -3.504 –

💡 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 2.08 3.00 – 918 0.445 – – –
Hu & Soubiran 2025 – – – – 0.010* – – –
Almeida et al. 2025 2.02 3.09 – 726 – 1239 – –
Hunt & Reffert 2024 – – – – – 2593* – –
Cavallo et al. 2024 1.87 3.54 – 724 -0.080 – – –
Hunt & Reffert 2023 2.07 3.73 1.85 249 – – – –
Dias et al. 2021 2.02 3.09 – 726 0.047 – – –
Cantat-Gaudin et al. 2020 2.07 2.47 – 1175 – – – –
Liu & Pang 2019 – – – 676 0.500 – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 127 100.0 296.39 21.15 0.45 -0.37 -3.57 -18.11 0.2
OC 0085 19.8 296.4 21.17 0.46 -0.38 -3.54 -18.05 0.0

💡 Note: The % column shows the percentage of members that FoF 321 shares with each listed object.

Visualization
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FoF 321 UCC
FoF 321 HUNT23
FoF 321 CANTAT20
Galactocentric position diagram