FoF 5

(LP 5)

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0.49 UTI
0.76
CN
0.17
Cdens
1.0
CC3
0.26
Clit
1.0
Cdup
Nm (P>50%) 130
Core radius and density 3.2 [pc], 0.8 [pc-2]
C3 classification AA
  • CN 0.76 Rich
  • Cdens 0.17 Very loose
  • CC3 1.0 Very high quality
  • Clit 0.26 Poorly studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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FoF 5 is a rich, very loose object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is poorly studied in the literature.

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

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

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data
🔍 Search references for FoF 5 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– 156.138 -72.526 0.518 -6.883 1.468 -23.217
Hu & Soubiran 2025 156.008 -72.5 – – – –
Almeida et al. 2025 156.06 -72.511 – – – –
Hunt & Reffert 2024 156.323 -72.546 0.525 -6.893 1.485 -22.41
Cavallo et al. 2024 156.008 -72.5 0.524 – – –
Hunt & Reffert 2023 156.323 -72.546 0.525 -6.893 1.485 -22.41
Jadhav & Subramaniam 2021 156.138 -72.51 – – – –
Dias et al. 2021 156.06 -72.511 0.515 -6.887 1.468 -22.954
Spina et al. 2021 156.208 -72.527 0.51 -6.879 1.449 –
Cantat-Gaudin et al. 2020 156.138 -72.51 0.51 -6.89 1.462 –
Liu & Pang 2019 156.145 -72.508 0.506 -6.873 1.425 –

💡 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] Bfrac BSS
UCC 99999– 1.825 0.27 0.42 2570 0.002 967 – 5
Hu & Soubiran 2025 – – – – -0.250(5) – – –
Almeida et al. 2025 1.78 0.33 – 2570 – 967 – –
Hunt & Reffert 2024 1.81 0.12 0.42 2324 – 337(1) – –
Cavallo et al. 2024 1.84 0.27 – 1995 0.280 – – –
Hunt & Reffert 2023 1.80 0.12 0.42 2323 – – – –
Jadhav & Subramaniam 2021 1.84 0.27 – 2692 – 2459 – 5(1)
Dias et al. 2021 1.78 0.33 – 2570 0.004 – – –
Spina et al. 2021 1.96 – – 2692 – – – –
Cantat-Gaudin et al. 2020 1.84 0.27 – 2692 – – – –
Liu & Pang 2019 – – – 3160 0.000 – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
UBC 274 100.0 156.26 -72.56 0.52 -6.88 1.46 -23.51 0.21
OC 0560 1.5 154.51 -72.17 0.52 -6.87 1.69 -22.78 0.05

💡 Note: The % column shows the percentage of members that FoF 5 shares with each listed object.

Visualization
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FoF 5 UCC
FoF 5 HUNT23
FoF 5 CANTAT20
Galactocentric position diagram