FoF 198

(LP 198)

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0.49 UTI
0.8
CN
0.45
Cdens
0.75
CC3
0.23
Clit
1.0
Cdup
Nm (P>50%) 246
Core radius and density 3.2 [pc], 2.2 [pc-2]
C3 classification AB
  • CN 0.8 Rich
  • Cdens 0.45 Loose
  • CC3 0.75 High quality
  • Clit 0.23 Rarely 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 198 is a rich, loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate 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 rarely 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. Silver sample.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data
🔍 Search references for FoF 198 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– 112.123 -20.117 0.292 -2.25 2.507 67.724
Almeida et al. 2025 112.131 -20.109 – – – –
Hunt & Reffert 2024 112.13 -20.117 0.31 -2.253 2.506 67.753
Cavallo et al. 2024 112.133 -20.12 0.308 – – –
Hunt & Reffert 2023 112.13 -20.117 0.31 -2.253 2.506 67.753
Almeida et al. 2023 112.128 -20.107 – – – –
Li et al. 2023 112.128 -20.111 0.29 -2.28 2.54 –
Dias et al. 2021 112.131 -20.109 0.265 -2.262 2.505 –
Cantat-Gaudin et al. 2020 112.127 -20.107 0.278 -2.262 2.497 –
Liu & Pang 2019 112.115 -20.1 0.31 -1.972 2.311 –

💡 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– 2.845 1.09 2.06 276 -0.160 886 0.64 1
Almeida et al. 2025 2.84 1.19 – 294 – 488 – –
Hunt & Reffert 2024 2.85 0.91 2.06 173 – 886(1) – –
Cavallo et al. 2024 2.82 1.29 – 170 -0.160 – – –
Hunt & Reffert 2023 2.85 0.91 2.06 173 – – – –
Almeida et al. 2023 2.84 1.18 – 276 -0.127 916(1) 0.64 –
Li et al. 2023 4.17 1.00 – 631 0.097 – – 1(1)
Dias et al. 2021 2.84 1.19 – 294 -0.176 – – –
Cantat-Gaudin et al. 2020 3.22 0.54 – 257 – – – –
Liu & Pang 2019 – – – 537 -0.750 – – –

(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 635 76.4 112.12 -20.13 0.32 -2.23 2.48 67.72 0.05
UBC 223 74.4 112.12 -20.11 0.29 -2.25 2.52 67.72 0.0

💡 Note: The % column shows the percentage of members that FoF 198 shares with each listed object.

Visualization
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FoF 198 UCC
FoF 198 HUNT23
FoF 198 CANTAT20
Galactocentric position diagram