FSR 1170

(MWSC 1111)

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0.62 UTI
0.67
CN
1.0
Cdens
0.38
CC3
0.52
Clit
1.0
Cdup
Nm (P>50%) 84
Core radius and density 1.4 [pc], 5.4 [pc-2]
C3 classification CB
  • CN 0.67 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 0.38 Low quality
  • Clit 0.52 Moderately studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
FSR 1170 is a moderately populated, very dense object of low 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 distance and age parameters (see Parameters). It is moderately studied in the literature.

Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 147 along with FSR_1173.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P215, along with FSR_1173.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.3471, e_all=0.3616.

Data
πŸ” Search references for FSR 1170 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 106.867 -8.87 0.334 -0.682 -0.171 42.608
Almeida et al. 2025 106.87 -8.876 – – – –
Hunt & Reffert 2024 106.872 -8.872 0.34 -0.686 -0.144 42.608
Cavallo et al. 2024 106.856 -8.867 0.345 – – –
Hunt & Reffert 2023 106.872 -8.872 0.34 -0.686 -0.144 42.608
Just et al. 2023 106.868 -8.863 – – – –
Dias et al. 2021 106.87 -8.876 0.331 -0.643 -0.201 –
Cantat-Gaudin et al. 2020 106.873 -8.879 0.33 -0.639 -0.213 –
SΓ‘nchez et al. 2020 106.862 -8.867 – -0.541 -0.123 –
Cantat-Gaudin & Anders 2020 106.873 -8.879 0.33 -0.639 -0.213 –
Soubiran et al. 2018 106.873 -8.879 – – – 42.84
Cantat-Gaudin et al. 2018 106.873 -8.879 0.33 -0.639 -0.213 –
Sampedro et al. 2017 106.862 -8.867 – 1.02 -4.17 –
Kharchenko et al. 2016 106.868 -8.863 – – – –
Kharchenko et al. 2013 106.875 -8.865 – 7.48 -1.65 –
Froebrich et al. 2007 106.862 -8.867 – – – –
Dias et al. 2002 106.862 -8.867 – 0.83 -1.82 –

πŸ’‘ 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– 2.74 2.1 1.98 326 0.013 227 – –
Liu et al. 2025 10.23 0.93 – 129 – – – –
Almeida et al. 2025 2.69 2.33 – 328 – 227 – –
Hunt & Reffert 2024 2.54 2.02 1.98 324 – 578(1) – –
Cavallo et al. 2024 2.88 2.67 – 229 -0.110 – – –
Hunt & Reffert 2023 2.54 2.02 1.98 324 – – – –
Just et al. 2023 – – – 569 – 192 – –
Dias et al. 2021 2.69 2.33 – 328 0.136 – – –
Cantat-Gaudin et al. 2020 3.10 1.85 – 195 – – – –
Kounkel et al. 2020 2.79 2.72 – 135 – – – –
Cantat-Gaudin & Anders 2020 2.79 – – – – – – –
Soubiran et al. 2018 2.79 – – – – – – –
Cantat-Gaudin et al. 2018 2.79 – – – – – – –
Kharchenko et al. 2016 2.28 2.10 – 569 – – – –
Kharchenko et al. 2013 2.28 2.10 – 569 – – – –
Dias et al. 2002 2.28 2.10 – 569 – – – –

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

Visualization
ℹ️
FSR 1170 UCC
FSR 1170 HUNT23
FSR 1170 CANTAT20
Galactocentric position diagram