FSR 0166

(MWSC 3286; FoF 47)

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0.92 UTI
1.0
CN
1.0
Cdens
1.0
CC3
0.79
Clit
1.0
Cdup
Radius (P>50% members) 5.4 [arcmin]
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.79 Well-studied
  • Cdup 1.0 Unique

Overview

FSR 0166 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is well-studied in the literature.
Relatively close Moderate extinction Massive Near-solar metallicity Old

Cavallo et al. (2024): Gold sample.

Data

Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 303.381 25.427 0.324 -4.172 -6.67 -10.791
Hu & Soubiran 2025 303.379 25.42
Hunt & Reffert 2024 303.406 25.43 0.329 -4.168 -6.668 -11.412
Cavallo et al. 2024 303.379 25.42 0.325
Hunt & Reffert 2023 303.406 25.43 0.329 -4.168 -6.668 -11.412
Just et al. 2023 303.394 25.453
Cantat-Gaudin et al. 2020 303.385 25.43 0.331 -4.191 -6.659
Liu & Pang 2019 303.39 25.425 0.329 -4.14 -6.649
Soubiran et al. 2018 303.385 25.43 -12.36
Bica et al. 2019 303.41 25.454
Cantat-Gaudin et al. 2018 303.385 25.43 0.331 -4.191 -6.659
Kharchenko et al. 2016 303.394 25.453
Kharchenko et al. 2013 303.4 25.455 -3.37 -3.34
Froebrich et al. 2007 303.408 25.455

💡 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
Hu & Soubiran 2025 0.030*
Hunt & Reffert 2024 3708*
Cavallo et al. 2024 2.54 2.73 2692 -0.300
Hunt & Reffert 2023 2.80 2.75 1.81 1102
Just et al. 2023 1109 247
Cantat-Gaudin et al. 2020 2.81 2.24 2818
Liu & Pang 2019 2950 0.000
Soubiran et al. 2018 2.77
Cantat-Gaudin et al. 2018 2.77
Kharchenko et al. 2016 1.90 2.90 1109
Kharchenko et al. 2013 1.90 2.90 1109

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

Galactocentric position diagram

💡 Note: How are the galactocentric plots generated? See FAQ.