FSR 1663

(SAI 117; MWSC 2148)

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0.95 UTI
0.76
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 121
Radius (P>50% members) 2.5 [arcmin]
  • CN 0.76 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-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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FSR 1663 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate 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 FSR 1663 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 – 205.237 -60.204 0.31 -5.032 -2.44 -28.9
Li et al. 2025 205.251 -60.203 0.27 -5.031 -2.464 –
Hu & Soubiran 2025 205.229 -60.201 – – – –
Almeida et al. 2025 205.247 -60.2 – – – –
Hunt & Reffert 2024 205.239 -60.205 0.329 -5.044 -2.435 -28.397
Cavallo et al. 2024 205.229 -60.201 0.322 – – –
Hunt & Reffert 2023 205.239 -60.205 0.329 -5.044 -2.435 -28.397
Just et al. 2023 205.259 -60.194 – – – –
Dias et al. 2021 205.247 -60.2 0.278 -5.009 -2.429 -28.822
Cantat-Gaudin et al. 2020 205.251 -60.203 0.27 -5.031 -2.464 –
Cantat-Gaudin & Anders 2020 205.251 -60.203 0.27 -5.031 -2.464 –
Soubiran et al. 2018 205.251 -60.203 – – – -28.49
Bica et al. 2019 205.275 -60.199 – – – –
Cantat-Gaudin et al. 2018 205.251 -60.203 0.27 -5.031 -2.464 –
Kharchenko et al. 2016 205.259 -60.194 – – – –
Kharchenko et al. 2013 205.27 -60.197 – -6.24 -0.08 –
Glushkova et al. 2010 205.269 -60.208 – – – –
Froebrich et al. 2007 205.271 -60.197 – – – –

💡 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 3.06 2.99 – 1075 0.375 – – –
Hu & Soubiran 2025 – – – – -0.440* – – –
Almeida et al. 2025 2.92 2.92 – 1125 – 1002 – –
Hunt & Reffert 2024 – – – – – 1164* – –
Cavallo et al. 2024 2.58 2.96 – 1148 0.190 – – –
Hunt & Reffert 2023 2.82 3.37 2.00 265 – – – –
Just et al. 2023 – – – 141 – 62 – –
Dias et al. 2021 2.92 2.92 – 1125 0.088 – – –
Cantat-Gaudin et al. 2020 2.94 2.42 – 1288 – – – –
Cantat-Gaudin & Anders 2020 3.35 – – – – – – –
Soubiran et al. 2018 3.35 – – – – – – –
Cantat-Gaudin et al. 2018 3.35 – – – – – – –
Kharchenko et al. 2016 1.51 1.94 – 141 – – – –
Kharchenko et al. 2013 1.51 1.94 – 141 – – – –
Glushkova et al. 2010 2.15 3.13 – 794 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0599 40.5 205.24 -60.2 0.31 -5.04 -2.45 -28.85 0.0

💡 Note: The % column shows the percentage of members that FSR 1663 shares with each listed object.

Visualization
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FSR 1663 UCC
FSR 1663 HUNT23
FSR 1663 CANTAT20
Galactocentric position diagram