FSR 1698

(MWSC 2289)

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0.63 UTI
0.52
CN
0.31
Cdens
1.0
CC3
0.65
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 55
Radius (P>50% members) 5.8 [arcmin]
  • CN 0.52 Moderately populated
  • Cdens 0.31 Loose
  • CC3 1.0 Very high quality
  • Clit 0.65 Moderately 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 1698 is a moderately populated, loose 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, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is moderately studied in the literature.
Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FSR 1698 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 – 230.233 -59.622 0.285 -3.923 -3.585 51.426
Almeida et al. 2025 230.234 -59.627 – – – –
Hunt & Reffert 2024 230.233 -59.622 0.289 -3.901 -3.576 51.566
Cavallo et al. 2024 230.251 -59.607 0.29 – – –
Hunt & Reffert 2023 230.233 -59.622 0.289 -3.901 -3.576 51.566
Just et al. 2023 230.228 -59.618 – – – –
Dias et al. 2021 230.234 -59.627 0.248 -4.028 -3.531 –
Kharchenko et al. 2016 230.228 -59.618 – – – –
Dias et al. 2014 230.242 -59.628 – -6.07 -4.12 –
Kharchenko et al. 2013 230.241 -59.62 – -5.19 -2.3 –
Froebrich et al. 2007 230.242 -59.628 – – – –
Dias et al. 2002 230.242 -59.628 – -6.07 -4.12 –

💡 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
Almeida et al. 2025 3.12 2.91 – 14 – 1022 – –
Hunt & Reffert 2024 – – – – – 1130* – –
Cavallo et al. 2024 2.90 3.16 – 32 0.570 – – –
Hunt & Reffert 2023 3.07 3.23 2.33 12 – – – –
Just et al. 2023 – – – 363 – 199 – –
Dias et al. 2021 3.12 2.91 – 14 0.228 – – –
Kharchenko et al. 2016 1.56 2.71 – 363 – – – –
Kharchenko et al. 2013 1.56 2.71 – 363 – – – –
Dias et al. 2002 1.56 2.71 – 363 – – – –

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

Visualization
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FSR 1698 UCC
FSR 1698 HUNT23
Galactocentric position diagram