FSR 1700

(MWSC 2307)

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0.60 UTI
0.72
CN
0.44
Cdens
0.75
CC3
0.55
Clit
1.0
Cdup
C3 classification AB
Number of members (P>50%) 93
Radius (P>50% members) 1.4 [arcmin]
  • CN 0.72 Moderately populated
  • Cdens 0.44 Loose
  • CC3 0.75 High quality
  • Clit 0.55 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 1700 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a very large* distance, well 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 metallicity parameters (see Parameters). It is moderately studied in the literature.

(*): The parallax distance estimate (~16.03 kpc) differs significantly from the median photometric distance (~5.82 kpc).

Very distant Moderate extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for FSR 1700 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 – 234.696 -59.258 0.062 -4.856 -4.008 10.389
Hu & Soubiran 2025 234.718 -59.26 – – – –
Hunt & Reffert 2024 234.694 -59.264 0.067 -4.866 -3.99 18.438
Cavallo et al. 2024 234.718 -59.26 0.069 – – –
Hunt & Reffert 2023 234.694 -59.264 0.067 -4.866 -3.99 18.438
Just et al. 2023 234.691 -59.252 – – – –
Bica et al. 2019 234.723 -59.253 – – – –
Kharchenko et al. 2016 234.691 -59.252 – – – –
Kharchenko et al. 2013 234.705 -59.253 – -3.26 -0.43 –
Froebrich et al. 2007 234.721 -59.248 – – – –

💡 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 – – – – -0.390* – – –
Hunt & Reffert 2024 – – – – – 2961* – –
Cavallo et al. 2024 9.29 2.71 – 7586 0.090 – – –
Hunt & Reffert 2023 11.25 4.47 1.75 1279 – – – –
Just et al. 2023 – – – 804 – 470 – –
Kharchenko et al. 2016 2.36 2.29 – 804 – – – –
Kharchenko et al. 2013 2.36 2.29 – 804 – – – –

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

Visualization
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FSR 1700 UCC
FSR 1700 HUNT23
Galactocentric position diagram