FSR 1658

(MWSC 2181)

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0.17 UTI
0.0
CN
0.12
Cdens
0.12
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members) 4.7 [arcmin]
  • CN 0.0 Sparse
  • Cdens 0.12 Very loose
  • CC3 0.12 Very low quality
  • Clit 0.31 Poorly studied
  • Cdup 1.0 Unique

Overview

FSR 1658 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate distance, well below the mid-plane, affected by moderate extinction. It is catalogued as a massive, old cluster (see Parameters). It is poorly studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Massive Old

Data

Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 208.776 -70.674 0.257 -8.103 -2.062 -11.069
Just et al. 2023 208.748 -70.748
Bica et al. 2019 208.791 -70.76
Kharchenko et al. 2016 208.748 -70.748
Kharchenko et al. 2013 208.762 -70.75 -10.39 -0.99
Froebrich et al. 2007 208.779 -70.758

💡 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
Just et al. 2023 3548 3873
Kharchenko et al. 2016 4.24 1.10 3548
Kharchenko et al. 2013 4.24 1.10 3548

💡 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.

Visualization

Galactocentric position diagram

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