FSR 1766

(MWSC 2630)

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0.23 UTI
0.0
CN
0.01
Cdens
0.5
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members) 5.0 [arcmin]
  • CN 0.0 Sparse
  • Cdens 0.01 Very loose
  • CC3 0.5 Intermediate quality
  • Clit 0.31 Poorly studied
  • Cdup 1.0 Unique

Overview

FSR 1766 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very large* distance, below the mid-plane, affected by high extinction. It is catalogued as a massive, old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~12.58 kpc) differs significantly from the median photometric distance (~3.54 kpc).

⚠️ 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 High extinction Massive Old

Data

Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 263.656 -36.707 0.08 -2.579 -5.106 -119.095
Just et al. 2023 263.631 -36.65
Bica et al. 2019 263.625 -36.653
Kharchenko et al. 2016 263.631 -36.65
Kharchenko et al. 2013 263.64 -36.65 -4.22 -1.13
Froebrich et al. 2007 263.625 -36.65

💡 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 1334 4355
Kharchenko et al. 2016 3.54 3.42 1334
Kharchenko et al. 2013 3.54 3.42 1334

💡 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.