FSR 1689
(MWSC 2254)
0.41
UTI
0.43
CN
0.39
Cdens
0.62
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members)
4.4 [arcmin]
- CN 0.43 Poorly populated
- Cdens 0.39 Loose
- CC3 0.62 Intermediate quality
- Clit 0.31 Poorly studied
- Cdup 1.0 Unique
Overview
FSR 1689 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a moderate* distance, near the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.
(*): The parallax distance estimate (~3.66 kpc) differs significantly from the median photometric distance (~2.28 kpc).
Relatively close
Moderate extinction
Old
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | – | 221.752 | -59.479 | 0.273 | -6.33 | -3.925 | -36.232 |
| Just et al. | 2023 | 221.711 | -59.485 | – | – | – | – |
| Bica et al. | 2019 | 221.703 | -59.488 | – | – | – | – |
| Kharchenko et al. | 2016 | 221.711 | -59.485 | – | – | – | – |
| Kharchenko et al. | 2013 | 221.722 | -59.487 | – | -6.01 | 5.78 | – |
| Froebrich et al. | 2007 | 221.708 | -59.487 | – | – | – | – |
💡 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 | – | – | – | 1884 | – | 232 | – | – |
| Kharchenko et al. | 2016 | 2.28 | 2.58 | – | 1884 | – | – | – | – |
| Kharchenko et al. | 2013 | 2.28 | 2.58 | – | 1884 | – | – | – | – |
💡 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.
