FoF 1817
(LP 1817)
0.12
UTI
0.0
CN
0.11
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
5.1 [arcmin]
- CN 0.0 Sparse
- Cdens 0.11 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
FoF 1817 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is rarely studied in the literature.
Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.
â ī¸ 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
Near-solar metallicity
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 342.357 | 60.458 | 0.251 | -2.949 | -1.819 | 6.492 |
| Almeida et al. | 2025 | 342.269 | 60.47 | â | â | â | â |
| He et al. | 2023 | 342.646 | 60.427 | 0.26 | -2.925 | -1.808 | 6.49 |
| Dias et al. | 2021 | 342.269 | 60.47 | 0.249 | -2.931 | -1.821 | -80.237 |
đĄ 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 | 3.54 | 3.07 | â | 7 | â | 954 | â | â |
| He et al. | 2023 | 3.24 | 3.90 | â | 79 | â | â | â | â |
| Dias et al. | 2021 | 3.54 | 3.07 | â | 7 | 0.044 | â | â | â |
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit.