Ferrero 17
0.18
UTI
0.0
CN
0.19
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
1.8 [pc], 0.9 [pc-2]
- CN 0.0 Sparse
- Cdens 0.19 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.1 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
Ferrero 17 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, well below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is rarely studied in the literature.
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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 77.194 | 17.982 | 0.193 | 0.99 | -0.638 | 22.971 |
| Hu & Soubiran | 2025 | 77.198 | 17.957 | â | â | â | â |
| Hunt & Reffert | 2024 | 77.186 | 17.987 | 0.187 | 1.031 | -0.659 | â |
| Cavallo et al. | 2024 | 77.198 | 17.957 | 0.187 | â | â | â |
| Hunt & Reffert | 2023 | 77.186 | 17.987 | 0.187 | 1.031 | -0.659 | â |
| Bica et al. | 2019 | 77.183 | 17.987 | â | â | â | â |
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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 4.62 | 0.4 | 1.13 | 2998 | -0.345 | 283 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.470(5) | â | â | â |
| Hunt & Reffert | 2024 | 4.62 | 0.40 | 1.13 | 2998 | â | 283(1) | â | â |
| Cavallo et al. | 2024 | 4.31 | 1.45 | â | 1698 | -0.220 | â | â | â |
| Hunt & Reffert | 2023 | 4.63 | 0.40 | 1.13 | 2999 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.26 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.26 (50th percentile).
Bica et al. (2019)
Asterisms reported by amateur astronomers in the web. Asterisms and clusters by L. Ferrero.