HSC 1905
0.17
UTI
0.0
CN
0.22
Cdens
0.62
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
1.1 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.22 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.0 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
HSC 1905 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, young cluster (see Parameters). It was recently reported 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 | 112.503 | -23.954 | 0.806 | -3.769 | 3.99 | 40.541 |
| Hunt & Reffert | 2024 | 112.514 | -23.946 | 0.816 | -3.746 | 4.018 | 41.683 |
| Cavallo et al. | 2024 | 112.483 | -23.897 | 0.81 | â | â | â |
| Hunt & Reffert | 2023 | 112.514 | -23.946 | 0.816 | -3.746 | 4.018 | 41.683 |
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 | 1.235 | 0.265 | 0.42 | 70 | 0.340 | 46 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 46(1) | â | â |
| Cavallo et al. | 2024 | 1.31 | 0.32 | â | 74 | 0.340 | â | â | â |
| Hunt & Reffert | 2023 | 1.16 | 0.21 | 0.42 | 65 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P32, along with Ruprecht_17.
Cavallo et al. (2024)
Gold sample.