HSC 2928
0.20
UTI
0.0
CN
0.1
Cdens
0.75
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
20
Core radius and density
2.9 [pc], 0.5 [pc-2]
- CN 0.0 Sparse
- Cdens 0.1 Very loose
- CC3 0.75 High quality
- Clit 0.06 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 2928 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (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 | 265.891 | -35.747 | 0.809 | -0.627 | -1.762 | â |
| Hunt & Reffert | 2024 | 265.798 | -35.743 | 0.825 | -0.586 | -1.767 | â |
| Cavallo et al. | 2024 | 265.868 | -35.763 | 0.825 | â | â | â |
| Hunt & Reffert | 2023 | 265.798 | -35.743 | 0.825 | -0.586 | -1.767 | 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 | 1.14 | 1.41 | 1.1 | 28 | -0.280 | 204 | â | â |
| Liu et al. | 2025 | 1.75 | 0.46 | â | 32 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.14 | 1.41 | 1.10 | 27 | â | 204(1) | â | â |
| Cavallo et al. | 2024 | 1.08 | 1.74 | â | 30 | -0.280 | â | â | â |
| Hunt & Reffert | 2023 | 1.14 | 1.41 | 1.10 | 27 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 255 along with NGC_6400.
Palma et al. (2025)
Classified as optical pair P494, along with NGC_6400.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 1.00 (50th percentile), true positive (human-assigned).
Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 1.00 (50th percentile), true positive (human-assigned).