HSC 2015
0.22
UTI
0.38
CN
0.11
Cdens
0.5
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
38
Core radius and density
2.5 [pc], 0.6 [pc-2]
- CN 0.38 Poorly populated
- Cdens 0.11 Very loose
- CC3 0.5 Intermediate 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 2015 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a metal-rich, 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 | 118.4 | -34.94 | 1.345 | -6.485 | 4.996 | 14.351 |
| Hunt & Reffert | 2024 | 118.349 | -35.024 | 1.351 | -6.511 | 5.025 | 17.09 |
| Cavallo et al. | 2024 | 118.596 | -35.275 | 1.355 | â | â | â |
| Hunt & Reffert | 2023 | 118.349 | -35.024 | 1.351 | -6.511 | 5.025 | 17.09 |
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 | 0.76 | 0.265 | 0.78 | 86 | 0.690 | 51 | â | â |
| Liu et al. | 2025 | 0.87 | 0.15 | â | 91 | â | â | â | â |
| Hunt & Reffert | 2024 | 0.71 | 0.38 | 0.78 | 80 | â | 51(1) | â | â |
| Cavallo et al. | 2024 | 0.81 | 0.14 | â | 98 | 0.690 | â | â | â |
| Hunt & Reffert | 2023 | 0.71 | 0.38 | 0.78 | 80 | 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 primordial binary cluster 215 along with UPK_492.
Palma et al. (2025)
Classified as optical pair P453, along with UPK_492.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).