HSC 655
0.08
UTI
0.0
CN
0.04
Cdens
0.25
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
16
Core radius and density
2.6 [pc], 0.2 [pc-2]
- CN 0.0 Sparse
- Cdens 0.04 Very loose
- CC3 0.25 Low 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 655 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large* distance, above the mid-plane, affected by high extinction. It is catalogued as an extremely massive, near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.
(*): The parallax distance estimate (~5.50 kpc) differs significantly from the median photometric distance (~3.76 kpc).
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 | 309.382 | 45.205 | 0.182 | -2.688 | -3.805 | -40.861 |
| Zhang et al. | 2024 | 309.39 | 45.19 | â | â | â | â |
| Hunt & Reffert | 2024 | 309.39 | 45.19 | 0.202 | -2.658 | -3.804 | -52.374 |
| Cavallo et al. | 2024 | 309.26 | 45.196 | 0.207 | â | â | â |
| Hunt & Reffert | 2023 | 309.39 | 45.19 | 0.202 | -2.658 | -3.804 | -52.374 |
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 | 3.76 | 3.66 | 3.17 | 345 | 0.049 | 23328 | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.013(1) | â | â | â |
| Hunt & Reffert | 2024 | 3.76 | 3.66 | 3.17 | 345 | â | 23328(1) | â | â |
| Cavallo et al. | 2024 | 6.70 | 3.68 | â | 151 | 0.110 | â | â | â |
| Hunt & Reffert | 2023 | 3.76 | 3.66 | 3.17 | 345 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Wood sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.09 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.09 (50th percentile).