HSC 550
0.11
UTI
0.0
CN
0.03
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
5.6 [arcmin]
- CN 0.0 Sparse
- Cdens 0.03 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 550 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age 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.
Distant
High extinction
Massive
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 302.183 | 30.737 | 0.174 | -2.793 | -4.616 | -24.91 |
| Hunt & Reffert | 2024 | 302.155 | 30.755 | 0.184 | -2.772 | -4.611 | -24.936 |
| Cavallo et al. | 2024 | 302.188 | 30.723 | 0.191 | â | â | â |
| Hunt & Reffert | 2023 | 302.155 | 30.755 | 0.184 | -2.772 | -4.611 | -24.936 |
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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hunt & Reffert | 2024 | â | â | â | â | â | 1279* | â | â |
| Cavallo et al. | 2024 | 5.35 | 4.85 | â | 81 | 0.090 | â | â | â |
| Hunt & Reffert | 2023 | 4.64 | 4.91 | 2.44 | 429 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Wood sample.