HSC 644
0.20
UTI
0.34
CN
0.14
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
6.6 [arcmin]
- CN 0.34 Poorly populated
- Cdens 0.14 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 644 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a metal-rich, very young cluster (see Parameters). It was recently reported in the literature.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
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
Metal-rich
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 310.454 | 43.428 | 0.275 | -2.454 | -4.192 | -44.139 |
| Hunt & Reffert | 2024 | 310.462 | 43.399 | 0.296 | -2.459 | -4.198 | â |
| Cavallo et al. | 2024 | 310.449 | 43.453 | 0.288 | â | â | â |
| Hunt & Reffert | 2023 | 310.462 | 43.399 | 0.296 | -2.459 | -4.198 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hunt & Reffert | 2024 | â | â | â | â | â | 799* | â | â |
| Cavallo et al. | 2024 | 3.21 | 4.43 | â | 20 | 0.730 | â | â | â |
| Hunt & Reffert | 2023 | 3.16 | 5.48 | 2.48 | 7 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Wood sample.