HSC 1989
0.07
UTI
0.0
CN
0.09
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
146.3 [arcmin]
- CN 0.0 Sparse
- Cdens 0.09 Very loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 1989 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very 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.
Very close
Low extinction
Metal-rich
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 98.231 | -43.377 | 5.731 | 4.351 | 9.706 | 26.936 |
| Cavallo et al. | 2024 | 97.77 | -42.708 | 5.776 | â | â | â |
| Hunt & Reffert | 2023 | 94.202 | -39.629 | 5.771 | 4.421 | 9.692 | 27.442 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Cavallo et al. | 2024 | 0.18 | 0.62 | â | 60 | 0.560 | â | â | â |
| Hunt & Reffert | 2023 | 0.17 | 0.12 | 0.43 | 19 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.