HSC 1489
0.10
UTI
0.0
CN
0.02
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
7.4 [arcmin]
- CN 0.0 Sparse
- Cdens 0.02 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 1489 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a large* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.
(*): The parallax distance estimate (~5.78 kpc) differs significantly from the median photometric distance (~4.40 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.
Distant
Moderate extinction
Metal-poor
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 84.958 | 19.27 | 0.173 | 0.444 | -0.225 | 35.552 |
| Hu & Soubiran | 2025 | 85.015 | 19.293 | â | â | â | â |
| Cavallo et al. | 2024 | 85.015 | 19.293 | 0.188 | â | â | â |
| Hunt & Reffert | 2023 | 84.983 | 19.205 | 0.186 | 0.465 | -0.195 | 17.813 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.310* | â | â | â |
| Cavallo et al. | 2024 | 4.33 | 1.67 | â | 759 | -0.850 | â | â | â |
| Hunt & Reffert | 2023 | 4.47 | 0.53 | 1.51 | 1227 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.