HSC 1998
0.21
UTI
0.31
CN
0.25
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
92.8 [arcmin]
- CN 0.31 Poorly populated
- Cdens 0.25 Loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 1998 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 100.994 | -35.547 | 5.419 | -13.909 | 10.392 | 14.435 |
| Cavallo et al. | 2024 | 101.505 | -36.255 | 5.53 | â | â | â |
| Hunt & Reffert | 2023 | 103.027 | -38.488 | 5.545 | -14.472 | 10.67 | 21.694 |
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 | 0.66 | â | 21 | -0.220 | â | â | â |
| Hunt & Reffert | 2023 | 0.18 | 0.09 | 0.56 | 59 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.