HSC 1900
0.23
UTI
0.3
CN
0.45
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
204.9 [arcmin]
- CN 0.3 Poorly populated
- Cdens 0.45 Loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 1900 is a poorly populated, 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 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 | 82.353 | -32.018 | 16.371 | 28.429 | -0.332 | 23.592 |
| Cavallo et al. | 2024 | 81.347 | -30.424 | 16.857 | â | â | â |
| Hunt & Reffert | 2023 | 81.203 | -33.863 | 16.993 | 29.062 | -0.126 | 24.644 |
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 | 0.06 | 0.47 | â | 47 | 0.190 | â | â | â |
| Hunt & Reffert | 2023 | 0.06 | 0.10 | 0.52 | 27 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.