HSC 1900
0.16
UTI
0.3
CN
0.08
Cdens
0.38
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
30
Core radius and density
3.7 [pc], 0.4 [pc-2]
- CN 0.3 Poorly populated
- Cdens 0.08 Very loose
- CC3 0.38 Low quality
- Clit 0.03 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
HSC 1900 is a poorly populated, 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 low-mass, 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 82.353 | -32.018 | 16.371 | 28.429 | -0.332 | 23.592 |
| Swiggum et al. | 2024 | 81.203 | -33.863 | 16.993 | 29.062 | -0.126 | 24.196 |
| 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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 0.06 | 0.285 | 0.52 | 27 | 0.190 | 17 | â | â |
| Swiggum et al. | 2024 | 0.06 | â | â | 27 | â | 17 | â | â |
| 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 moving group. CMD class: 0.97 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).