HSC 2156
0.14
UTI
0.31
CN
0.16
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.8 [N/pc2]
- CN 0.31 Poorly populated
- Cdens 0.16 Very loose
- CC3 0.25 Low quality
- Clit 0.0 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 2156 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 near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (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 | 124.958 | -50.803 | 5.65 | -19.221 | 20.887 | 14.598 |
| Cavallo et al. | 2024 | 125.959 | -50.563 | 5.628 | â | â | â |
| Hunt & Reffert | 2023 | 125.842 | -50.704 | 5.617 | -18.986 | 20.597 | 22.57 |
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 | 0.18 | 0.21 | 0.57 | 39 | 0.090 | â | â | â |
| Liu et al. | 2025 | 0.18 | 0.03 | â | 39 | â | â | â | â |
| Cavallo et al. | 2024 | 0.18 | 0.92 | â | 56 | 0.090 | â | â | â |
| Hunt & Reffert | 2023 | 0.18 | 0.21 | 0.57 | 19 | â | â | â | â |
Liu et al. (2025)
Classified as hyperbolic encounter pair 98 along with CWNU_1144.
Palma et al. (2025)
Part of multiple system G138, along with HSC_2068, HSC_2139 and Platais_9.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as a moving group.