HSC 135
0.31
UTI
0.43
CN
0.26
Cdens
0.75
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
43
Core radius and density
1.5 [pc], 1.3 [pc-2]
- CN 0.43 Poorly populated
- Cdens 0.26 Loose
- CC3 0.75 High quality
- Clit 0.06 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 135 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 271.75 | -19.785 | 0.751 | 2.778 | -0.859 | -29.612 |
| Liu et al. | 2025 | 271.74 | -19.76 | 0.74 | 2.78 | -0.83 | -21.73 |
| Hunt & Reffert | 2024 | 271.739 | -19.764 | 0.743 | 2.781 | -0.826 | -21.73 |
| Cavallo et al. | 2024 | 271.775 | -19.765 | 0.743 | â | â | â |
| Hunt & Reffert | 2023 | 271.739 | -19.764 | 0.743 | 2.781 | -0.826 | -21.73 |
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 | 1.28 | 1.3 | 2.28 | 91 | -0.240 | 217 | â | â |
| Liu et al. | 2025 | 2.82 | 0.61 | â | 56 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.28 | 1.35 | 2.28 | 91 | â | 217(1) | â | â |
| Cavallo et al. | 2024 | 1.14 | 1.25 | â | 457 | -0.240 | â | â | â |
| Hunt & Reffert | 2023 | 1.28 | 1.35 | 2.28 | 91 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 160 along with CWNU_1630, and of multiple system 39 along with HSC_143 and CWNU_1630.
Palma et al. (2025)
Part of multiple system G70, along with HSC_143, Dias_5 and CWNU_1630.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.74 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.74 (50th percentile).