HSC 2523
0.20
UTI
0.0
CN
0.49
Cdens
0.75
CC3
0.06
Clit
0.72
Cdup
Nm (P>50%)
24
Core radius and density
0.8 [pc], 2.5 [pc-2]
- CN 0.0 Sparse
- Cdens 0.49 Loose
- CC3 0.75 High quality
- Clit 0.06 Rarely studied
- Cdup 0.72 Likely 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 2523 is a sparse, loose object of high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It was recently reported in the literature.
Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 187.321 | -72.919 | 9.841 | -39.683 | -10.808 | 12.789 |
| Liu et al. | 2025 | 187.54 | -72.94 | 9.85 | -39.79 | -10.53 | 11.55 |
| Swiggum et al. | 2024 | 187.535 | -72.94 | 9.848 | -39.79 | -10.534 | 13.737 |
| Cavallo et al. | 2024 | 186.982 | -72.98 | 9.842 | â | â | â |
| Hunt & Reffert | 2023 | 187.535 | -72.94 | 9.848 | -39.79 | -10.534 | 11.552 |
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 | 0.105 | 1.15 | 0.95 | 14 | -0.240 | 23 | â | â |
| Liu et al. | 2025 | 0.12 | 0.25 | â | 21 | â | â | â | â |
| Swiggum et al. | 2024 | 0.10 | â | â | 7 | â | 23 | â | â |
| Cavallo et al. | 2024 | 0.11 | 1.68 | â | 35 | -0.240 | â | â | â |
| Hunt & Reffert | 2023 | 0.10 | 1.15 | 0.95 | 7 | â | â | â | â |
Liu et al. (2025)
Classified as primordial binary cluster 233 along with HSC_2505, and as primordial binary cluster 234 along with HSC_2515, and of multiple system 67 along with HSC_2468, HSC_2505 and HSC_2515.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P474, along with HSC_2515.
Cavallo et al. (2024)
Bronze sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).