HSC 1553
0.10
UTI
0.83
CN
0.26
Cdens
0.75
CC3
0.16
Clit
0.24
Cdup
Nm (P>50%)
306
Core radius and density
6.6 [pc], 1.3 [pc-2]
- CN 0.83 Rich
- Cdens 0.26 Loose
- CC3 0.75 High quality
- Clit 0.16 Rarely studied
- Cdup 0.24 Likely duplicate
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 1553 is a rich, loose object of high 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: This is likely a duplicate object, which shares a large 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 | 92.79 | 14.337 | 4.627 | 5.645 | -16.52 | 22.097 |
| Liu et al. | 2025 | 93.01 | 13.98 | 4.62 | 5.63 | -16.33 | 21.32 |
| Yang et al. | 2025 | 93.013 | 13.982 | â | â | â | â |
| Zhang et al. | 2024 | 93.013 | 13.982 | â | â | â | â |
| Swiggum et al. | 2024 | 93.013 | 13.982 | 4.62 | 5.63 | -16.33 | 22.068 |
| Hunt & Reffert | 2024 | 93.013 | 13.982 | 4.62 | 5.63 | -16.33 | 21.319 |
| Cavallo et al. | 2024 | 92.423 | 14.753 | 4.637 | â | â | â |
| Hunt & Reffert | 2023 | 93.013 | 13.982 | 4.62 | 5.63 | -16.33 | 21.319 |
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 | 0.22 | 0.055 | 0.61 | 38 | -0.040 | 180 | â | â |
| Liu et al. | 2025 | 0.23 | 0.06 | â | 44 | â | â | â | â |
| Yang et al. | 2025 | â | â | â | 39 | -0.080(3) | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.020(1) | â | â | â |
| Swiggum et al. | 2024 | 0.21 | â | â | 38 | â | 293 | â | â |
| Hunt & Reffert | 2024 | 0.22 | 0.05 | 0.61 | 38 | â | 66(1) | â | â |
| Cavallo et al. | 2024 | 0.21 | 0.56 | â | 28 | -0.040 | â | â | â |
| Hunt & Reffert | 2023 | 0.22 | 0.04 | 0.61 | 38 | 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) 198 along with Theia_792, and as primordial binary cluster 332 along with Platais_6, and of multiple system 55 along with Theia_792 and Platais_6.
Palma et al. (2025)
Part of multiple system G121, along with Platais_6 and Theia_792.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.90 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.90 (50th percentile).