HSC 2733
0.03
UTI
0.75
CN
0.49
Cdens
1.0
CC3
0.13
Clit
0.06
Cdup
Nm (P>50%)
105
Core radius and density
2.0 [pc], 2.4 [pc-2]
- CN 0.75 Rich
- Cdens 0.49 Loose
- CC3 1.0 Very high quality
- Clit 0.13 Rarely studied
- Cdup 0.06 Very 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 2733 is a rich, loose object of very high C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by low extinction. It is catalogued as a 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.
â ī¸ Warning: This is very 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 | 227.975 | -44.303 | 6.843 | -20.592 | -21.945 | 5.34 |
| Yan et al. | 2026 | 228.065 | -44.529 | 6.849 | -20.667 | -21.892 | â |
| Liu et al. | 2025 | 228.06 | -44.53 | 6.85 | -20.67 | -21.89 | 2.66 |
| Swiggum et al. | 2024 | 228.065 | -44.529 | 6.849 | -20.667 | -21.892 | 5.72 |
| Hunt & Reffert | 2024 | 228.065 | -44.529 | 6.849 | -20.667 | -21.892 | 2.664 |
| Cavallo et al. | 2024 | 227.786 | -43.966 | 6.849 | â | â | â |
| Hunt & Reffert | 2023 | 228.065 | -44.529 | 6.849 | -20.667 | -21.892 | 2.664 |
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 | 0.14 | 0.14 | 0.4 | 14 | 0.100 | 78 | â | â |
| Yan et al. | 2026 | â | â | â | 17 | â | â | â | â |
| Liu et al. | 2025 | 0.14 | 0.03 | â | 25 | â | â | â | â |
| Swiggum et al. | 2024 | 0.14 | â | â | 10 | â | 116 | â | â |
| Hunt & Reffert | 2024 | 0.14 | 0.14 | 0.40 | 10 | â | 40(1) | â | â |
| Cavallo et al. | 2024 | 0.14 | 0.66 | â | 19 | 0.100 | â | â | â |
| Hunt & Reffert | 2023 | 0.14 | 0.14 | 0.40 | 10 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Yan et al. (2026)
Number of WDs: expected from single-star evolution N=0, with probability of formation through binary evolution >=0.5 N=3.
Liu et al. (2025)
Classified as primordial binary cluster 243 along with OCSN_91, and as primordial binary cluster 398 along with UPK_606, and of multiple system 70 along with HSC_2630, HSC_2636, UPK_606, HSC_2816, OCSN_92 and OCSN_91.
Palma et al. (2025)
Part of multiple system G232, along with OCSN_92, OCSN_91 and HSC_2816.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).