HSC 2636
0.09
UTI
0.82
CN
0.55
Cdens
1.0
CC3
0.13
Clit
0.17
Cdup
Nm (P>50%)
285
Core radius and density
2.2 [pc], 2.7 [pc-2]
- CN 0.82 Rich
- Cdens 0.55 Moderately dense
- CC3 1.0 Very high quality
- Clit 0.13 Rarely studied
- Cdup 0.17 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 2636 is a rich, moderately dense 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 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 | 205.85 | -44.769 | 7.479 | -26.275 | -19.381 | 7.744 |
| Yan et al. | 2026 | 204.889 | -44.482 | 7.472 | -25.972 | -19.412 | â |
| Liu et al. | 2025 | 204.89 | -44.48 | 7.47 | -25.97 | -19.41 | 3.85 |
| Swiggum et al. | 2024 | 204.889 | -44.482 | 7.472 | -25.972 | -19.412 | 7.695 |
| Hunt & Reffert | 2024 | 204.889 | -44.482 | 7.472 | -25.972 | -19.412 | 3.848 |
| Cavallo et al. | 2024 | 206.091 | -44.743 | 7.452 | â | â | â |
| Hunt & Reffert | 2023 | 204.889 | -44.482 | 7.472 | -25.972 | -19.412 | 3.848 |
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 | 0.13 | 0.3 | 0.6 | 12 | 0.110 | 126 | â | â |
| Yan et al. | 2026 | â | â | â | 13 | â | â | â | â |
| Liu et al. | 2025 | 0.13 | 0.03 | â | 21 | â | â | â | â |
| Swiggum et al. | 2024 | 0.13 | â | â | 10 | â | 210 | â | â |
| Hunt & Reffert | 2024 | 0.13 | 0.30 | 0.60 | 10 | â | 43(1) | â | â |
| Cavallo et al. | 2024 | 0.13 | 0.75 | â | 23 | 0.110 | â | â | â |
| Hunt & Reffert | 2023 | 0.13 | 0.30 | 0.60 | 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=9.
Liu et al. (2025)
Classified as primordial binary cluster 241 along with UPK_606, and of multiple system 70 along with HSC_2630, UPK_606, HSC_2816, HSC_2733, OCSN_92 and OCSN_91.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P480, along with HSC_2690.
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).