HSC 2039
0.22
UTI
0.0
CN
0.11
Cdens
0.75
CC3
0.12
Clit
1.0
Cdup
Nm (P>50%)
23
Core radius and density
2.9 [pc], 0.6 [pc-2]
- CN 0.0 Sparse
- Cdens 0.11 Very loose
- CC3 0.75 High quality
- Clit 0.12 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 2039 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It was recently reported in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 123.566 | -36.143 | 0.693 | -4.628 | 5.139 | â |
| Hunt & Reffert | 2024 | 123.465 | -36.139 | 0.703 | -4.615 | 5.153 | â |
| Cavallo et al. | 2024 | 123.684 | -36.151 | 0.702 | â | â | â |
| Hunt & Reffert | 2023 | 123.465 | -36.139 | 0.703 | -4.615 | 5.153 | â |
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 | 1.48 | 0.6 | 1.07 | 6 | -0.240 | 80 | â | â |
| Liu et al. | 2025 | 1.80 | 0.25 | â | 6 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.33 | 0.60 | 1.07 | 7 | â | 80(1) | â | â |
| Cavallo et al. | 2024 | 1.63 | 0.88 | â | 5 | -0.240 | â | â | â |
| Hunt & Reffert | 2023 | 1.33 | 0.60 | 1.07 | 7 | 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 primordial binary cluster 156 along with Gulliver_2.
Palma et al. (2025)
Classified as optical pair P456, along with HSC_2030.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).