HSC 2643
0.13
UTI
0.25
CN
0.14
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.7 [N/pc2]
- CN 0.25 Poorly populated
- Cdens 0.14 Very loose
- CC3 0.25 Low quality
- Clit 0.0 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 2643 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (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 | 305.628 | -81.005 | 3.98 | 8.752 | -11.739 | 24.514 |
| Cavallo et al. | 2024 | 306.585 | -80.959 | 4.028 | â | â | â |
| Hunt & Reffert | 2023 | 301.484 | -80.997 | 4.034 | 9.033 | -11.729 | 26.346 |
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 | 0.265 | 0.715 | 0.46 | 163 | -0.060 | â | â | â |
| Cavallo et al. | 2024 | 0.28 | 1.00 | â | 62 | -0.060 | â | â | â |
| Hunt & Reffert | 2023 | 0.25 | 0.43 | 0.46 | 264 | â | â | â | â |
Palma et al. (2025)
Classified as optical pair P145, along with HSC_2638.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as a moving group.