HSC 2878
0.18
UTI
0.0
CN
0.02
Cdens
0.38
CC3
0.25
Clit
1.0
Cdup
Stellar density (N50/rad)
0.1 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.02 Very loose
- CC3 0.38 Low quality
- Clit 0.25 Poorly 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 2878 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very large* distance, above the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.
(*): The parallax distance estimate (~12.06 kpc) differs significantly from the median photometric distance (~7.67 kpc).
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 | 256.087 | -37.019 | 0.083 | -3.861 | -5.101 | 20.227 |
| Hu & Soubiran | 2025 | 256.079 | -37.035 | â | â | â | â |
| Hunt & Reffert | 2024 | 256.102 | -37.011 | 0.094 | -3.837 | -5.103 | -95.69 |
| Cavallo et al. | 2024 | 256.079 | -37.035 | 0.094 | â | â | â |
| Hunt & Reffert | 2023 | 256.102 | -37.011 | 0.094 | -3.837 | -5.103 | -95.69 |
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 | 7.675 | 4.06 | 2.41 | 2297 | -0.220 | 4280 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.410(5) | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 4280(1) | â | â |
| Cavallo et al. | 2024 | 7.01 | 3.25 | â | 3467 | -0.030 | â | â | â |
| Hunt & Reffert | 2023 | 8.34 | 4.87 | 2.41 | 1127 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.