OC 0028
0.58
UTI
0.57
CN
1.0
Cdens
0.75
CC3
0.3
Clit
1.0
Cdup
Stellar density (N50/rad)
18.6 [N/pc2]
- CN 0.57 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.3 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
OC 0028 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is poorly studied in the literature.
Note: This object shares a significant percentage of members with a later 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 | 274.639 | -15.187 | 0.58 | -0.519 | -0.895 | -16.187 |
| Liu et al. | 2025 | 274.64 | -15.17 | 0.58 | -0.5 | -0.89 | -17.9 |
| Hunt & Reffert | 2024 | 274.64 | -15.174 | 0.584 | -0.505 | -0.887 | -17.902 |
| Cavallo et al. | 2024 | 274.539 | -15.299 | 0.585 | â | â | â |
| Hunt & Reffert | 2023 | 274.64 | -15.174 | 0.584 | -0.505 | -0.887 | -17.902 |
| Hao et al. | 2022 | 274.644 | -15.187 | 0.569 | -0.532 | -0.889 | -6.798 |
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 | 1.61 | 2.095 | 2.74 | 14 | 0.344 | 676 | â | â |
| Liu et al. | 2025 | 3.36 | 0.62 | â | 15 | â | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 676(1) | â | â |
| Cavallo et al. | 2024 | 1.53 | 2.24 | â | 18 | 0.150 | â | â | â |
| Hunt & Reffert | 2023 | 1.61 | 1.95 | 2.74 | 13 | â | â | â | â |
| Hao et al. | 2022 | â | 4.20 | â | 13 | 0.537 | 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 299 along with HXHWL_66, and of multiple system 47 along with HXHWL_66 and HSC_187.
Palma et al. (2025)
Part of multiple system G132, along with HXHWL_66, HSC_187 and HSC_184.
Cavallo et al. (2024)
Silver sample.