OC 0023
0.61
UTI
0.57
CN
1.0
Cdens
1.0
CC3
0.25
Clit
1.0
Cdup
Stellar density (N50/rad)
54.3 [N/pc2]
- CN 0.57 Moderately populated
- Cdens 1.0 Very dense
- CC3 1.0 Very high 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
OC 0023 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.
Note: This object shares a large 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 | 273.762 | -17.013 | 0.348 | 1.193 | -1.056 | 14.124 |
| Hunt & Reffert | 2024 | 273.763 | -17.012 | 0.332 | 1.217 | -1.062 | 19.232 |
| Cavallo et al. | 2024 | 273.758 | -17.016 | 0.336 | â | â | â |
| Hunt & Reffert | 2023 | 273.763 | -17.012 | 0.332 | 1.217 | -1.062 | 19.232 |
| Hao et al. | 2022 | 273.758 | -17.015 | 0.346 | 1.209 | -1.042 | 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 | 2.715 | 4.75 | 2.67 | 331 | 0.271 | 2616 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 2616(1) | â | â |
| Cavallo et al. | 2024 | 2.75 | 4.50 | â | 331 | -0.070 | â | â | â |
| Hunt & Reffert | 2023 | 2.68 | 4.75 | 2.67 | 385 | â | â | â | â |
| Hao et al. | 2022 | â | 4.85 | â | 316 | 0.611 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P556, along with Theia_1756.
Cavallo et al. (2024)
Silver sample.