OC 0343
0.60
UTI
0.56
CN
1.0
Cdens
0.75
CC3
0.35
Clit
1.0
Cdup
Stellar density (N50/rad)
9.4 [N/pc2]
- CN 0.56 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.35 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 0343 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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 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 | 97.69 | 4.446 | 1.533 | -1.746 | -4.753 | 11.228 |
| Zhang et al. | 2024 | 97.632 | 4.357 | â | â | â | â |
| Hunt & Reffert | 2024 | 97.632 | 4.357 | 1.524 | -1.759 | -4.714 | 11.01 |
| Cavallo et al. | 2024 | 97.795 | 4.426 | 1.517 | â | â | â |
| Hunt & Reffert | 2023 | 97.632 | 4.357 | 1.524 | -1.759 | -4.714 | 11.01 |
| Hao et al. | 2022 | 97.688 | 4.443 | 1.566 | -1.7 | -4.634 | 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 | 0.7 | 0.295 | 0.57 | 33 | 0.060 | 110 | â | â |
| Liu et al. | 2025 | 0.74 | 0.09 | â | 35 | â | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.139(1) | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 110(1) | â | â |
| Cavallo et al. | 2024 | 0.70 | 0.44 | â | 17 | 0.060 | â | â | â |
| Hunt & Reffert | 2023 | 0.63 | 0.15 | 0.57 | 31 | â | â | â | â |
| Hao et al. | 2022 | â | 1.37 | â | 50 | 0.611 | 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 307 along with Theia_558.
Palma et al. (2025)
Classified as optical pair P559, along with Theia_558.
Cavallo et al. (2024)
Gold sample.