UBC 340
0.75
UTI
0.78
CN
1.0
Cdens
0.75
CC3
0.6
Clit
1.0
Cdup
Radius (P>50% members)
8.2 [arcmin]
- CN 0.78 Rich
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.6 Moderately studied
- Cdup 1.0 Unique
Overview
UBC 340 is a rich, 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, young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is moderately studied in the literature.
Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.
Relatively close
Moderate extinction
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 270.778 | -22.646 | 0.722 | 0.684 | -2.598 | -38.598 |
| Almeida et al. | 2025 | 270.768 | -22.654 | â | â | â | â |
| Hunt & Reffert | 2024 | 270.761 | -22.66 | 0.721 | 0.668 | -2.602 | -17.725 |
| Cavallo et al. | 2024 | 270.795 | -22.642 | 0.723 | â | â | â |
| Hunt & Reffert | 2023 | 270.761 | -22.66 | 0.721 | 0.668 | -2.602 | -17.725 |
| Almeida et al. | 2023 | 270.771 | -22.65 | â | â | â | â |
| He et al. | 2022 | 270.623 | -23.033 | 0.831 | 0.605 | -1.761 | â |
| Tarricq et al. | 2022 | 270.74 | -22.649 | 0.72 | 0.681 | -2.619 | â |
| Dias et al. | 2021 | 270.768 | -22.654 | 0.709 | 0.708 | -2.573 | â |
| Cantat-Gaudin et al. | 2020 | 270.774 | -22.649 | 0.702 | 0.723 | -2.553 | â |
| Castro-Ginard et al. | 2020 | 270.767 | -22.657 | 0.702 | 0.722 | -2.568 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Almeida et al. | 2025 | 1.39 | 2.13 | â | 129 | â | 354 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1305* | â | â |
| Cavallo et al. | 2024 | 1.16 | 2.74 | â | 65 | 0.180 | â | â | â |
| Hunt & Reffert | 2023 | 1.30 | 2.44 | 2.73 | 32 | â | â | â | â |
| Almeida et al. | 2023 | 1.26 | 2.38 | â | 26 | 0.161 | 436* | 0.60 | â |
| He et al. | 2022 | â | 2.10 | â | 8 | â | â | â | â |
| Tarricq et al. | 2022 | 1.32 | â | â | 501 | â | â | â | â |
| Dias et al. | 2021 | 1.39 | 2.13 | â | 129 | 0.237 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.39 | 1.79 | â | 427 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit. Silver sample.
Cavallo et al. (2024)
Gold sample.