UPK 549
- CN 0.8 Rich
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.62 Moderately studied
- Cdup 1.0 Unique
Overview
UPK 549 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is moderately studied in the literature. Note: This object shares a large percentage of members with 2 later reported entries. 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 | – | 146.464 | -52.49 | 0.978 | -1.65 | -0.413 | -4.495 |
| Hu & Soubiran | 2025 | 146.483 | -52.477 | – | – | – | – |
| Almeida et al. | 2025 | 146.496 | -52.483 | – | – | – | – |
| Hunt & Reffert | 2024 | 146.483 | -52.482 | 0.973 | -1.649 | -0.42 | -5.823 |
| Cavallo et al. | 2024 | 146.483 | -52.477 | 0.972 | – | – | – |
| Hunt & Reffert | 2023 | 146.483 | -52.482 | 0.973 | -1.649 | -0.42 | -5.823 |
| He et al. | 2022 | 146.482 | -52.481 | 0.978 | -1.661 | -0.409 | – |
| Tarricq et al. | 2022 | 146.5 | -52.49 | 0.981 | -1.663 | -0.408 | – |
| Dias et al. | 2021 | 146.496 | -52.483 | 0.964 | -1.663 | -0.447 | -4.075 |
| Cantat-Gaudin et al. | 2020 | 146.49 | -52.49 | 0.96 | -1.676 | -0.439 | – |
| Sim et al. | 2019 | 146.503 | -52.497 | – | -1.69 | -0.43 | – |
💡 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 |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | – | – | – | – | -0.010* | – | – | – |
| Almeida et al. | 2025 | 1.00 | 1.36 | – | 975 | – | 488 | – | – |
| Hunt & Reffert | 2024 | – | – | – | – | – | 778* | – | – |
| Cavallo et al. | 2024 | 0.99 | 1.42 | – | 776 | 0.170 | – | – | – |
| Hunt & Reffert | 2023 | 0.99 | 1.43 | 1.65 | 368 | – | – | – | – |
| He et al. | 2022 | – | 1.50 | – | 794 | – | – | – | – |
| Tarricq et al. | 2022 | 0.99 | – | – | 977 | – | – | – | – |
| Dias et al. | 2021 | 1.00 | 1.36 | – | 975 | 0.123 | – | – | – |
| Cantat-Gaudin et al. | 2020 | 1.01 | 0.80 | – | 933 | – | – | – | – |
| Sim et al. | 2019 | 1.01 | – | – | 1122 | – | – | – | – |
💡 Note: The parameters are sometimes
transformed from their original values to match the format of the
columns shown here, see FAQ.
The columns DAv, Bfr, BSS correspond to differential
extinction, binary fraction, and blue stragglers, respectively.
BSS values can be listed as fractions or integers.
(*): indicates that this parameter is
assigned more than one value in the corresponding reference.
