UBC 273
0.58
UTI
0.45
CN
1.0
Cdens
0.75
CC3
0.35
Clit
1.0
Cdup
Stellar density (N50/rad)
10.2 [N/pc2]
- CN 0.45 Poorly 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
UBC 273 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a moderate 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 age parameter (see Parameters). It is poorly 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 | 99999â | 170.312 | -60.556 | 0.43 | -6.348 | 1.155 | â |
| Hunt & Reffert | 2024 | 170.317 | -60.565 | 0.426 | -6.339 | 1.206 | â |
| Cavallo et al. | 2024 | 170.303 | -60.563 | 0.427 | â | â | â |
| Hunt & Reffert | 2023 | 170.317 | -60.565 | 0.426 | -6.339 | 1.206 | â |
| Cantat-Gaudin et al. | 2020 | 170.302 | -60.568 | 0.428 | -6.328 | 1.131 | â |
| Castro-Ginard et al. | 2020 | 170.309 | -60.565 | 0.43 | -6.314 | 1.148 | 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 | 2.19 | 0.62 | 0.89 | 76 | 0.240 | 391 | â | â |
| Liu et al. | 2025 | 2.96 | 0.37 | â | 102 | â | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 391(1) | â | â |
| Cavallo et al. | 2024 | 1.80 | 0.51 | â | 389 | 0.240 | â | â | â |
| Hunt & Reffert | 2023 | 2.18 | 1.17 | 0.89 | 50 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.20 | 0.73 | â | 46 | â | 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 tidal capture (resonant trapping binary) 377 along with UBC_661.
Palma et al. (2025)
Classified as optical pair P74, along with UBC_661.
Cavallo et al. (2024)
Gold sample.