UBC 173
0.62
UTI
0.78
CN
1.0
Cdens
1.0
CC3
0.16
Clit
1.0
Cdup
Stellar density (N50/rad)
5.0 [N/pc2]
- CN 0.78 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.16 Rarely 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 173 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 341.725 | 56.395 | 0.282 | -3.363 | -2.781 | -72.139 |
| Hunt & Reffert | 2024 | 341.707 | 56.404 | 0.291 | -3.446 | -2.789 | -81.341 |
| Celli et al. | 2024 | 341.704 | 56.408 | â | â | â | â |
| Cavallo et al. | 2024 | 341.718 | 56.414 | 0.291 | â | â | â |
| Hunt & Reffert | 2023 | 341.707 | 56.404 | 0.291 | -3.446 | -2.789 | -81.341 |
| Cantat-Gaudin et al. | 2020 | 341.704 | 56.408 | 0.265 | -3.405 | -2.739 | â |
| Castro-Ginard et al. | 2020 | 341.695 | 56.453 | 0.269 | -3.437 | -2.735 | 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 | 3.36 | 1.84 | 1.95 | 14 | 0.390 | 1918 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1813(1) | â | â |
| Celli et al. | 2024 | â | â | â | 13 | â | 2024 | â | â |
| Cavallo et al. | 2024 | 2.99 | 1.80 | â | 69 | 0.390 | â | â | â |
| Hunt & Reffert | 2023 | 3.18 | 1.88 | 1.95 | 40 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 3.60 | 1.55 | â | 13 | â | â | â | â |
| Kounkel et al. | 2020 | 3.54 | 2.00 | â | 14 | â | 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 tidal capture (resonant trapping pair) P73, along with UBC_1170.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).