UBC 220
0.58
UTI
0.6
CN
1.0
Cdens
0.38
CC3
0.45
Clit
1.0
Cdup
Stellar density (N50/rad)
6.4 [N/pc2]
- CN 0.6 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.38 Low quality
- Clit 0.45 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 220 is a moderately populated, very dense object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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 | 110.655 | -17.173 | 0.315 | -1.366 | 1.476 | 65.495 |
| Li et al. | 2025 | 110.65 | -17.174 | 0.33 | -1.322 | 1.453 | â |
| Almeida et al. | 2025 | 110.641 | -17.167 | â | â | â | â |
| Hunt & Reffert | 2024 | 110.662 | -17.159 | 0.307 | -1.374 | 1.5 | 65.454 |
| Cavallo et al. | 2024 | 110.667 | -17.172 | 0.306 | â | â | â |
| Hunt & Reffert | 2023 | 110.662 | -17.159 | 0.307 | -1.374 | 1.5 | 65.454 |
| Dias et al. | 2021 | 110.641 | -17.167 | 0.335 | -1.315 | 1.447 | â |
| Cantat-Gaudin et al. | 2020 | 110.65 | -17.174 | 0.33 | -1.322 | 1.453 | â |
| Castro-Ginard et al. | 2020 | 110.643 | -17.177 | 0.335 | -1.307 | 1.447 | 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 | 2.695 | 1.83 | 0.91 | 253 | -0.136 | 530 | â | â |
| Li et al. | 2025 | 2.60 | 1.91 | â | 242 | -0.234 | â | â | â |
| Almeida et al. | 2025 | 2.60 | 1.83 | â | 264 | â | 531 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 529(1) | â | â |
| Cavallo et al. | 2024 | 2.82 | 1.86 | â | 219 | 0.090 | â | â | â |
| Hunt & Reffert | 2023 | 2.79 | 1.64 | 0.91 | 228 | â | â | â | â |
| Dias et al. | 2021 | 2.60 | 1.83 | â | 264 | -0.136 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 3.16 | 1.47 | â | 316 | 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 optical pair (not dynamically associated) P121, along with Haffner_9.
Cavallo et al. (2024)
Gold sample.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit. Silver sample.