UBC 26
0.65
UTI
0.78
CN
0.34
Cdens
1.0
CC3
0.56
Clit
1.0
Cdup
Nm (P>50%)
189
Core radius and density
3.0 [pc], 1.7 [pc-2]
- CN 0.78 Rich
- Cdens 0.34 Loose
- CC3 1.0 Very high quality
- Clit 0.56 Moderately 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 26 is a rich, loose object of very high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is moderately studied in the literature.
Note: This object shares a moderate 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 | 285.413 | 22.057 | 1.671 | 2.1 | -5.302 | -12.597 |
| Yan et al. | 2026 | 285.426 | 22.113 | 1.67 | 1.968 | -5.264 | â |
| Li et al. | 2025 | 285.37 | 22.02 | 1.661 | 2.049 | -5.176 | â |
| Alfonso et al. | 2024 | 285.318 | 21.837 | 1.622 | 2.028 | -5.276 | â |
| Zhang et al. | 2024 | 285.426 | 22.113 | â | â | â | â |
| Swiggum et al. | 2024 | 285.426 | 22.113 | 1.67 | 1.968 | -5.264 | -12.476 |
| Hunt & Reffert | 2024 | 285.426 | 22.113 | 1.67 | 1.968 | -5.264 | -11.731 |
| Cavallo et al. | 2024 | 285.026 | 21.503 | 1.661 | â | â | â |
| Hunt & Reffert | 2023 | 285.426 | 22.113 | 1.67 | 1.968 | -5.264 | -11.731 |
| He et al. | 2022 | 285.437 | 22.046 | 1.701 | 2.14 | -5.387 | â |
| Cantat-Gaudin et al. | 2020 | 285.37 | 22.02 | 1.661 | 2.049 | -5.176 | â |
| Cantat-Gaudin & Anders | 2020 | 285.37 | 22.02 | 1.661 | 2.049 | -5.176 | â |
| Bica et al. | 2019 | 285.253 | 21.916 | â | â | â | â |
| Castro-Ginard et al. | 2018 | 285.249 | 21.923 | 1.66 | 2.016 | -5.181 | 6.79 |
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 | 0.585 | 0.87 | 1.25 | 25 | 0.082 | 627 | â | â |
| Yan et al. | 2026 | â | â | â | 35 | â | â | â | â |
| Li et al. | 2025 | 0.60 | 0.95 | â | 38 | 0.251 | â | â | â |
| Alfonso et al. | 2024 | 0.58 | 0.76 | â | 33 | 0.010 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | 0.124(1) | â | â | â |
| Swiggum et al. | 2024 | 0.59 | â | â | 25 | â | 929 | â | â |
| Hunt & Reffert | 2024 | 0.58 | 0.87 | 1.25 | 25 | â | 325(1) | â | â |
| Cavallo et al. | 2024 | 0.63 | 1.24 | â | 14 | 0.040 | â | â | â |
| Hunt & Reffert | 2023 | 0.58 | 0.87 | 1.25 | 25 | â | â | â | â |
| He et al. | 2022 | â | 1.00 | â | 18 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 0.58 | 0.76 | â | 35 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 0.59 | â | â | â | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Yan et al. (2026)
Number of WDs: expected from single-star evolution N=1, with probability of formation through binary evolution >=0.5 N=1.
Palma et al. (2025)
Part of multiple system G4, along with HSC_429 and Alessi_62.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hu et al. (2021)
Ellipticities (core, all): e_core=0.5114, e_all=0.3636.