UBC 525
0.38
UTI
0.55
CN
0.14
Cdens
0.75
CC3
0.23
Clit
1.0
Cdup
Nm (P>50%)
59
Core radius and density
0.7 [pc], 0.7 [pc-2]
- CN 0.55 Moderately populated
- Cdens 0.14 Very loose
- CC3 0.75 High quality
- Clit 0.23 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 525 is a moderately populated, very loose object of high 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, very young cluster, but with a large variance across recent sources for the distance, absorption, and age parameters (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 | 196.053 | -63.944 | 0.432 | -4.228 | -1.204 | â |
| Liu et al. | 2025 | 196.14 | -63.95 | 0.43 | -4.24 | -1.18 | â |
| Li et al. | 2025 | 196.023 | -63.941 | 0.436 | -4.202 | -1.219 | â |
| Hunt & Reffert | 2024 | 196.144 | -63.954 | 0.432 | -4.239 | -1.176 | â |
| Celli et al. | 2024 | 196.023 | -63.941 | â | â | â | â |
| Cavallo et al. | 2024 | 196.09 | -63.895 | 0.43 | â | â | â |
| Hunt & Reffert | 2023 | 196.144 | -63.954 | 0.432 | -4.239 | -1.176 | â |
| Cantat-Gaudin et al. | 2020 | 196.023 | -63.941 | 0.436 | -4.202 | -1.219 | â |
| Castro-Ginard et al. | 2020 | 196.051 | -63.922 | 0.434 | -4.206 | -1.21 | 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 | 2.15 | 2.2 | 2.59 | 10 | 0.019 | 864 | â | â |
| Liu et al. | 2025 | 5.04 | 0.77 | â | 12 | â | â | â | â |
| Li et al. | 2025 | 0.99 | 0.57 | â | 1539 | 0.068 | â | â | â |
| Hunt & Reffert | 2024 | 2.15 | 2.20 | 2.59 | 9 | â | 1314(1) | â | â |
| Celli et al. | 2024 | â | â | â | 12 | â | 414 | â | â |
| Cavallo et al. | 2024 | 2.08 | 2.38 | â | 9 | -0.030 | â | â | â |
| Hunt & Reffert | 2023 | 2.15 | 2.19 | 2.59 | 9 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.28 | 2.26 | â | 12 | â | â | â | â |
| Kounkel et al. | 2020 | 2.62 | 2.57 | â | 3 | 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 primordial binary cluster 237 along with HSC_2562, and as tidal capture (resonant trapping binary) 363 along with Theia_2478, and of multiple system 68 along with Theia_2478 and HSC_2562.
Palma et al. (2025)
Part of multiple system G158, along with HSC_2549, HSC_2562 and Theia_2478.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.91 (50th percentile), true positive? (human-assigned).
Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.91 (50th percentile), true positive? (human-assigned).