UBC 103
0.51
UTI
0.57
CN
0.67
Cdens
1.0
CC3
0.16
Clit
1.0
Cdup
Nm (P>50%)
65
Core radius and density
1.5 [pc], 3.4 [pc-2]
- CN 0.57 Moderately populated
- Cdens 0.67 Moderately 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 103 is a moderately populated, moderately dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, very metal-poor, young cluster (see Parameters). It is rarely 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 | 280.628 | -6.587 | 0.296 | -0.366 | -2.264 | 55.104 |
| Hunt & Reffert | 2024 | 280.624 | -6.586 | 0.297 | -0.374 | -2.278 | 39.032 |
| Celli et al. | 2024 | 280.633 | -6.592 | â | â | â | â |
| Cavallo et al. | 2024 | 280.631 | -6.621 | 0.297 | â | â | â |
| Hunt & Reffert | 2023 | 280.624 | -6.586 | 0.297 | -0.374 | -2.278 | 39.032 |
| Cantat-Gaudin et al. | 2020 | 280.633 | -6.592 | 0.285 | -0.396 | -2.266 | â |
| Castro-Ginard et al. | 2020 | 280.633 | -6.604 | 0.282 | -0.396 | -2.273 | 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 | 2.98 | 1.76 | 2.05 | 58 | -1.390 | 1552 | â | â |
| Hunt & Reffert | 2024 | 3.12 | 1.76 | 2.05 | 76 | â | 2221(1) | â | â |
| Celli et al. | 2024 | â | â | â | 22 | â | 883 | â | â |
| Cavallo et al. | 2024 | 2.00 | 2.55 | â | 39 | -1.390 | â | â | â |
| Hunt & Reffert | 2023 | 3.12 | 1.76 | 2.05 | 76 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.98 | 1.40 | â | 22 | â | â | â | â |
| Kounkel et al. | 2020 | 2.27 | 1.47 | â | 200 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G50, along with CWNU_2543 and CWNU_2221.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).