UBC 490
0.58
UTI
0.58
CN
0.66
Cdens
0.75
CC3
0.45
Clit
1.0
Cdup
Stellar density (N50/rad)
3.3 [N/pc2]
- CN 0.58 Moderately populated
- Cdens 0.66 Moderately dense
- CC3 0.75 High 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 490 is a moderately populated, moderately dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 140.569 | -53.887 | 0.357 | -4.388 | 4.063 | 5.218 |
| Almeida et al. | 2025 | 140.586 | -53.866 | â | â | â | â |
| Hunt & Reffert | 2024 | 140.561 | -53.898 | 0.361 | -4.368 | 4.072 | â |
| Cavallo et al. | 2024 | 140.575 | -53.888 | 0.362 | â | â | â |
| Hunt & Reffert | 2023 | 140.561 | -53.898 | 0.361 | -4.368 | 4.072 | â |
| Dias et al. | 2021 | 140.586 | -53.866 | 0.329 | -4.413 | 4.005 | â |
| Cantat-Gaudin et al. | 2020 | 140.563 | -53.872 | 0.337 | -4.397 | 4.029 | â |
| Castro-Ginard et al. | 2020 | 140.566 | -53.843 | 0.335 | -4.4 | 4.02 | 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 | 2.73 | 1.64 | 1.66 | 80 | 0.448 | 661 | â | â |
| Liu et al. | 2025 | 4.23 | 0.53 | â | 91 | â | â | â | â |
| Almeida et al. | 2025 | 2.72 | 1.76 | â | 95 | â | 827 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 495(1) | â | â |
| Cavallo et al. | 2024 | 2.77 | 1.59 | â | 69 | 0.770 | â | â | â |
| Hunt & Reffert | 2023 | 2.49 | 1.69 | 1.66 | 51 | â | â | â | â |
| Dias et al. | 2021 | 2.72 | 1.76 | â | 95 | 0.126 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.74 | 1.27 | â | 40 | 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 tidal capture (resonant trapping binary) 132 along with DBSB_39.
Palma et al. (2025)
Classified as optical pair P18, along with DBSB_39.
Cavallo et al. (2024)
Gold sample.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.