UBC 84
0.36
UTI
0.5
CN
0.15
Cdens
0.75
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
51
Core radius and density
2.6 [pc], 0.7 [pc-2]
- CN 0.5 Moderately populated
- Cdens 0.15 Very loose
- CC3 0.75 High quality
- Clit 0.19 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 84 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, young cluster, but with a large variance across recent sources for the metallicity parameter (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 | 15.431 | 61.722 | 0.385 | -1.544 | -1.069 | â |
| Zhang et al. | 2024 | 15.424 | 61.689 | â | â | â | â |
| Hunt & Reffert | 2024 | 15.424 | 61.689 | 0.379 | -1.519 | -1.079 | -34.621 |
| Cavallo et al. | 2024 | 15.845 | 61.729 | 0.38 | â | â | â |
| Hunt & Reffert | 2023 | 15.424 | 61.689 | 0.379 | -1.519 | -1.079 | -34.621 |
| Cantat-Gaudin et al. | 2020 | 15.429 | 61.72 | 0.37 | -1.536 | -0.978 | â |
| Cantat-Gaudin & Anders | 2020 | 15.429 | 61.72 | 0.37 | -1.536 | -0.978 | â |
| Castro-Ginard et al. | 2019 | 15.421 | 61.734 | 0.367 | -1.552 | -0.967 | 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 | 2.575 | 1.84 | 2.6 | 48 | 0.069 | 460 | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.232(1) | â | â | â |
| Hunt & Reffert | 2024 | 2.38 | 1.84 | 2.60 | 49 | â | 460(1) | â | â |
| Cavallo et al. | 2024 | 2.65 | 2.07 | â | 22 | 0.370 | â | â | â |
| Hunt & Reffert | 2023 | 2.38 | 1.84 | 2.60 | 49 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.65 | 1.61 | â | 48 | â | â | â | â |
| Kounkel et al. | 2020 | 2.91 | 2.07 | â | 15 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 2.50 | â | â | â | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.91 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.91 (50th percentile).
Hu et al. (2021)
Ellipticities (core, all): e_core=0.2702, e_all=0.4406.