PHOC 30
0.38
UTI
0.54
CN
0.65
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
57
Core radius and density
1.1 [pc], 3.2 [pc-2]
- CN 0.54 Moderately populated
- Cdens 0.65 Moderately dense
- CC3 0.5 Intermediate quality
- Clit 0.1 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
PHOC 30 is a moderately populated, moderately dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption 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 | 144.703 | -51.243 | 0.537 | -6.273 | 5.105 | â |
| Liu et al. | 2025 | 144.72 | -51.22 | 0.53 | -6.25 | 5.1 | â |
| Hunt & Reffert | 2024 | 144.715 | -51.224 | 0.531 | -6.25 | 5.103 | â |
| Cavallo et al. | 2024 | 144.68 | -51.261 | 0.534 | â | â | â |
| Hunt & Reffert | 2023 | 144.715 | -51.224 | 0.531 | -6.25 | 5.103 | â |
| Hunt & Reffert | 2021 | 144.708 | -51.263 | 0.492 | -6.251 | 5.099 | 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 | 1.785 | 1.535 | 2.35 | 124 | 0.200 | 293 | â | â |
| Liu et al. | 2025 | 2.82 | 0.46 | â | 145 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.73 | 1.56 | 2.35 | 102 | â | 293(1) | â | â |
| Cavallo et al. | 2024 | 1.84 | 1.51 | â | 324 | 0.200 | â | â | â |
| Hunt & Reffert | 2023 | 1.73 | 1.56 | 2.35 | 102 | 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) 328 along with OC_0513, and of multiple system 38 along with OC_0513 and CWNU_1300.
Palma et al. (2025)
Part of multiple system G41, along with OC_0513 and CWNU_1768.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).