OC 0158
0.02
UTI
0.0
CN
0.06
Cdens
0.5
CC3
0.06
Clit
0.12
Cdup
Nm (P>50%)
24
Core radius and density
2.0 [pc], 0.3 [pc-2]
- CN 0.0 Sparse
- Cdens 0.06 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.06 Rarely studied
- Cdup 0.12 Likely duplicate
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
OC 0158 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above 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 absorption parameter (see Parameters). It is rarely studied in the literature.
â ī¸ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously 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 | 318.24 | 59.51 | 1.164 | -2.539 | -3.51 | -24.645 |
| Liu et al. | 2025 | 318.74 | 59.32 | 1.17 | -2.51 | -3.52 | -37.92 |
| Hunt & Reffert | 2024 | 318.742 | 59.319 | 1.17 | -2.513 | -3.52 | -37.923 |
| Hunt & Reffert | 2023 | 318.742 | 59.319 | 1.17 | -2.513 | -3.52 | -37.923 |
| Hao et al. | 2022 | 318.683 | 59.321 | 1.154 | -2.614 | -3.543 | 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 | 0.84 | 1.05 | 0.64 | 11 | 0.250 | 87 | â | â |
| Liu et al. | 2025 | 0.79 | 0.30 | â | 50 | â | â | â | â |
| Hunt & Reffert | 2024 | 0.84 | 1.05 | 0.64 | 9 | â | 87(1) | â | â |
| Hunt & Reffert | 2023 | 0.84 | 1.05 | 0.64 | 9 | â | â | â | â |
| Hao et al. | 2022 | â | 2.21 | â | 13 | 0.250 | 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 174 along with HSC_764, and as primordial binary cluster 302 along with Riddle_6, and of multiple system 49 along with Riddle_6 and HSC_764.
Palma et al. (2025)
Part of multiple system G222, along with Riddle_6 and HSC_764.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).