OC 0185
0.23
UTI
0.0
CN
0.22
Cdens
0.62
CC3
0.16
Clit
1.0
Cdup
Nm (P>50%)
18
Core radius and density
1.2 [pc], 1.1 [pc-2]
- CN 0.0 Sparse
- Cdens 0.22 Very loose
- CC3 0.62 Intermediate 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
OC 0185 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 and mass parameters (see Parameters). It is rarely studied in the literature.
Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 332.684 | 63.302 | 1.085 | -0.922 | -2.259 | -18.299 |
| Yan et al. | 2026 | 332.741 | 63.396 | 1.077 | -1.301 | -2.486 | â |
| Liu et al. | 2025 | 332.74 | 63.4 | 1.08 | -1.3 | -2.49 | -20.23 |
| Swiggum et al. | 2024 | 332.741 | 63.396 | 1.077 | -1.301 | -2.486 | -20.509 |
| Hunt & Reffert | 2024 | 332.741 | 63.396 | 1.077 | -1.301 | -2.486 | -20.228 |
| Cavallo et al. | 2024 | 331.315 | 62.668 | 1.078 | â | â | â |
| Hunt & Reffert | 2023 | 332.741 | 63.396 | 1.077 | -1.301 | -2.486 | -20.228 |
| Hao et al. | 2022 | 332.756 | 63.382 | 1.119 | -0.739 | -2.242 | 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 | 0.91 | 1.12 | 2.27 | 6 | -0.059 | 512 | â | â |
| Yan et al. | 2026 | â | â | â | 9 | â | â | â | â |
| Liu et al. | 2025 | 1.12 | 0.32 | â | 15 | â | â | â | â |
| Swiggum et al. | 2024 | 0.91 | â | â | 6 | â | 900 | â | â |
| Hunt & Reffert | 2024 | 0.90 | 1.12 | 2.27 | 6 | â | 125(1) | â | â |
| Cavallo et al. | 2024 | 0.92 | 1.31 | â | 5 | -0.140 | â | â | â |
| Hunt & Reffert | 2023 | 0.90 | 1.12 | 2.27 | 6 | â | â | â | â |
| Hao et al. | 2022 | â | 0.96 | â | 5 | 0.022 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Yan et al. (2026)
Number of WDs: expected from single-star evolution N=0, with probability of formation through binary evolution >=0.5 N=0.
Liu et al. (2025)
Classified as primordial binary cluster 95 along with CWNU_1126, and as tidal capture (resonant trapping binary) 331 along with Pismis-Moreno_1, and of multiple system 34 along with Pismis-Moreno_1, CWNU_1126, CWNU_1228, HSC_853 and HSC_824.
Palma et al. (2025)
Part of multiple system G30, along with Pismis-Moreno_1, CWNU_1126, HSC_824, CWNU_1228, FSR_0398 and CWNU_446.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.94 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.94 (50th percentile).