OC 0587
0.40
UTI
0.4
CN
0.77
Cdens
0.62
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
40
Core radius and density
1.1 [pc], 3.8 [pc-2]
- CN 0.4 Poorly populated
- Cdens 0.77 Dense
- CC3 0.62 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
OC 0587 is a poorly populated, dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is rarely studied in the literature.
Note: This object shares a large percentage of members with a later 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 | 193.709 | -61.767 | 0.523 | -5.246 | -1.345 | 97.644 |
| Liu et al. | 2025 | 193.71 | -61.77 | 0.52 | -5.29 | -1.34 | 61.87 |
| Hunt & Reffert | 2024 | 193.707 | -61.767 | 0.517 | -5.285 | -1.339 | 61.871 |
| Cavallo et al. | 2024 | 193.661 | -61.771 | 0.517 | â | â | â |
| Hunt & Reffert | 2023 | 193.707 | -61.767 | 0.517 | -5.285 | -1.339 | 61.871 |
| Hao et al. | 2022 | 193.709 | -61.762 | 0.547 | -5.199 | -1.33 | 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 | 1.91 | 3.2 | 2.45 | 31 | 0.352 | 722 | â | â |
| Liu et al. | 2025 | 5.01 | 1.11 | â | 23 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.84 | 3.51 | 2.45 | 31 | â | 722(1) | â | â |
| Cavallo et al. | 2024 | 1.98 | 3.20 | â | 56 | 0.440 | â | â | â |
| Hunt & Reffert | 2023 | 1.84 | 3.51 | 2.45 | 31 | â | â | â | â |
| Hao et al. | 2022 | â | 2.10 | â | 8 | 0.265 | 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 78 along with CWNU_490, and as primordial binary cluster 236 along with HSC_2550, and of multiple system 27 along with CWNU_490 and HSC_2550.
Palma et al. (2025)
Part of multiple system G159, along with CWNU_490 and HSC_2550.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.76 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.76 (50th percentile).