OCSN 59
0.50
UTI
0.55
CN
0.75
Cdens
1.0
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
59
Core radius and density
0.7 [pc], 3.8 [pc-2]
- CN 0.55 Moderately populated
- Cdens 0.75 Dense
- CC3 1.0 Very high 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
OCSN 59 is a moderately populated, dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low 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 was recently reported 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 | 77.141 | -3.206 | 2.584 | 1.213 | -0.943 | 22.683 |
| Liu et al. | 2025 | 76.84 | -3.34 | 2.58 | 1.2 | -0.86 | 17.39 |
| Swiggum et al. | 2024 | 76.844 | -3.336 | 2.584 | 1.197 | -0.859 | 19.592 |
| Cavallo et al. | 2024 | 77.27 | -2.948 | 2.586 | â | â | â |
| Hunt & Reffert | 2023 | 76.844 | -3.336 | 2.584 | 1.197 | -0.859 | 17.392 |
| Qin et al. | 2023 | 77.03 | -3.25 | 2.61 | 1.26 | -0.8 | 15.41 |
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 | 0.39 | 0.385 | 1.3 | 6 | 0.160 | 81 | â | â |
| Liu et al. | 2025 | 0.51 | 0.04 | â | 3 | â | â | â | â |
| Swiggum et al. | 2024 | 0.38 | â | â | 6 | â | 81 | â | â |
| Cavallo et al. | 2024 | 0.39 | 0.90 | â | 11 | 0.160 | â | â | â |
| Hunt & Reffert | 2023 | 0.38 | 0.45 | 1.30 | 6 | â | â | â | â |
| Qin et al. | 2023 | 0.43 | 0.32 | â | 8 | â | â | â | â |
Liu et al. (2025)
Classified as primordial binary cluster 319 along with HSC_1633, and of multiple system 57 along with NGC_1980 and HSC_1633.
Palma et al. (2025)
Part of multiple system G124, along with NGC_1980 and HSC_1633.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.97 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).