OCSN 64
0.20
UTI
0.28
CN
0.03
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
28
Core radius and density
6.7 [pc], 0.1 [pc-2]
- CN 0.28 Poorly populated
- Cdens 0.03 Very loose
- 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
OCSN 64 is a poorly populated, very loose object of intermediate 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 (see Parameters). It was recently reported in the literature.
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 | 79.511 | -4.037 | 3.024 | 0.349 | 5.207 | 20.072 |
| Zhang et al. | 2024 | 78.467 | -4.849 | â | â | â | â |
| Swiggum et al. | 2024 | 78.467 | -4.849 | 3.071 | 0.338 | 5.175 | 25.769 |
| Cavallo et al. | 2024 | 80.05 | -4.466 | 3.058 | â | â | â |
| Hunt & Reffert | 2023 | 78.467 | -4.849 | 3.071 | 0.338 | 5.175 | 27.485 |
| Qin et al. | 2023 | 80.11 | -3.74 | 3.05 | 0.33 | 5.21 | 23.16 |
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 | 0.33 | 0.54 | 0.62 | 17 | -0.040 | 89 | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.090(1) | â | â | â |
| Swiggum et al. | 2024 | 0.32 | â | â | 21 | â | 89 | â | â |
| Cavallo et al. | 2024 | 0.34 | 0.78 | â | 13 | 0.010 | â | â | â |
| Hunt & Reffert | 2023 | 0.32 | 0.53 | 0.62 | 21 | â | â | â | â |
| Qin et al. | 2023 | 0.42 | 0.54 | â | 13 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P607, along with Theia_139.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.89 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.89 (50th percentile).