OCSN 40
0.65
UTI
0.64
CN
1.0
Cdens
1.0
CC3
0.3
Clit
1.0
Cdup
Stellar density (N50/rad)
9.3 [N/pc2]
- CN 0.64 Moderately populated
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.3 Poorly 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 40 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 358.787 | 56.433 | 2.488 | 8.172 | -3.236 | -11.594 |
| Liu et al. | 2025 | 358.86 | 56.48 | 2.46 | 7.92 | -3.13 | -12.71 |
| Zhang et al. | 2024 | 358.858 | 56.484 | â | â | â | â |
| Cavallo et al. | 2024 | 357.674 | 56.376 | 2.463 | â | â | â |
| Hunt & Reffert | 2023 | 358.858 | 56.484 | 2.463 | 7.922 | -3.126 | -12.708 |
| Qin et al. | 2023 | 358.86 | 56.42 | 2.49 | 8.16 | -3.32 | -11.28 |
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 | 0.415 | 0.35 | 0.78 | 14 | -0.133 | â | â | â |
| Liu et al. | 2025 | 0.42 | 0.15 | â | 21 | â | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.035(1) | â | â | â |
| Cavallo et al. | 2024 | 0.41 | 0.99 | â | 6 | -0.230 | â | â | â |
| Hunt & Reffert | 2023 | 0.40 | 0.27 | 0.78 | 9 | â | â | â | â |
| Qin et al. | 2023 | 0.45 | 0.43 | â | 18 | â | 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 19 along with Alessi_20, and as primordial binary cluster 317 along with OCSN_41, and of multiple system 9 along with OCSN_41 and Alessi_20.
Palma et al. (2025)
Part of multiple system G228, along with Alessi_20 and OCSN_41.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.