OC 0401
0.29
UTI
0.36
CN
0.15
Cdens
0.75
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
36
Core radius and density
2.7 [pc], 0.7 [pc-2]
- CN 0.36 Poorly populated
- Cdens 0.15 Very loose
- CC3 0.75 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
OC 0401 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a 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 and metallicity parameters (see Parameters). It is rarely studied in the literature.
Note: This object shares a significant percentage of members with at least one entry reported in the same catalogue. 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 | 104.85 | -23.332 | 1.176 | -3.121 | 3.387 | 37.181 |
| Swiggum et al. | 2024 | 104.686 | -23.326 | 1.185 | -3.069 | 3.395 | 35.248 |
| Cavallo et al. | 2024 | 104.927 | -23.547 | 1.181 | â | â | â |
| Hunt & Reffert | 2023 | 104.686 | -23.326 | 1.185 | -3.069 | 3.395 | 35.587 |
| Hao et al. | 2022 | 104.713 | -23.363 | 1.143 | -2.989 | 3.346 | 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 | 0.81 | 0.335 | 0.53 | 14 | -0.033 | 197 | â | â |
| Liu et al. | 2025 | 0.77 | 0.02 | â | 28 | â | â | â | â |
| Swiggum et al. | 2024 | 0.81 | â | â | 14 | â | 197 | â | â |
| Cavallo et al. | 2024 | 0.92 | 0.52 | â | 6 | -0.330 | â | â | â |
| Hunt & Reffert | 2023 | 0.81 | 0.15 | 0.53 | 14 | â | â | â | â |
| Hao et al. | 2022 | â | 2.03 | â | 10 | 0.265 | â | â | â |
Liu et al. (2025)
Classified as primordial binary cluster 310 along with OC_0395.
Palma et al. (2025)
Classified as genetic pair P242, along with OC_0395.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.98 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).