Theia 401
0.13
UTI
0.0
CN
0.11
Cdens
0.5
CC3
0.03
Clit
1.0
Cdup
Stellar density (N50/rad)
0.5 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.11 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.03 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
Theia 401 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied 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 | 347.858 | 47.656 | 1.469 | -0.874 | -3.466 | -9.281 |
| Zhang et al. | 2024 | 347.809 | 47.781 | â | â | â | â |
| Hunt & Reffert | 2024 | 347.809 | 47.781 | 1.473 | -0.781 | -3.521 | -7.645 |
| Kounkel & Covey | 2019 | 349.908 | 47.983 | 1.446 | â | â | -1.639 |
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 | 0.69 | 0.42 | â | 157 | -0.147 | 46 | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.147(1) | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 46(1) | â | â |
| Kounkel & Covey | 2019 | 0.69 | 0.42 | â | 157 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as moving group. CMD class: 1.00 (50th percentile).