Theia 2478
0.10
UTI
0.0
CN
0.41
Cdens
0.5
CC3
0.3
Clit
0.32
Cdup
Stellar density (N50/rad)
2.0 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.41 Loose
- CC3 0.5 Intermediate quality
- Clit 0.3 Poorly studied
- Cdup 0.32 Possibly duplicate
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 2478 is a sparse, loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.
â ī¸ Warning: This is possibly a duplicate object, which shares a significant percentage of members with at least one previously 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 | 197.833 | -64.296 | 0.461 | -4.996 | -1.464 | 35.114 |
| Liu et al. | 2025 | 197.81 | -64.3 | 0.42 | -4.95 | -1.51 | 9.75 |
| Wei et al. | 2025 | 197.953 | -64.213 | 0.484 | -5.581 | -1.485 | â |
| Hunt & Reffert | 2024 | 197.809 | -64.302 | 0.424 | -4.953 | -1.507 | 9.746 |
| Cavallo et al. | 2024 | 198.347 | -64.286 | 0.431 | â | â | â |
| Hunt & Reffert | 2023 | 197.809 | -64.302 | 0.424 | -4.953 | -1.507 | 9.746 |
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 | 2.31 | 1.25 | 2.38 | 270 | 0.380 | 432 | 0.62 | â |
| Liu et al. | 2025 | 3.10 | 0.48 | â | 93 | â | â | â | â |
| Wei et al. | 2025 | 2.52 | 1.26 | â | 576 | 0.500 | 641 | 0.62 | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 222(1) | â | â |
| Cavallo et al. | 2024 | 1.90 | 1.24 | â | 372 | 0.260 | â | â | â |
| Hunt & Reffert | 2023 | 2.10 | 1.42 | 2.38 | 169 | 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 tidal capture (resonant trapping binary) 363 along with UBC_525, and of multiple system 68 along with HSC_2562 and UBC_525.
Palma et al. (2025)
Part of multiple system G158, along with HSC_2549, UBC_525 and HSC_2562.
Cavallo et al. (2024)
Gold sample.