Theia 2561
0.15
UTI
0.58
CN
1.0
Cdens
0.75
CC3
0.0
Clit
0.31
Cdup
Stellar density (N50/rad)
5.6 [N/pc2]
- CN 0.58 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.0 Rarely studied
- Cdup 0.31 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 2561 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (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 | 318.459 | 46.382 | 0.797 | -2.965 | -3.507 | 12.289 |
| Hunt & Reffert | 2024 | 318.48 | 46.407 | 0.801 | -2.962 | -3.511 | 10.061 |
| Cavallo et al. | 2024 | 318.503 | 46.384 | 0.799 | â | â | â |
| Hunt & Reffert | 2023 | 318.48 | 46.407 | 0.801 | -2.962 | -3.511 | 10.061 |
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 | 1.23 | 1.27 | 2.25 | 52 | 0.050 | 349 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 349(1) | â | â |
| Cavallo et al. | 2024 | 1.26 | 1.41 | â | 46 | 0.050 | â | â | â |
| Hunt & Reffert | 2023 | 1.20 | 1.13 | 2.25 | 59 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G191, along with HSC_708 and Theia_3327.
Cavallo et al. (2024)
Gold sample.