Theia 260
0.19
UTI
0.27
CN
0.06
Cdens
0.5
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
27
Core radius and density
3.7 [pc], 0.3 [pc-2]
- CN 0.27 Poorly populated
- Cdens 0.06 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.06 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 260 is a poorly populated, 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 near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (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 | 315.768 | 17.26 | 1.639 | 9.263 | -2.697 | -10.682 |
| Zhang et al. | 2024 | 315.858 | 17.44 | â | â | â | â |
| Cavallo et al. | 2024 | 315.835 | 17.32 | 1.626 | â | â | â |
| Hunt & Reffert | 2023 | 315.858 | 17.44 | 1.609 | 9.097 | -2.738 | -13.115 |
| Kounkel & Covey | 2019 | 315.4 | 16.288 | 1.654 | â | â | 5.412 |
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 | 0.6 | 0.27 | 0.63 | 83 | 0.073 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.143(1) | â | â | â |
| Cavallo et al. | 2024 | 0.63 | 0.38 | â | 66 | 0.290 | â | â | â |
| Hunt & Reffert | 2023 | 0.59 | 0.16 | 0.63 | 116 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.60 | 0.27 | â | 83 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.45 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.45 (50th percentile).