Theia 8
0.44
UTI
0.55
CN
0.85
Cdens
0.75
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
60
Core radius and density
1.1 [pc], 4.3 [pc-2]
- CN 0.55 Moderately populated
- Cdens 0.85 Dense
- CC3 0.75 High 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 8 is a moderately populated, dense object of high C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is rarely studied in the literature.
Note: This object shares a large percentage of members with 2 later reported entries. 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 | 315.286 | 77.044 | 2.677 | 5.486 | 3.682 | -20.484 |
| Cavallo et al. | 2024 | 315.009 | 76.684 | 2.647 | â | â | â |
| Hunt & Reffert | 2023 | 315.575 | 77.017 | 2.646 | 5.466 | 3.431 | -34.259 |
| Kounkel & Covey | 2019 | 314.754 | 76.857 | 2.325 | â | â | -8.084 |
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 | 0.43 | 2.5 | 2.29 | 7 | 0.280 | â | â | â |
| Cavallo et al. | 2024 | 0.45 | 2.50 | â | 11 | 0.280 | â | â | â |
| Hunt & Reffert | 2023 | 0.36 | 2.71 | 2.29 | 7 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.43 | 0.25 | â | 3 | â | â | â | â |
Cavallo et al. (2024)
Bronze sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.19 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.19 (50th percentile).