Theia 974
0.45
UTI
0.44
CN
1.0
Cdens
0.62
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
44
Core radius and density
1.0 [pc], 5.8 [pc-2]
- CN 0.44 Poorly populated
- Cdens 1.0 Very dense
- CC3 0.62 Intermediate quality
- Clit 0.1 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 974 is a poorly populated, very dense object of intermediate C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.
Note: This object shares a large percentage of members with a later 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 | 4.079 | 64.976 | 1.333 | -0.9 | 0.62 | -3.658 |
| Hunt & Reffert | 2024 | 4.076 | 64.966 | 1.343 | -0.89 | 0.643 | -3.403 |
| Cavallo et al. | 2024 | 4.154 | 64.949 | 1.341 | â | â | â |
| Hunt & Reffert | 2023 | 4.076 | 64.966 | 1.343 | -0.89 | 0.643 | -3.403 |
| He et al. | 2022 | 4.067 | 64.975 | 1.333 | -0.904 | 0.607 | â |
| Kounkel & Covey | 2019 | 4.42 | 64.94 | 1.342 | â | â | -7.008 |
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 | 0.725 | 1.72 | 1.29 | 119 | 0.030 | 151 | â | â |
| Hunt & Reffert | 2024 | 0.70 | 1.72 | 1.29 | 119 | â | 151(1) | â | â |
| Cavallo et al. | 2024 | 0.81 | 1.94 | â | 54 | 0.030 | â | â | â |
| Hunt & Reffert | 2023 | 0.70 | 1.72 | 1.29 | 119 | â | â | â | â |
| He et al. | 2022 | â | 2.00 | â | 50 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.75 | 1.29 | â | 519 | 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 G253, along with HSC_950 and UPK_237.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).