Theia 72
0.32
UTI
0.33
CN
0.59
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
33
Core radius and density
0.9 [pc], 2.9 [pc-2]
- CN 0.33 Poorly populated
- Cdens 0.59 Moderately dense
- CC3 0.5 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 72 is a poorly populated, moderately dense object of intermediate C3 quality. Its parallax locates it at a very close distance, near 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 absorption parameter (see Parameters). It is rarely studied in the literature.
Note: This object shares a moderate 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 | 101.704 | -9.777 | 3.455 | -0.946 | -4.332 | 25.834 |
| Liu et al. | 2025 | 101.7 | -9.79 | 3.45 | -0.99 | -4.3 | 27.43 |
| Swiggum et al. | 2024 | 101.702 | -9.786 | 3.455 | -0.989 | -4.297 | 28.711 |
| Cavallo et al. | 2024 | 101.805 | -9.746 | 3.463 | â | â | â |
| Hunt & Reffert | 2023 | 101.702 | -9.786 | 3.455 | -0.989 | -4.297 | 27.426 |
| Kounkel & Covey | 2019 | 101.396 | -9.278 | 3.383 | â | â | 4.694 |
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 | 0.3 | 0.185 | 0.54 | 27 | -0.020 | 120 | â | â |
| Liu et al. | 2025 | 0.31 | 0.10 | â | 32 | â | â | â | â |
| Swiggum et al. | 2024 | 0.28 | â | â | 27 | â | 120 | â | â |
| Cavallo et al. | 2024 | 0.30 | 0.72 | â | 26 | -0.020 | â | â | â |
| Hunt & Reffert | 2023 | 0.28 | 0.16 | 0.54 | 27 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.32 | 0.21 | â | 31 | â | â | â | â |
Liu et al. (2025)
Classified as primordial binary cluster 348 along with ZHBJZ_1, and of multiple system 80 along with ZHBJZ_1 and Theia_379.
Palma et al. (2025)
Part of multiple system G248, along with Theia_379 and ZHBJZ_1.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.63 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.63 (50th percentile).