Theia 1528
0.09
UTI
0.25
CN
0.05
Cdens
0.12
CC3
0.0
Clit
1.0
Cdup
Nm (P>50%)
25
Core radius and density
2.2 [pc], 0.3 [pc-2]
- CN 0.25 Poorly populated
- Cdens 0.05 Very loose
- CC3 0.12 Very low quality
- Clit 0.0 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 1528 is a poorly populated, very loose object of very low C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by low extinction. It is catalogued as an old cluster (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 | 325.548 | 74.774 | 3.606 | 10.38 | 9.18 | -15.671 |
| Hunt & Reffert | 2023 | 323.853 | 74.777 | 3.663 | 10.303 | 9.212 | -17.692 |
| Kounkel & Covey | 2019 | 327.343 | 74.937 | 3.82 | â | â | -15.661 |
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 | 0.26 | 0.145 | 0.3 | 1670 | â | â | â | â |
| Hunt & Reffert | 2023 | 0.26 | 0.14 | 0.30 | 729 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.26 | 0.15 | â | 2612 | â | â | â | â |
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.47 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.47 (50th percentile).