Theia 399
0.15
UTI
0.0
CN
0.35
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
19.3 [arcmin]
- CN 0.0 Sparse
- Cdens 0.35 Loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 399 is a sparse, loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported 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.
Close
Low extinction
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 93.616 | 17.411 | 1.667 | -0.488 | -4.522 | 17.828 |
| Zhang et al. | 2024 | 93.671 | 17.398 | â | â | â | â |
| Cavallo et al. | 2024 | 93.296 | 17.651 | 1.684 | â | â | â |
| Hunt & Reffert | 2023 | 93.671 | 17.398 | 1.669 | -0.451 | -4.559 | 18.312 |
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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Zhang et al. | 2024 | â | â | â | â | -0.110* | â | â | â |
| Cavallo et al. | 2024 | 0.65 | 0.58 | â | 27 | 0.080 | â | â | â |
| Hunt & Reffert | 2023 | 0.58 | 0.24 | 0.95 | 27 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.