Theia 517
0.06
UTI
0.84
CN
1.0
Cdens
1.0
CC3
0.13
Clit
0.1
Cdup
Nm (P>50%)
348
Core radius and density
1.8 [pc], 7.0 [pc-2]
- CN 0.84 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.13 Rarely studied
- Cdup 0.1 Likely duplicate
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 517 is a rich, very dense object of very high 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, intermediate-age cluster (see Parameters). It is rarely studied in the literature.
â ī¸ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously 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 | 322.799 | 48.253 | 3.364 | -7.45 | -19.738 | -6.067 |
| Yan et al. | 2026 | 322.831 | 48.349 | 3.366 | -7.4 | -19.704 | â |
| Zhang et al. | 2024 | 322.83 | 48.349 | â | â | â | â |
| Hunt & Reffert | 2024 | 322.831 | 48.349 | 3.366 | -7.4 | -19.704 | -5.362 |
| Cavallo et al. | 2024 | 322.65 | 48.189 | 3.367 | â | â | â |
| Hunt & Reffert | 2023 | 322.831 | 48.349 | 3.366 | -7.4 | -19.704 | -5.362 |
| Kounkel & Covey | 2019 | 322.793 | 48.258 | 3.329 | â | â | 5.437 |
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 | 0.295 | 0.095 | 0.38 | 127 | -0.009 | 269 | â | â |
| Yan et al. | 2026 | â | â | â | 280 | â | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.088(1) | â | â | â |
| Hunt & Reffert | 2024 | 0.29 | 0.06 | 0.38 | 127 | â | 269(1) | â | â |
| Cavallo et al. | 2024 | 0.30 | 0.41 | â | 102 | 0.070 | â | â | â |
| Hunt & Reffert | 2023 | 0.29 | 0.07 | 0.38 | 126 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.30 | 0.12 | â | 223 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Yan et al. (2026)
Number of WDs: expected from single-star evolution N=5, with probability of formation through binary evolution >=0.5 N=13.
Palma et al. (2025)
Part of multiple system G37, along with OCSN_31, CWNU_1216 and HSC_674.
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).