Theia 3397
0.12
UTI
0.44
CN
0.19
Cdens
0.62
CC3
0.03
Clit
0.46
Cdup
Stellar density (N50/rad)
1.0 [N/pc2]
- CN 0.44 Poorly populated
- Cdens 0.19 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.03 Rarely studied
- Cdup 0.46 Possibly 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 3397 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a young cluster (see Parameters). It was recently reported in the literature.
â ī¸ Warning: This is possibly a duplicate object, which shares a significant 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 | 114.008 | -25.545 | 0.939 | -4.93 | 4.07 | 30.967 |
| Yan et al. | 2026 | 113.94 | -25.527 | 0.93 | -4.887 | 4.011 | â |
| Hunt & Reffert | 2024 | 113.94 | -25.527 | 0.93 | -4.887 | 4.011 | 27.682 |
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 | 0.98 | 0.01 | â | 61 | â | 55 | â | â |
| Yan et al. | 2026 | â | â | â | 60 | â | â | â | â |
| Liu et al. | 2025 | 0.98 | 0.01 | â | 62 | â | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 55(1) | 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=3, with probability of formation through binary evolution >=0.5 N=1.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 284 along with NGC_2448.
Palma et al. (2025)
Classified as optical pair P545, along with NGC_2448.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as moving group. CMD class: 1.00 (50th percentile).