UBC 1397
0.23
UTI
0.0
CN
0.47
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
22
Core radius and density
0.8 [pc], 2.4 [pc-2]
- CN 0.0 Sparse
- Cdens 0.47 Loose
- 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
UBC 1397 is a sparse, loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (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 | 116.766 | -28.66 | 0.326 | -2.697 | 2.749 | 44.732 |
| Hu & Soubiran | 2025 | 116.783 | -28.663 | â | â | â | â |
| Hunt & Reffert | 2024 | 116.769 | -28.666 | 0.317 | -2.66 | 2.761 | 44.733 |
| Cavallo et al. | 2024 | 116.783 | -28.662 | 0.319 | â | â | â |
| Hunt & Reffert | 2023 | 116.769 | -28.666 | 0.317 | -2.66 | 2.761 | 44.733 |
| Castro-Ginard et al. | 2022 | 116.78 | -28.66 | 0.31 | -2.68 | 2.74 | â |
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 | 2.905 | 2.14 | 0.76 | 323 | 0.145 | 330 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.150(5) | â | â | â |
| Hunt & Reffert | 2024 | 2.87 | 2.25 | 0.76 | 323 | â | 330(1) | â | â |
| Cavallo et al. | 2024 | 2.94 | 2.03 | â | 589 | 0.440 | â | â | â |
| Hunt & Reffert | 2023 | 2.87 | 2.25 | 0.76 | 323 | â | â | â | â |
| Castro-Ginard et al. | 2022 | 3.39 | 1.89 | â | 135 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.76 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.76 (50th percentile).