UPK 122
0.18
UTI
0.0
CN
0.07
Cdens
0.62
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
0.9 [pc], 0.3 [pc-2]
- CN 0.0 Sparse
- Cdens 0.07 Very loose
- CC3 0.62 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
UPK 122 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption 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 | 302.599 | 47.712 | 1.091 | -1.281 | -9.281 | -11.494 |
| Zhang et al. | 2024 | 302.696 | 47.751 | â | â | â | â |
| Cavallo et al. | 2024 | 302.593 | 47.554 | 1.088 | â | â | â |
| Hunt & Reffert | 2023 | 302.696 | 47.751 | 1.089 | -1.233 | -9.279 | -11.514 |
| He et al. | 2022 | 302.673 | 47.75 | 1.098 | -1.352 | -9.274 | â |
| Sim et al. | 2019 | 302.66 | 47.286 | â | -1.34 | -9.26 | 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 | 0.9 | 0.6 | 0.39 | 326 | 0.236 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.227(1) | â | â | â |
| Cavallo et al. | 2024 | 0.93 | 0.21 | â | 427 | 0.700 | â | â | â |
| Hunt & Reffert | 2023 | 0.88 | 0.60 | 0.39 | 138 | â | â | â | â |
| He et al. | 2022 | â | 1.05 | â | 224 | â | â | â | â |
| Sim et al. | 2019 | 0.90 | â | â | 2512 | 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 moving group. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).