OC 0025
0.22
UTI
0.0
CN
0.35
Cdens
0.62
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
23
Core radius and density
1.3 [pc], 1.8 [pc-2]
- CN 0.0 Sparse
- Cdens 0.35 Loose
- CC3 0.62 Intermediate quality
- Clit 0.06 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
OC 0025 is a sparse, loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near 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 metallicity parameter (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 | 273.146 | -16.431 | 0.539 | 0.549 | 0.457 | 12.568 |
| Hunt & Reffert | 2024 | 273.147 | -16.404 | 0.532 | 0.564 | 0.458 | 20.585 |
| Cavallo et al. | 2024 | 273.149 | -16.427 | 0.53 | â | â | â |
| Hunt & Reffert | 2023 | 273.147 | -16.404 | 0.532 | 0.564 | 0.458 | 20.585 |
| Hao et al. | 2022 | 273.136 | -16.464 | 0.525 | 0.517 | 0.454 | 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 | 1.77 | 2.06 | 0.97 | 164 | -0.058 | 446 | â | â |
| Hunt & Reffert | 2024 | 1.77 | 1.76 | 0.97 | 203 | â | 446(1) | â | â |
| Cavallo et al. | 2024 | 1.37 | 2.36 | â | 44 | -0.380 | â | â | â |
| Hunt & Reffert | 2023 | 1.77 | 1.76 | 0.97 | 203 | â | â | â | â |
| Hao et al. | 2022 | â | 2.46 | â | 126 | 0.265 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P391, along with Gulliver_15.
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).