OC 0077
0.20
UTI
0.29
CN
0.12
Cdens
0.38
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
29
Core radius and density
1.2 [pc], 0.6 [pc-2]
- CN 0.29 Poorly populated
- Cdens 0.12 Very loose
- CC3 0.38 Low 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
OC 0077 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young 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 | 294.848 | 16.567 | 1.081 | -0.883 | -5.916 | -11.771 |
| Hunt & Reffert | 2024 | 294.871 | 16.449 | 1.085 | -0.903 | -5.92 | -4.449 |
| Cavallo et al. | 2024 | 294.815 | 16.588 | 1.084 | â | â | â |
| Hunt & Reffert | 2023 | 294.871 | 16.449 | 1.085 | -0.903 | -5.92 | -4.449 |
| Hao et al. | 2022 | 294.869 | 16.488 | 1.092 | -0.891 | -5.896 | 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 | 0.87 | 1.0 | 1.56 | 28 | -0.381 | 116 | â | â |
| Liu et al. | 2025 | 1.34 | 0.43 | â | 49 | â | â | â | â |
| Hunt & Reffert | 2024 | 0.87 | 1.00 | 1.56 | 28 | â | 116(1) | â | â |
| Cavallo et al. | 2024 | 0.75 | 1.58 | â | 98 | -0.810 | â | â | â |
| Hunt & Reffert | 2023 | 0.87 | 1.00 | 1.56 | 28 | â | â | â | â |
| Hao et al. | 2022 | â | 0.61 | â | 20 | 0.049 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as primordial binary cluster 301 along with Roslund_1.
Palma et al. (2025)
Classified as genetic pair P231, along with HSC_447.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).