UBC 1177
0.20
UTI
0.26
CN
0.04
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
26
Core radius and density
2.9 [pc], 0.2 [pc-2]
- CN 0.26 Poorly populated
- Cdens 0.04 Very 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 1177 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-rich, young cluster (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 | 349.106 | 60.489 | 0.331 | -4.312 | -2.085 | â |
| Hunt & Reffert | 2024 | 349.096 | 60.464 | 0.327 | -4.338 | -2.096 | â |
| Cavallo et al. | 2024 | 349.119 | 60.469 | 0.326 | â | â | â |
| Hunt & Reffert | 2023 | 349.096 | 60.464 | 0.327 | -4.338 | -2.096 | â |
| Castro-Ginard et al. | 2022 | 349.15 | 60.48 | 0.33 | -4.33 | -2.09 | 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 | 2.82 | 1.99 | 1.57 | 28 | 0.590 | 457 | â | â |
| Liu et al. | 2025 | 6.22 | 0.75 | â | 12 | â | â | â | â |
| Hunt & Reffert | 2024 | 2.82 | 2.04 | 1.57 | 28 | â | 457(1) | â | â |
| Cavallo et al. | 2024 | 2.56 | 1.99 | â | 48 | 0.590 | â | â | â |
| Hunt & Reffert | 2023 | 2.82 | 2.04 | 1.57 | 28 | â | â | â | â |
| Castro-Ginard et al. | 2022 | 3.19 | 1.96 | â | 18 | â | 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 73 along with CWNU_459.
Palma et al. (2025)
Classified as optical pair P206, along with CWNU_459.
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).