UBC 644
0.09
UTI
0.0
CN
0.08
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
5.0 [arcmin]
- CN 0.0 Sparse
- Cdens 0.08 Very loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
UBC 644 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by low extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 6 years.
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.
Distant
Low extinction
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 122.539 | -34.019 | 0.21 | -2.607 | 2.708 | 83.85 |
| Cantat-Gaudin et al. | 2020 | 122.523 | -34.046 | 0.198 | -2.596 | 2.7 | â |
| Castro-Ginard et al. | 2020 | 122.539 | -34.027 | 0.198 | -2.619 | 2.707 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Cantat-Gaudin et al. | 2020 | 4.09 | 0.97 | â | 224 | â | â | â | â |
Dias et al. (2021)
Dubious open cluster.