Bica 631
0.17
UTI
0.0
CN
0.08
Cdens
0.25
CC3
0.25
Clit
1.0
Cdup
Radius (P>50% members)
5.4 [arcmin]
- CN 0.0 Sparse
- Cdens 0.08 Very loose
- CC3 0.25 Low quality
- Clit 0.25 Poorly studied
- Cdup 1.0 Unique
Overview
Bica 631 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate* distance, near the mid-plane, affected by very high extinction. It is catalogued as a massive, metal-poor, very young cluster (see Parameters). It is poorly studied in the literature.
(*): The parallax distance estimate (~3.86 kpc) differs significantly from the median photometric distance (~2.67 kpc).
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.
Relatively close
Very high extinction
Massive
Metal-poor
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 263.636 | -33.452 | 0.259 | -0.697 | -2.087 | -3.179 |
| Hunt & Reffert | 2024 | 263.679 | -33.479 | 0.275 | -0.64 | -2.074 | -9.508 |
| Cavallo et al. | 2024 | 263.509 | -33.455 | 0.275 | â | â | â |
| Hunt & Reffert | 2023 | 263.679 | -33.479 | 0.275 | -0.64 | -2.074 | -9.508 |
| Bica et al. | 2019 | 263.685 | -33.474 | â | â | â | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Hunt & Reffert | 2024 | â | â | â | â | â | 2414* | â | â |
| Cavallo et al. | 2024 | 2.06 | 5.34 | â | 8 | -0.660 | â | â | â |
| Hunt & Reffert | 2023 | 3.27 | 4.83 | 3.06 | 16 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Silver sample.