UBC 257
0.02
UTI
0.74
CN
0.16
Cdens
0.75
CC3
0.0
Clit
0.05
Cdup
Nm (P>50%)
98
Core radius and density
4.9 [pc], 0.8 [pc-2]
- CN 0.74 Moderately populated
- Cdens 0.16 Very loose
- CC3 0.75 High quality
- Clit 0.0 Rarely studied
- Cdup 0.05 Very likely duplicate
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 257 is a moderately populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by low extinction. It is catalogued as a young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 6 years.
â ī¸ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 153.194 | -60.898 | 0.488 | -6.349 | 3.082 | -11.901 |
| Castro-Ginard et al. | 2020 | 153.185 | -60.893 | 0.47 | -6.32 | 3.073 | 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 | 1.89 | 0.85 | â | 85 | â | â | â | â |
| Kounkel et al. | 2020 | 1.89 | 0.85 | â | 85 | â | â | â | â |
Castro-Ginard et al. (2020)
Coincidence with Sim et al. (2019, J. Korean Astron. Soc., 52, 145) or Liu & Pang (2019ApJS..245...32L), see Sect. 4.1.5.