UBC 551
0.42
UTI
1.0
CN
1.0
Cdens
1.0
CC3
0.03
Clit
0.69
Cdup
Nm (P>50%)
643
Core radius and density
2.2 [pc], 14 [pc-2]
- CN 1.0 Very rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.03 Rarely studied
- Cdup 0.69 Likely 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 551 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, old cluster (see Parameters). It is rarely studied in the literature.
Note: This object contains blue stragglers according to at least one source.
Note: This is likely a unique object, which shares a moderate 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 | 256.985 | -44.158 | 0.528 | -2.123 | -5.498 | -10.166 |
| Li et al. | 2023 | 256.977 | -44.153 | 0.52 | -2.12 | -5.49 | â |
| Castro-Ginard et al. | 2020 | 256.984 | -44.147 | 0.508 | -2.092 | -5.437 | 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 | 2.425 | 3.445 | â | 1718 | -0.006 | â | â | 2 |
| Li et al. | 2023 | 2.75 | 2.75 | â | 3162 | -0.006 | â | â | 2(1) |
| Kounkel et al. | 2020 | 2.10 | 4.14 | â | 275 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
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.