Gaia 2
0.52
UTI
0.63
CN
0.65
Cdens
1.0
CC3
0.16
Clit
1.0
Cdup
Nm (P>50%)
76
Core radius and density
1.5 [pc], 3.2 [pc-2]
- CN 0.63 Moderately populated
- Cdens 0.65 Moderately dense
- CC3 1.0 Very high quality
- Clit 0.16 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
Gaia 2 is a moderately populated, moderately dense object of very high C3 quality. Its parallax locates it at a large distance, well below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very old cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 28.128 | 53.036 | 0.156 | -1.31 | 1.237 | -52.818 |
| Hu & Soubiran | 2025 | 28.127 | 53.048 | â | â | â | â |
| Hunt & Reffert | 2024 | 28.129 | 53.049 | 0.167 | -1.318 | 1.219 | -54.371 |
| Cavallo et al. | 2024 | 28.127 | 53.048 | 0.167 | â | â | â |
| Hunt & Reffert | 2023 | 28.129 | 53.049 | 0.167 | -1.318 | 1.219 | -54.371 |
| Jadhav & Subramaniam | 2021 | 28.136 | 53.058 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 28.136 | 53.058 | 0.099 | -1.181 | 1.299 | â |
| Cantat-Gaudin & Anders | 2020 | 28.136 | 53.058 | 0.099 | -1.181 | 1.299 | 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 | 5.85 | 0.61 | 1.13 | 7943 | -0.450 | 430 | â | 0 |
| Hu & Soubiran | 2025 | â | â | â | â | -0.300(5) | â | â | â |
| Hunt & Reffert | 2024 | 6.33 | 0.61 | 1.13 | 2973 | â | 459(1) | â | â |
| Cavallo et al. | 2024 | 4.85 | 0.95 | â | 12023 | -0.600 | â | â | â |
| Hunt & Reffert | 2023 | 6.33 | 0.61 | 1.13 | 2972 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 5.37 | 0.50 | â | 7943 | â | 402 | â | 0(1) |
| Cantat-Gaudin et al. | 2020 | 5.37 | 0.50 | â | 7943 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 7.83 | â | â | â | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.02 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.02 (50th percentile).
Hu et al. (2021)
Ellipticities (core, all): e_core=0.0967, e_all=0.1274.