Alessi 22
0.38
UTI
0.26
CN
0.13
Cdens
0.75
CC3
0.38
Clit
1.0
Cdup
Radius (P>50% members)
61.1 [arcmin]
- CN 0.26 Poorly populated
- Cdens 0.13 Very loose
- CC3 0.75 High quality
- Clit 0.38 Poorly studied
- Cdup 1.0 Unique
Overview
Alessi 22 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is poorly studied in the literature.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Very close
Low extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 357.196 | 36.24 | 2.808 | -4.409 | -13.067 | -7.161 |
| Hu & Soubiran | 2025 | 357.648 | 36.101 | â | â | â | â |
| Zhang et al. | 2024 | 357.172 | 36.229 | â | â | â | â |
| Cavallo et al. | 2024 | 357.648 | 36.101 | 2.802 | â | â | â |
| Hunt & Reffert | 2023 | 357.172 | 36.229 | 2.804 | -4.364 | -12.792 | -5.507 |
| Dias et al. | 2014 | 357.029 | 36.205 | â | -0.78 | -3.48 | 7.2 |
| Dias et al. | 2002 | 357.029 | 36.205 | â | -3.6 | -10.5 | 7.2 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.160* | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.053* | â | â | â |
| Cavallo et al. | 2024 | 0.35 | 0.65 | â | 550 | -0.020 | â | â | â |
| Hunt & Reffert | 2023 | 0.34 | 0.30 | 0.66 | 671 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.