SAI 91
(MWSC 1511; FoF 40)
0.90
UTI
0.77
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
Radius (P>50% members)
3.4 [arcmin]
- CN 0.77 Rich
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
SAI 91 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is very well-studied in the literature.
Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.
Distant
Moderate 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 | β | 129.232 | -50.052 | 0.266 | -4.069 | 4.248 | 46.702 |
| Li et al. | 2025 | 129.243 | -50.045 | 0.251 | -4.085 | 4.229 | β |
| Hu & Soubiran | 2025 | 129.222 | -50.035 | β | β | β | β |
| Almeida et al. | 2025 | 129.234 | -50.044 | β | β | β | β |
| Hunt & Reffert | 2024 | 129.248 | -50.062 | 0.27 | -4.049 | 4.248 | 46.492 |
| Cavallo et al. | 2024 | 129.222 | -50.035 | 0.264 | β | β | β |
| Hunt & Reffert | 2023 | 129.248 | -50.062 | 0.27 | -4.049 | 4.248 | 46.492 |
| Almeida et al. | 2023 | 129.234 | -50.044 | β | β | β | β |
| Just et al. | 2023 | 129.25 | -50.038 | β | β | β | β |
| Dias et al. | 2021 | 129.234 | -50.044 | 0.242 | -4.099 | 4.189 | β |
| Cantat-Gaudin et al. | 2020 | 129.243 | -50.045 | 0.251 | -4.085 | 4.229 | β |
| SΓ‘nchez et al. | 2020 | 129.262 | -50.064 | β | -4.264 | 4.241 | β |
| Cantat-Gaudin & Anders | 2020 | 129.243 | -50.045 | 0.251 | -4.085 | 4.229 | β |
| Liu & Pang | 2019 | 129.253 | -50.031 | 0.248 | -3.905 | 4.134 | β |
| Bica et al. | 2019 | 129.269 | -50.062 | β | β | β | β |
| Cantat-Gaudin et al. | 2018 | 129.243 | -50.045 | 0.251 | -4.085 | 4.229 | β |
| Kharchenko et al. | 2016 | 129.25 | -50.038 | β | β | β | β |
| Dias et al. | 2014 | 129.263 | -50.064 | β | -3.34 | 3.35 | β |
| Kharchenko et al. | 2013 | 129.255 | -50.04 | β | -4.03 | 1.71 | β |
| Glushkova et al. | 2010 | 129.264 | -50.064 | β | β | β | β |
| Dias et al. | 2002 | 129.262 | -50.064 | β | -2.92 | 3.79 | β |
π‘ 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 |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 3.09 | 1.30 | β | 763 | -0.043 | β | β | β |
| Hu & Soubiran | 2025 | β | β | β | β | -0.230* | β | β | β |
| Almeida et al. | 2025 | 3.06 | 1.63 | β | 452 | β | 458 | β | β |
| Hunt & Reffert | 2024 | β | β | β | β | β | 909* | β | β |
| Cavallo et al. | 2024 | 2.42 | 1.28 | β | 1413 | -0.250 | β | β | β |
| Hunt & Reffert | 2023 | 3.40 | 1.38 | 1.38 | 354 | β | β | β | β |
| Almeida et al. | 2023 | 3.23 | 1.75 | β | 344 | -0.071 | 419* | 0.54 | β |
| Just et al. | 2023 | β | β | β | 676 | β | 286 | β | β |
| Dias et al. | 2021 | 3.06 | 1.63 | β | 452 | -0.100 | β | β | β |
| Cantat-Gaudin et al. | 2020 | 3.44 | 1.18 | β | 525 | β | β | β | β |
| Cantat-Gaudin & Anders | 2020 | 3.57 | β | β | β | β | β | β | β |
| Liu & Pang | 2019 | β | β | β | 513 | 0.250 | β | β | β |
| Cantat-Gaudin et al. | 2018 | 3.57 | β | β | β | β | β | β | β |
| Kharchenko et al. | 2016 | 3.33 | 1.81 | β | 676 | β | β | β | β |
| Kharchenko et al. | 2013 | 3.33 | 1.81 | β | 676 | β | β | β | β |
| Glushkova et al. | 2010 | 3.09 | 1.58 | β | 631 | β | β | β | β |
| Dias et al. | 2002 | 3.09 | 1.58 | β | 631 | β | β | β | β |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit. Silver sample.
Cavallo et al. (2024)
Gold sample.