SAI 47
(MWSC 526)
0.83
UTI
0.52
CN
1.0
Cdens
0.62
CC3
1.0
Clit
1.0
Cdup
Radius (P>50% members)
1.9 [arcmin]
- CN 0.52 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.62 Intermediate quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
SAI 47 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a large* distance, above 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 and mass parameters (see Parameters). It is very well-studied in the literature.
(*): The parallax distance estimate (~5.54 kpc) differs significantly from the median photometric distance (~3.96 kpc).
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 | 80.995 | 42.312 | 0.18 | 0.016 | -0.35 | -9.619 |
| Almeida et al. | 2025 | 81.001 | 42.313 | β | β | β | β |
| Zhang et al. | 2024 | 80.997 | 42.316 | β | β | β | β |
| Hunt & Reffert | 2024 | 80.997 | 42.316 | 0.188 | 0.06 | -0.323 | -11.064 |
| Cavallo et al. | 2024 | 80.931 | 42.322 | 0.185 | β | β | β |
| Hunt & Reffert | 2023 | 80.997 | 42.316 | 0.188 | 0.06 | -0.323 | -11.064 |
| Almeida et al. | 2023 | 81.001 | 42.316 | β | β | β | β |
| Just et al. | 2023 | 80.975 | 42.323 | β | β | β | β |
| Dias et al. | 2021 | 81.001 | 42.313 | 0.187 | 0.111 | -0.311 | β |
| Cantat-Gaudin et al. | 2020 | 81.0 | 42.315 | 0.188 | 0.092 | -0.335 | β |
| SΓ‘nchez et al. | 2020 | 80.992 | 42.314 | β | 0.201 | -0.1 | β |
| Cantat-Gaudin & Anders | 2020 | 81.0 | 42.315 | 0.188 | 0.092 | -0.335 | β |
| Soubiran et al. | 2018 | 81.0 | 42.315 | β | β | β | -9.46 |
| Bica et al. | 2019 | 80.997 | 42.317 | β | β | β | β |
| Cantat-Gaudin et al. | 2018 | 81.0 | 42.315 | 0.188 | 0.092 | -0.335 | β |
| Kharchenko et al. | 2016 | 80.975 | 42.323 | β | β | β | β |
| Dias et al. | 2014 | 80.992 | 42.314 | β | -0.7 | 3.09 | β |
| Kharchenko et al. | 2013 | 80.985 | 42.323 | β | -2.81 | -2.58 | β |
| Kharchenko et al. | 2012 | 80.985 | 42.323 | β | -2.81 | -2.58 | β |
| Glushkova et al. | 2010 | 80.992 | 42.314 | β | β | β | β |
| Dias et al. | 2002 | 80.992 | 42.314 | β | -0.7 | 2.42 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Almeida et al. | 2025 | 3.45 | 2.02 | β | 59 | β | 151 | β | β |
| Zhang et al. | 2024 | β | β | β | β | -0.036* | β | β | β |
| Hunt & Reffert | 2024 | β | β | β | β | β | 733* | β | β |
| Cavallo et al. | 2024 | 4.21 | 2.06 | β | 50 | -0.040 | β | β | β |
| Hunt & Reffert | 2023 | 4.32 | 1.79 | 2.21 | 89 | β | β | β | β |
| Almeida et al. | 2023 | 4.07 | 2.11 | β | 40 | -0.296 | 235* | 0.62 | β |
| Just et al. | 2023 | β | β | β | 1585 | β | 48 | β | β |
| Dias et al. | 2021 | 3.45 | 2.02 | β | 59 | -0.198 | β | β | β |
| Cantat-Gaudin et al. | 2020 | 4.68 | 1.40 | β | 63 | β | β | β | β |
| Cantat-Gaudin & Anders | 2020 | 4.62 | β | β | β | β | β | β | β |
| Soubiran et al. | 2018 | 4.62 | β | β | β | β | β | β | β |
| Cantat-Gaudin et al. | 2018 | 4.62 | β | β | β | β | β | β | β |
| Kharchenko et al. | 2016 | 1.52 | 0.84 | β | 1585 | β | β | β | β |
| Kharchenko et al. | 2013 | 1.52 | 0.84 | β | 1585 | β | β | β | β |
| Kharchenko et al. | 2012 | 1.52 | 0.84 | β | 1585 | β | β | β | β |
| Glushkova et al. | 2010 | 3.86 | 1.86 | β | 316 | β | β | β | β |
| Dias et al. | 2002 | 3.86 | 1.86 | β | 316 | β | β | β | β |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.


Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit.
Cavallo et al. (2024)
Gold sample.