Alessi 5
(MWSC 1844; FoF 2407; OCSN 138)
- CN 1.0 Very rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
Alessi 5 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | – | 160.833 | -61.089 | 2.508 | -15.386 | 2.526 | 10.065 |
| Almeida et al. | 2025 | 160.621 | -61.118 | – | – | – | – |
| Alfonso et al. | 2024 | 160.904 | -61.086 | 2.484 | -15.376 | 2.542 | – |
| Hunt & Reffert | 2024 | 160.902 | -61.111 | 2.497 | -15.4 | 2.544 | 13.41 |
| Cavallo et al. | 2024 | 160.827 | -61.086 | 2.509 | – | – | – |
| Hunt & Reffert | 2023 | 160.902 | -61.111 | 2.497 | -15.4 | 2.544 | 13.41 |
| Qin et al. | 2023 | 160.87 | -61.09 | 2.5 | -15.36 | 2.52 | 9.65 |
| Just et al. | 2023 | 160.824 | -61.166 | – | – | – | – |
| He et al. | 2022 | 160.7 | -61.029 | 2.502 | -15.453 | 2.556 | – |
| Dias et al. | 2021 | 160.621 | -61.118 | 2.492 | -15.363 | 2.537 | 11.504 |
| Cantat-Gaudin et al. | 2020 | 160.819 | -61.081 | 2.501 | -15.411 | 2.503 | – |
| Liu & Pang | 2019 | 160.691 | -61.076 | 2.494 | -15.354 | 2.569 | – |
| Bossini et al. | 2019 | 160.819 | -61.081 | – | – | – | – |
| Soubiran et al. | 2018 | 160.819 | -61.081 | – | – | – | 12.49 |
| Bica et al. | 2019 | 160.777 | -61.165 | – | – | – | – |
| Cantat-Gaudin et al. | 2018 | 160.819 | -61.081 | 2.501 | -15.411 | 2.503 | – |
| Loktin & Popova | 2017 | 160.785 | -61.167 | – | -14.33 | 4.4 | 8.2 |
| Kharchenko et al. | 2016 | 160.824 | -61.166 | – | – | – | – |
| Kharchenko et al. | 2013 | 160.83 | -61.17 | – | -12.5 | 2.42 | 8.2 |
| Piskunov et al. | 2008 | 160.777 | -61.165 | – | – | – | – |
| Kharchenko et al. | 2007 | 160.78 | -61.17 | – | 0.3 | – | 12.8 |
| Piskunov et al. | 2007 | 160.777 | -61.165 | – | – | – | – |
| Kharchenko et al. | 2005 | 160.78 | -61.17 | – | -14.56 | 3.77 | 12.8 |
| Alessi et al. | 2003 | 160.725 | -61.2 | – | -14.3 | 4.4 | – |
| Dias et al. | 2002 | 160.783 | -61.167 | – | -14.33 | 4.4 | 18.0 |
💡 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 | 0.40 | 0.40 | – | 61 | – | 408 | – | – |
| Alfonso et al. | 2024 | 0.42 | 0.62 | – | 49 | 0.063 | – | – | – |
| Hunt & Reffert | 2024 | – | – | – | – | – | 684* | – | – |
| Cavallo et al. | 2024 | 0.41 | 0.85 | – | 26 | 0.130 | – | – | – |
| Hunt & Reffert | 2023 | 0.38 | 0.40 | 0.73 | 56 | – | – | – | – |
| Qin et al. | 2023 | 0.48 | 0.59 | – | 56 | – | – | – | – |
| Just et al. | 2023 | – | – | – | 58 | – | 18 | – | – |
| He et al. | 2022 | – | 0.50 | – | 40 | – | – | – | – |
| Tarricq et al. | 2022 | 0.42 | – | – | 68 | – | – | – | – |
| Dias et al. | 2021 | 0.40 | 0.40 | – | 61 | 0.064 | – | – | – |
| Cantat-Gaudin et al. | 2020 | 0.42 | 0.62 | – | 68 | – | – | – | – |
| Liu & Pang | 2019 | – | – | – | 34 | -0.250 | – | – | – |
| Bossini et al. | 2019 | 0.35 | 0.59 | – | 53 | -0.133 | – | – | – |
| Soubiran et al. | 2018 | 0.40 | – | – | – | – | – | – | – |
| Cantat-Gaudin et al. | 2018 | 0.40 | – | – | – | – | – | – | – |
| Loktin & Popova | 2017 | 0.42 | 0.46 | – | 40 | – | – | – | – |
| Kharchenko et al. | 2016 | 0.38 | 0.64 | – | 58 | – | – | – | – |
| Kharchenko et al. | 2013 | 0.38 | 0.64 | – | 58 | -0.382 | – | – | – |
| Piskunov et al. | 2008 | 0.40 | 0.46 | – | 51 | – | 18* | – | – |
| Piskunov et al. | 2007 | 0.40 | 0.46 | – | 51 | – | 9 | – | – |
| Kharchenko et al. | 2005 | 0.40 | 0.46 | – | 51 | – | – | – | – |
| Alessi et al. | 2003 | 0.40 | 0.46 | – | 40 | – | – | – | – |
| Dias et al. | 2002 | 0.40 | 0.46 | – | 40 | -0.382 | – | – | – |
💡 Note: The parameters are sometimes
transformed from their original values to match the format of the
columns shown here, see FAQ.
The columns DAv, Bfr, BSS correspond to differential
extinction, binary fraction, and blue stragglers, respectively.
BSS values can be listed as fractions or integers.
(*): indicates that this parameter is
assigned more than one value in the corresponding reference.
